Document 3QVnpg5gB4xO48rLxYOXXbMEJ

FILE NAME Household Contact HC DATE 1966 Apr 5 DOC HC051 DOCUMENT DESCRIPTION Dept of Labor - General Safety and Health Standards for Federal Supply Contracts , i P : _LLIONS , PART 50-204 SECTION I OF THE CODE OF FEDERAL REGULATIONS General Safety and Health Supply Standards for Federal Contracts UNDER THE HEALEY PUBLIC CONTRACTS ACT Radiation Standards appear in a separate publication II This publication conforms to the Code of Federal Regulations as of April 5 1966 the date this reprint was authorized UNITED STATES DEPARTMENT OF LABOR Bureau of Labor Standards WASHINGTON D.C. 1032 DEFENDANT'S PART SAFETY AND HEALTH STANDARDS FOR FEDERAL SUPPLY CONTRACTS Section General SCOPE AND APPLICATION MATERIAL STORAGE 50-204.1 Scope and application BUILDING AND APPURTENANCES APPURTENANCES 50-204.2 50-204.3 50-204.4 Buildings Floors Building greet 50-204.52 50-204.63 50-204.54 0-204.65 50-204.66 Height Small articles Pipe and other long stack Hamardous chemicals Cates in cylinder OUTDOOR STORAGE STAIRWAYS OR STEPS 30-204.9 Stair width of treads and beight of risers 50-204.10 50-204.11 50-204.12 Stairway maintenance Treads Stairway railings and handrails 50-204.71 50-204.72 50-204.75 50-204.74 50-204.75 50-204.76 50-204.77 Aisle spacing Drainage Clearance signs Derail and bumper blocks Traffic control signs Open pits tanka vau ditches etc. GUARDING OF FLOOR OPENINGS AND FLOOR HOLES 30-204.17 50-204.18 50-204.19 50-204.20 Stairway floor openings Ladderway floor openings Hatchway and chute floor Floor bait GUARDING OF SIDED FLOORS PLATFORMS AND RUNWAYS 50-204.25 50-204.26 Open floor and platform Runway guarding KAILINGS AND GUARDS FLAMMABLE LIQUIDS 50-204.82 50-204.83 50-204.84 50-204.85 50-204.86 50-204.87 30-204.88 50-204.89 50-204.90 50-204.91 50-204.92 Sources of ignition Vegetation removal Housekeeping Electrical lighting Ventilation Refuse storage Open flame devices prohibited Bonding and grounding Relief vents Storage in other than fammable storage buildings Safety containers , a 50-204.27 Standard railing PAINTS AND PAINTING 50-204.28 50-204.29 Stair railing Strength of standard railing and 50-204.34 30-204.35 30-204.36 50-204.37 ELEVATORS Elevator inspection Hoistways Under safety device Hatch limit controls 50-204.97 Storage of puinus varisbe lace quers thinners etc. 50-204.98 Storage locations 50-204.99 -Storage of flammable paint ma- terials in opened containers 50 204.100soited clothing and drop eloch 50-204.101 Housekeeping paint scrapings and paint maturated containers 50-204.42 50-204.47 50-204.48 50-204.49 50-204.50 ILLUMINATION Minimum standards LADDERS Construction and use of portable ladders Kails of portable ladders Painting of wooden ladders Stepladders 50-204.102 Ventilation of harmful substanGES 50-204.103 Ventilation of flammable vapors 50 204.104Smoking or open Bames prohibitzd 50-204.105 Electrical equipment 50-204.106 Electric motors 5500-20240.41.01807ESntcolroasguereofdrciovmibnugsbteilbtlse and flans- mable cleaning materials FIRE PREVENTION 50-204.31 Fixed ladders AISLES AND PASSAGEWAYS 50-204.56 50-204.57 Maintenance Aisle widths 50-204.11350-204.113 Equipment general 50 204.114 ers general rules 50 204.115 Gamification of extinguishers _ATIONG 50-304 t= CAL VESSELS GUARD STANDARDS FOR MECHANICAL POWER TRANSMISSION 50-204.120 50-204.121 50-204.122 Boilers Steam wokers digesters glue pott etc. Unfired presure vesseli TOOLS AND EQUIPMENT 50-204.179 50-204.180 50-204.381 30-204.182 50-204.183 Materials Disk shield and U guarda Approved materiala Wood guards Guards for horizontal overhead 50-204.127 204.12B 50-204.129 50-204.330 Maintenance Portable electric power tools Portable pseumatic tools Cables ropes and chains VENTILATION AND PROTECTION IN WELDING AND CUTTING 50 204.135Welding and cutting in confined 50-204.196 50-204.137 50-204.136 50-204.139 50-204.140 50-204.141 spaces in Venulation confined spaces Mechanical ventilation Welding and cutting involving metals of unit significance Prouction to other employees metal arc welding General welding and curcing ELECTRICAL INSTALLATION AND EQUIPMENT 50 204.148Electrical installation and equip- ment MECHANICAL POWER TRANSMISSION APPARATUS 30-204.184 50-204.185 belti Guards for horisontal overticed , rope and chain driver Guard rails and to boards MISCELLANEOUS MACHINE GUARDING 50-204.190 Lathes and automatic screw ma- chines 50-204.191 50-204.192 50-204.193 Drill presses Planers and shapers metal Shear 50 204.194 50-204.195 50-204.195 30-204.197 Power pressL Foot and hand presci Other power safety devices 50-204.198 50-204.199 50-204.200 Platen premes Abrasive wheel Revolving drumm and cylinders 50-204.201 Fane WOODWORKING MACHINERY 50 204.208Circular tahle mws 50-204.209 Swing and diding cut mawa 50-204.210 Inverted swing of BZWS jump saws 30-204.153 50-204.154 50-204.155 Flywheels Cranks and connecting rods Tail rods or extension piston roda 50-204.211 50-204.212 50-204.213 Radial news Portable circular mws Hand saws and band runaws 50-204.156 Governar balla 50-204.157 Shafting installation 50 204.158Guarding horizontal shafting 50-204.159 Guarding vertical and inclined shafting 50 204.160 Projecting shaft ends 50-204.161 transmission apparanis lo- cated in basemua 50-204.162 Pubeys and chain 50-204.163 Horizontal belts ropes 50-204.164 drives Overhead chain and link belt drives 30-204.165 Vertical and inclined belts 50-204.166 Vertical belts 50-204.167 pulley beln 50-204.168 50-204.169 50-204.170 Gear Sprockets and chaina Openings for oiling 50-204.171 Friction drivmL 50 204,172Keys set screws jections and ; other pro- 50-204.214 50-204.215 50 204.21650 204.216 50-204.217 Jointers Wood shapers hand panel raisers and similar machines Planing wolding sticking and matching machines Banding machines HOUSEKEEPING 30-204.229 General 30-204.230 Ficons 50-204.231 Flammable materials 50-204.232 Tools and other materials 50-204.233 Receptacles for waste disposal 50 204.234Sweeping and refuse removal TOILET FACILITIES AND WASH ROOMS 50-204.239 Separate toilet for each sex 50-204.240 50-204.241 50-204.242 50-204.243 30-204.244 Location Water closets Construction of toilet roqums Chemical closets and privies Washing facilities 50-204.173 Collars 50 204.174Coupling 50-204.245 50-204.245 Change rooms Retiring rooms for women oe eee eee REGULATIONS 10-306 LUNCH ROOMS AND FOOD HANDLING ENVIRONMENTAL CONDITIONS ' 30-204.281 Location 50-204.252 30-204.253 Waste food disposal Presence of toxic materiais 50-204.275 50-204.276 Toxic gases vapors fumes dust and mists Threshold limit values DRINKING WATER 50-204.258 Potable water 50-204.259 potable water ; 50-204.288 50-204.289 VENTILATION General ventilation and semper ature requirement Local exhaust ventilation MEDICAL SERVICES 50-204.264 Medical services EYE PROTECTION 50-204.269 General requirement 50-204.270 First for chemical burns 50-204.293 NOISE Noise PERSONAL PROTECTIVE EQUIPMENT 50-204.298 Personal protective equipment 50-204.300 MINING Federal Mine Safety Code AUTHORITY The provisions of this Part 30-204 issued under setz , 4 49 Stat 2036 2038 41 US.C. 35 38 sec 7 60 5:21 241 U.S.C. 1006 Source The provisions of th^s Part 50 otherwise noted 204appear at 25 F.R. 13809 Dec. 28 1960 unless RADIATION STANDARDS * 50-204.305 through 50-204.320 appear tion II in a separaseptaraete publica- publica- SCOPE AND APPLICATION Section 50-204.1 Scope and application * a The Healey Public Contracts Act 40 Sut 2036 41 U.S.C. 35 et seq requires that con- tracts entered into by any agency of the United States for the manufacture or furnishing of materials sup- plies articles and equipment in any amount exceeding 10,000 must contain among other provisions a mipulation that No part of such contract will be per- formed nor will any of the materials supplies articles or equipment to be manufactured or furnished under said contract be manufactured or fabricated in any plants factories buildings or surroundings or under working conditions which are unsanitary or hazardous dangerous employees or to the health and unfety of engagedin the performance of the contract This Part 50 20o4f this chapter expresses certain minimum safety and health standards which will be applied in the administration and enforcement of the Act in- cluding proceedings under in section 5 and 41 CFR Part 50-203 Subpart A to determine whether par ticular contracts subject to the Act are being or have been performed in compwl ithiita s sn afetc y ae nd bealth requirements b In all administrative enforcement and inverti- gative proceedings conduced by the United States Department of Labor under the Act official notice - will be taken of the fact that failure to comply with the requirements expressed in this Part 50-204 of this chapter results in working conditions which are unsanitary or hazardous to employees within the meaning of section e of the Act and contracts incur porating the stipulation it requires c In formal enforcement proceedings under sec tion 5 of the Act respondents will be permitted to demonstrate by reliable substantial and probative evidence that their failure to comply with the requirements expressed in Part 50-204 of this chapter did not result in working conditions which were unsanitary or hazardous or dangerous to employees but only if the answtoetr he compl fila ed i undn ert41 CFR 50 203.3 makes express allegation to that effect identi fying the particular code unit challenged and setting out the factual basis for the challenge In the event such ime is drawn and reliable substantial and probative evidence is introduced in support of the challenge the pertinent portions of the publications.puoblicatfions.of the American Standards Association Inc. American Society of Mechanical Engineers National Fire Pro- tection Association National Board of Fire Underwriters the Public Health Service of the United States Department of Health Education and Welfare the Bureau of Mines of the United States Department of the Interior and the Atomic Energy Commission will be considered together with any other evidence that may be adduced in support of the regulation SULATIONB 10 306 y 5 _te of the reliable . substantial and probative enucace supports a finding that the working conditions prohibited in the regula- tion are unsanoi r t hazaarrdoy us or dangertoo uthse bealth and safety of employees d The standards expressed in Part 50 20o4f this chapter are for application to ordinary employment situations and do not preclude proof or recognition of the necessity of higher standards for employment situations of extraordinary hazard Neither do the stand- ards expressed in this Part 50-204 of this chapter purport to describe all of the working conditions which are unsanoir htazaarrdoyus or dangeroutso the health and safety of employees Other working conditions may be found to be unsanoi r htazaarr douys or danger- ous to the health and safety of employees on evidence to that effect or without such evidence where such unsanitary or hazardous or dangerous characteristic should be apparent to a radional and prudent person of common experience . e Compliance with the standards expressed in Part 50-204 of this chapter will not relieve anyone from any obligation to comply with any more strict standard stemming from any other source whatsoever BUILDINGS AND APPURTENANCES ~ Section 50-204.2 Buildings Buildings and all appurtenances thereto including bridges towers balconies runways and platforms shall be structurally safe to prevent collapse than ladders or elevators as remote from each other as possible shall be provided on every floor including basements and cellars of every building or section where persons are employed On the street floor at least one of these shall be a door leading directly out- Section 50-204.3 Floors , side the building and the other may be a door leading 2 No floor or platform shall be so loaded as to have a factor of safety of less than four That is the weight placed upon a floor or platform shall no^ - ceed fourth of the breaking strength of the plat form or floor b Floors other than those resting directly on solid ground when used for heavy storage shall be clearly posted to show maximum safe floor loads * c All floor surfaces shall be kept clean and dry and maintained in a smooth free from holes or pro- jections that might cause tripping and reasonably non- slippery condition d Where the type of operation necessitates work- inogn floor areas which would be otherwise wet or slippery such areas shall be covered with mats grates cleats or other high friction floor coverings e Safe means of access ruited to conditions shall be provided to every overbead point to which employ oes are called upon to go in connection with their outside the building or a standard borizontal exit On upper floors and basements one exit shall be an en- closed stairway or makeproof tower and the other or others may be inside stairways or horizontal exits or fire esca pe stairs : b Exit doors Doors shall swing in the direction of exit and open in such a mannears not to obstruct passaog r ceorrwida orsyussed as ways of Egres No chairs or seats fixtures chutes materials or equip- ment shall block or in any way jeopardize the use of ways and means provided for egres All exit doors and windo usewd sas means of egrest in case of fire or panic shall be so arranged as always to be opened readily from the inside Locks on doors and windows if provided shall not require the use of a key to open c Exit signs All or mean meas ns of egress shal be provided with a sign having on it the word EXIT which shalble in letters at least five inches in height and planlyindicate to persons within the building the employment . Section 50-204.4 Building egress a Exits Not less than two means of egress other location of such egress - Directional signs to the means of egress should be provided where necessary STAIRWAYS OR STEPS Section 50-204.9 Stair width of treads and beight of risers There shall be no variation in the width of treads and beiofgrisherstin any fight Where variation in heights of risers in different flights is necessary on account of varying story heights such variations shall not exceeindch All treads shall be at least 10 inches wide REGULATIONS 80-204 Section VAZ3.10 Stairway maintenance Every stairway or step shall be maintained in good repair free from pr^"trudingbolts screws nails dirt or slippery conditions and no storage shall be permitted on stairways Section 50-204.11 Treads Treads thall be renewed when the surface including the nosing shows wear to the extent of 1 4inch or more All metal treads shall have a nurface reaws illoren aso- n- ably prevent slipping Section 50-204.12 Stairway railings and handrails Every fight of stairs having four or more risers shall be equipped with a stair railing or handrails con- structed to conform to the requirements of sections 50 204.28 and 50 204.2u9nder the following conditions a On stairways of width less than 44 inches and having both sides enclosed least one handrail on the right side descending b On stairways of width lem than 44 inches and having one side open least one stair railing that shall be on the open side c On stairways of width less than 44 inches and having both sides open stair railing on each side d On stairways of width 44 inches or more but less than B8 inches hanond eacr h ena closi ed l side and one stair railonienacgh open side e On stairways 88 inches or more in width handrail on each enclosed side one stair railing on each open side and one intermediate stair railing lo- cated approximately midway of the width f Winding stairs shall be equipped with a band rail so offset as to prevent walking on any portions of the treads having width less than 6 inches GUARDING OF FLOOR OPENINGS AND FLOOR HOLES Section 50 204.17 Stairway floor openings A railing constructed to conform to the requirements of sections 50 204.2a8nd 50 204.2s9hall be provided on all exposed sides of stairway floor openings except at entrance to stairway Standard toe railings with toe boards on all other exposed tides both constructed in accordance with sections 50- 204.27 and 50-204.29 The removable railing shall be kept in place when the opening is not in use c Where operating conditions necessitate the feeding of material into any hatchway or chute open- be provided also except in stair towers Section 30-204.18 Ladderway floor openings ing from all sidethse guarding requiremewinlltbse satisfied if bars chains or other adequate protection Every ladderway floor opening shall be guarded is provided to prevent a person from falling through by a standard railing with standard toe heard on all exposed sides except at entrance to opening Section 50-204.19 Hatchway and chute BOOT Every hatchway and chute floor opening shall be guarded either by of 3 Hinged opening cover standard strength and construction equipped with ralling constructed in accordance with sections 50-204.27 and 50 204.29 so as to leave no exposed side When the opening not in use the cover shall be closed b A removable railing with toe boards on not more than two sides of the opening and permanent Section 50-204.20 Floor hole Every floor bole except those described in sections 50 204.1750 204.1850-204.19 shall be guarded either by a A railing constructed in conformance with the requirement in sections 50-204.27 and 50-204.29 with stantod e ba oarrd d on all exposed sides or cover hinged b A floor opening in place While the cover is open floor holes shall be constantly attended by someone or shall be protected by a port- able enclosing railing _ GUARDING OF SIDED FLOORS PLATFORMS AND RUNWAYS Section 50-204.25 Open Boor and platform a Every sided foor shall be guarded by a railing constructed in accordance with section 50 204.27 and 50 204.2o9n all open sides 5 fect or mONT above the adjacent floor or ground level except whert there is entrance to a ramp stairway or fixed ladder The railing shall be proviwditehda toe board when- ever beneath the open rides 1 Perscao n n pas ri is 2 There moving machinery or 3 There is equipment with which falling materials could create a hamard b The intermediate railing and the toe board required by sections 50-204.27 and 50 204.29may be omitted where materials have to be regularly pamed over the edge of the floor as in lumber storage or - oe ATIONE PART 50-301 7 vi more from the c The entire railing may be temporarily removed from particular sections of sided Boors where regular operating conditions make a permanent railing wholly impracticable Section 50-204.26 Ruowzy guarding Every runway shall be guarded by a railing con- structed in accordance with sections 50-204.27 and 50- 204.29 on all open sides 5 feet or more above Boor or ground level Wherever tools machine parts or mas terials are likely to be used on the runway a toe board shall also be proviondeeacdh exposed side 1 Runways used exclusively for special purposes sucahs oiling shifting or filling tank care may have the railing on one side amitted where operating conditions necessitate ruch omission providing there is no falling hazard RAILINGS AND GUARDS Section 50-204.27 Standard railing A standard railing shall conos f tiopsratil inter- mediate rail and posts having a vertical beight of 42 inches from upper surface of top rail to floor plat- form runway or ramp level The top rail shall be mnooth surfaced throughout the length of the railing The intermediate rail shall be approximately halfway between the top rail and floor platform runway or ramp The ends of the rails shall not overhang the terminal posts except where such overhang does not constitute a projection hazard Section 50-204.28 Stair railing A stair railing shall be of construction similar to a standard railing but the vertical height shall be not more than 34 inches nor less than 30 inches from upper surface of top rail to surface of tread in line with face of riser at forward edge of tread 3 Intermediate rails shall not be required where stairways are 22 inches or less in width Section 50-204.29 Strength of standard railing and , stair railing The strength of standard railings and stair railings under different types of construction is specified as follows a Wood railing For wood railings the posts sha bel oflat least 2 inch by 4 inch stock spaced not to exceed 8 feet the top rails shabl e l of at least 2 inch by 4 inch stock or of two right angle piece of at feast by 4 1 inch inch stock and the intermediate rails shall be 2 by or of at least inch 2 inch stock of at least 1 inch by 4 inch stock b Pipe railing For pipe railings the posts and top rails shall be metal pipe of at least 1inches inside diameter and the intermediate rails shall be metal pipe of at least 1 inch inside diameter The spacing of shall not posts exceed 8 feet c Structural metal railings For structural metal railings the posts and top rails shall be angle iron of at least 1inches by 1inches by inch or other structural shapes of equivalent bending strength and the intermediate rails shall be angle iron of at least 1inches by 1...inchebsy inch or other structural shapes of equivalent bending strength The sparing of posts shall not exceed 8 feet d Anchor posts The anchoring of posts and framing of members for railings of all types shall be of such construction that the completed structure shali be capable of withstanding a load of at least 200 pounds applied in any direction at any point of the top rail e Toe board A toe board shall be 4 inches in vertical height from top edge to the level of the floor platform runway or ramp It shall be securely fa5urned in place and with not more than inch clear- sub- ance above floor level It may be made of any stantial material either solid or with openings not over inch in length ELEVATORS Section 50-204.34 Elevator inspection Elevator inspection by a competent elevator inspec tion service of maintenance contract on an annual basis will be acceptable as evidence of satisfactory installation and maintenance : Section 50-204.35 Hoistways All hoistway openings at the floor level to the eleva tor shall be protected by doors or gates either manually or mechanically and interlocked with the elevator control so that it ,,imposible to start the elevator until the door or gate is locked in the closed RECULATIONE 50-206 .. at it imposstiobolpeen the doot or gate when the car is not at the landing Section 50 204.36Under car safety device ' All elevators other than bydraulic elevators thall be equipped with an under car safety devite operated by speed governor control that will hold the elevator in case of cable failure or over speeding Section 50-201.37 Hatch limit controls All types of elevators shall be equipped with upper and lower travel limit devices that will normally bring the car to rest at either terminal and a final limit switch that will prevent the movement in either direc- ope if nope enedd by the car as the result of excessive over travel in either direction ILLUMINATION Section 50-204.42 Minimum standards 1 Illumination shall be provided and distributed to all working areas as required in these regulations b Seeing tasks requiring discrimination of Ene detail under conditions of fair contrast and where the nature of the work is very exacting and prolonged shall be provided with a minimum of 100 candles of illumination c Seeing tasks requiring moderate discrimination of detail over prolonged periods of time and under conditions of moderate contrast shall be provided with a minimum of 50 candles of illumination d Seeing tasks requiring moderate discrimination of detail over intermittent periods of time and under conditions of normal contrast shall be provided with a minimum of 30 candles of illumination c Casual sering tasks not involving discrimination of fine detail shall be provided with a minimum of 10 candles of illumination Rough f seeing tasks not requiring critical seeing shall be provided with a minimum of 3 candles of illumination LADDERS Section 50 204.47 Construction and use of portable ladders Portable ladders shall be substantially built set level and well secured Section 50-204.48 Rails of portable ladders Rails of portable ladders shall always project at least three feet above working level and shall be of sound material Section 50-204.49 Painting of wooden ladders Wooden ladders shall not be painted as painting covers up defects Linseed oil or oil stain shall be used instead Section 50-204.50 Stepladders All stepladders shall be provided with an automatic locking device or spreader of not more than 40 degrees to hold the front and back sections in open position Section 50-204.51 Fixed ladders a Rest platforms If fixed ladders are used to ascend to heights exceeding 30 fret a landing or rest platform shall be provided for each 30 feet or fraction thereof unless the ladder is provided with safety cages Rails b Rails of fixed ladder to landings shall extend a distance of at least 3 fret above the landing c Rungs The rungs may be omitted above the landing Where an employee must step a greater dis- tance than 14 inches from the ladder to roof tank hoir etc. a landing shalble provided d Guard rails All fixed ladder landings shall be equipped with a standard guard rail and toe boards so arrange as to give the safest possible access to the ladder Such platforms shall not be len than 24 incinhwe ids th AISLES AND PASSAGEWAYS Section 50-204.56 Maintenance defined by painted lines curbings or other methods of Permanent aisles and passageways shall be kept clear and in good repair with no obstructions acroorsisn marking Section 50-204.37 Aisle widths Where industrial mucks are in customary use one- aisles that might cause tripping Where due to lack of proper identification aisles and passageways uz likely to becomes hazardows they shall be clearly way traffic nisies shall be at least 2 feet wider than the widest vehicle Two aisles shall be at least 3 feet wider than twice the width of the widen vehicle _ATIONS 50-104 g MATERIAL STORAGE Section 50-204.62 Height a All material in hags containers or bundles mored in tiers shall be stacked blocked interlocked and limited in height so that it is staso b thal t iteis secure against sliding or collapse b Where automatic sprinkler protection is pro- vided clearance of at least 18 inches shall be maintained between the tops of materials and the underside of lowest beams or other overhead structures Whee is at reliance placed on bose streams clearance of least be 3 feet shall maintained between the tops of piles and the underside of the lowest bearns girders or other obstructions which restrict the play of hose streams over the material Section 50-204.63 Small articles Small articles shall be stored in containers suitable to the material such as small cans or trays that can be stacked , Section 50-204.64 Pipe and other long mock Pipe and other long stock shall be stored in suitable racks or blocked to prevent spreading or rolling PID- jecting ends shall be protected by location railings or barriers Section 50-204.65 Hazardous chemical Hazardous chemicals shall be distinctively marked to indicate their nature and stored in containers or locations suitable to the material Section 50-204.66 Cases cylinders * Cylinders shall be supported in an upright position so as to prevent them from falling or rolling b Cylinder shall be kept away from excesive beat such as the direct rays of the sum c Cylinders shall be stored away from commbusoble . materials d Empty cylinder shall be plainly marked EMPTY and the valves shall be closed The empty cylinders shall be segregated from the full cylinders and returned to the supplier as soon as practicable e Valve covers shall be kept in place at all times when the cylinder is not in use OUTDOOR STORAGE Section 50-204.71 Aisle spacing Aisles shall be maintained between pilm between buildings and between piles and the boundary of the storage site Aisles shall be wide so as to reduce the danger of spread of fire from pile to pile and to permit ready access for fire fighting or emergency removal of material Section 50-204.72 Housekeeping The entire storage site shall be kept free from un- becessary accumulations of combustible materials Weeds and BJZES shall be kept down and the area kept clean Section 50-204.7 Drainage Proper drainage shall be provided Section 50-204.74 Clearance signs Clearance signs to warn of clearance limits shall be provided Section 50 204.75Derail and bumper blocks Derail and bumper blocks shall be provided on spur tracks Section 50-204.76 Traffic control signs Traffic control signs to warn pedestrian vehicular and railroad traffic shall be provided Section 50-204.77 Opm pits tanks rats ditches ctc Covers or guard rails shall be provided to protect all open pits tanks vata ditches etc. near which people are regularly employed FLAMMABLE LIQUIDS Section 50-204.82 Sources of ignition All sources of ignition shall be prohibited in areas where flammable liquids are stored handled and processed Suitable warning and No Smoking signs shall be posted in all such areas ees ote O- OT - 8 Section 50-204.83 Vegetation removal The areas where flammable liquids are stored handled or procemed shall be left clear of rubbish bruth long gram or other combustible material at all times _ULATIONS 50-201 . sass 8 Section 50-204.89 Bonding and grounding seturauations of flammable liquids on floors walls electrically and other surfaces art prohibited All spills of flam- e mable liquids shall be cleaned up immediately Storage tanks and systems shall be and grounded = Section 50-204.90 Relidl vents bonded Storage tanks shall be equipped with proper relief a venti Tank vents shall be located to Electrical lighting shall be the only means used for _ not opeopn en wn artificial illumination in areas where flammable liquids flaz^ esstacks beating apparatus or any other sQALICE vapors fumes dust or gases are present All elec- of ignition Vent screens shall not be painted trical equipment and installations shall be of the ex- Section 50 204.91 Storage in other than flammable plosion proof type Section 50-204.85 Ventilation storage buildings p A ventilated steel cabinet or a cabinet lined with non- combustible material shall be provided for the storage All buildings rooms and compartments where fammable liquids are stored processed or used shall be properly ventilated to prevent accumulation of flam- mable vapors of more than a total of 10 gallons of flammable liquids in buildings used for other than storage Not more than a total of 30 gallions shall be stored in any one cabinet nor shall any individual container execed 5 Section 50-204.87 Refuse storage In buildings shops or rooms where Bammable liquids are handled or stored a closing metal refuse gallon capacity in such a cabinet Containers must be of metal and kept tightly closed Storage in drums of over 50 gallons of flammable liquids shall be outside the work room can shall be provided and maintained in good condition Section 50-201.88 Open flame devices prokbited Section 50-204.92 Safety containers Handling of all flammable liquids by hand containers shall be in approved type safety containers substantially Open flame heating devices shall not be used in artas where flammable liquids are present constructed to avoid the danger of leakage and designed to minimize the likelihood of spilling PAINTS AND PAINTING Section 50-204.97 Storage of paints varnishes lan quers thinners etc. Packages containing paints varnishes lacquers thinners or other volatile materials shall be kept tightly closed when not in actual use Section 50 204.98Storage locations Sealed containers of paints varnishes lacquers thin- ners and other fammable paint materials shall be kept in a ventilated location free from excessive best smoke sparks ^-ameor direct rays of the sun Section 50-204.99 Storage of Bammable paint mate- rialsin opened containers Flammable paint materiawlhesn in excesosf 10 gallons and not exceeding 50 gallons shall be stored in a ventilated steel cabinet or a cabinet lined with noncombustible material Containers shall be kept tightly closed when noitn use Section 50 204.100soiled clothing and drop soiled clothing and drop cloths when not in use shall be stored in ventilated steel cabinett Section 50-204.101 Housekeeping Paint scrapings and paint saturated debris thall be removed from the premises daily Section 50-204.102 stances Ventilation of harmful sub- Ventilation adequate to reduce the concentration of harmful substances in the atmosphere thall be provided as referred to in section 50 204.86 Section 50-204.10 Ventilation of flammable vapors Ventilation adequate to prevent the accumulation of flammable vapors to hazardous levels of concentration shall be provided in all areas where spray painting dipping or similar processes are performed Section 50-204.104 Smo or k openi flan mes pg ro- hibited No smoking open flame exposed fame beating elements or other sources of ignitoif oanny kind shall be permitted in areas or rooms where spray painting print dipping or similar processes are done RICULATIONS 50 301 11 = equipment ., matches or electrical equipment are peccssary where indoor spray painting paint dipping or similar processes are performed they shall be of the explosion type Section 50-204.106 Electric motors Electric motor driving exhaust fans shall not be placed inside booths or duen exhausting flammable materials Section 50-204.107 Enclosure driving belts Belts shall not enter duct or booth exhausting Bam mable materials unless belt and pulley within the duct , or booth are thoroughly enclosed Section 50-204.108 Storage of combustible and flammable cleaning materials Combustible and flammable cleaning materials at the establishment shall be mored in tightly closed metal containers FIRE PREVENTION Section 50 204.113 Equipment general Fire fighting equipment suitable to the conditions and hazards involved shalble provided and maintained in an effective operating condition A systematic inspectioonf these devices is required Section 50-204.114 First fire fighting extin- guishers general rules The following general rules shall be applied to all types of first fire extinguishers a Persons who may have occasion to use any fire extinguisher shall have knowledge of the proper way to use the device effectively b The instructions of the manufacturer of the extinguisher as to charging maintenance and operations shall be followed exactly All extinguishers thall be examined at least once a year to determine positively that they are in operating condition c Frequent inspections shall be made to deter- mine that extinguishers are in their designated places are readily accessible have not been damaged or tam- pered with and that nozzles are not clogged Section 50-204.115 Chaifiation of extinguishers Listed below are various classes of fires and the extinguishing equipment which shall be maintained appurtenant to the various materials identified a Class A Fires Fires in ordinary combustible material where the quenching and cooling effects of quantities of water er solutions containing large parcentage of water are of first importance Required extinguishing equipment and acid pump tank extinguishers or water barrels and buckets b Class B Fires Firms in flammable liquids greases and timilar materials where blanketing effect isential isential Required extinguishing equipment- foam carbon tetrachloride CO dry powdteypre extinguishers or and buckets and ashops Carbon tetrachloride extinguishers shall not be used in a con- fined area c Class C Fire Fire in electrical equipment where the use of nonconducting extinguishing agent is of first importance Required extinguishing equip ment ar dry powder pressure extinguishers PRESSURE VESSELS Section 50-204.120 Boilers Boiler inspection and approval on an annual basis by a recognized bailer inspection service will be accept- able evidence of antisfactory installation and maintenance Section 50-204.121 Steam cookers digesten glue pots etc. All pressure vessels to which steam is supplied from an outside source shall be designed for themaximuvata line pressure to which the vessel will be subjected On such vessels it is required that in addition to the neces sary pressure reducing valve a safety valve be installed on the venel itself or on the line between it and the pressure reducer There shall be no means of cutting off or bypaning this safety valve Inspection and ade- quate maintenance of the vessel including regular testing of the safety valve aremandatory Section 30-204.122 Unfired pressure vessels a Air receivers thall be so installed that all drains handholes and manholm therein are easily accessible REGULATIONS 10-206 b Air receivers shall be supported with sufficient clearance to permit a complete external inspection and to avoid corrosion of external surfaces c Under no circumstances shall air receivers be buried underground or located in an inaccessible place d The receiver shall be located as close to the compressor or aftercooler as is possible to keep the dis- shall be in a cool to charge short e The receiver located place facilitate the condensation of moisture and oil vapori TOOLS AND EQUIPMENT Section 50-204.127 Maintenance Each employer shall be responsible for the safe condition of the tools used by his employees whether furnished by him or by thun and be sure that such tools are suited by safe design and construction for the work to be done Section 50-201128 Portable electric power tools a Electric power tools showing woITH deteriorated or inadequate insulation split or chipped plugs wom or bent plugi terminals defective switch shall be repaired b Portable electric power tools shall be effectively grounded to maintain at all times an effective ground on the noncurrent carrying parts of the tools Section 50-204.129 Portable pneumatic tools a The operating trigger on portable operated pneumatic equipment shall be so located as to minimize the possibility of accidental operation and shall be arranged to close the air inlet valve automatically when the pressure of the operator's hand is removed b A tool retainer shall be installed on each piece of pneumatic equipment which without such a res tainer may eject the tool c No tool change or work other than regular oper- ations shall be made or done on any piece of portable operated pneumatic equipment unless the nop valve in the air line supplying that equipment is closed Section 50-204.130 Cables ropes and chains a Chains ropes cables hooks rings slings and other devices and accessories used for hoisting and lift- ing shall not be subjected to greater working loads than recommended by their manufacturers They shall be frequently inspected and shall be renewed when inspec- tion reveals unsafe conditions b Bolts or nails shall not be used to connect splice or shorten chains Knots shall not be tied in the chain c A boist cable shall be considered unsafe and shall be replaced when upon inspection 10 percent or more of the total number of wires are brokeinn a length equal to eight diameters of the cable orwhen the wires on the crown of the strand are worn down to les than 60 percent of their original diameter d Crane hoist cable shall be lubricated and inspected at frequent intervals VENTILATION AND PROTECTION IN WELDING AND CUTTING Section 50-204.135 Welding and cutting in confined spaces For the purpose of this section a confined space shall mean , a A space of less than 10,000 cubic feet per welder or b A space having an overhead heiofg lemhthtan 16feet or c A space in which there are structural barriers to the extent that they signifiobcstaruncttclryo ventilation Section 50-204.136 Ventilation in confined spaces All welding and cutting operations carried on in confined spaces shall be adequately mechanically ventilated to prevent the accumulation of toxic gases or posible oxygen definciency or air supplied respira- tons approved by the US Bureau of Mines thall be provided to the welder and all other personnel in the Section 50-204.137 Mechanical ventilation Mechanical ventilation shall consist of either gen- eral ventilation systems or local exhaust systems Gentral ventilation a shall be at the minimum rate of 2,000 cubic feet per minute per welder b Local exhaust shall consist of freely movable hoods intended to be placed by the welder as near as practicable to the work being welded and provided with a rate of air flow to sufficient maintain a velocity in the direction of the hood of 100 linear feet per minute in the zone of welding when the hood is at in most remote distance from the point of welding a REGULATIONS 50-304 13 and cutting invotring cance So 8 an d cutting involving the following metals whether or not in confined spaces or in other enclosed spsa hallc be e donesin accordance with the provisions of 204.136 and 204.137 1 bearing base of filler metals or metals coated with bearing materials 2 Lead base metala 3 Cadmium filler materials b Welding or cutting involving the following metals in confined spaces shall be done using local exhaust ventilation or line respirators approved by the U.S. Bureau of Mines 1 Metals containing lead other than as an impurity or metals coated with bearing materials including paint 2 Cadmium or adjum base metals 3 Metals coated with mercury metals including paint 4 containing base or filler metals Because of its high toxicity work involving beryllium shall be done with both local exhaust ventilation and line respirators Section 50-204.139 Protection to other employees In all cases employees in the immediate vicinity of welding operations shall be protected in accordance with sections 50-204.269 and 50-204.298 Section 50-204.140 Inart metal welding Since the inert metal welding process in- volves the production of ultraviolet radiation of inten- cities five to thirty times that produced during shielded metal welding the decomposition of chlorinated solvents by ultraviolet rays and the liberation of toxic fumes and gases employees shall not de permitted to engage in or be exposed to the proces unless a The use of chlorinated solvents is kept at lean 200 feet from the exposed are surfaces prepared with chlorinated solvents are thoroughly dry before welding is permitted on such surface b Shaded goggles with side shields are worn by belpers and others in the area not protected from the art by screening c Protective clothing is worn by welders oth- ers within the area exposed to radiation so that the skin is covered completely to prevent burns and other other damage by ultraviolet rays shirts worn are dark in color to reduce reflection to the face from under neath the helmet exposed cotton clothing is covered since it disintegrates rapidly when exposetdo high in- tensities of ultraviolet rays welding belmets and hand openings shields are free of leaks and highly reflective surfaces and free of d Local exhaust ventilation or supplied air respi rators are provided in all cases when doing incrt metal welding of stainless steel to protect against dangerous concentrations of nitrogen dioxide Section 50-204.141 General welding and cutting . Welding and cutting not involving conditions or materials described in sections 50-204.195 and 50- 204.138 may normally be done without special precautions but where because of unusual physical or atmospheric conditions a harmful accumulation of contaminants would exist mechanical ventilation or suitable respiratory protective equipment shall be provided ELECTRICAL INSTALLATION AND EQUIPMENT Section 50-204.148 ment Electrical installation and equip equipment Electrical conductors and installed with in or on buildings and other premises and the condue- tors that connect the installation to a supply of elec tricity and other outside conductor adjacent to the premises shall conform to the minimum requirement of the National Electrical Code 1959 Edition Na- tional Fire Protection Association MECHANICAL POWER TRANSMISSION APPARATUS Section 50-204.15 Flywheels Flywheels located so that any part is 7 feet or lem above Boor or platform shall be guardedin one of the following ways a With an enclosure of sheet perforated or ex- panded metal or woven wire For standards see BEC- tions 50-204.179 and 50 204.180 b With guard rails placed not less than 15 inches LIGULATIONS- 60-306 wwen When flywheel ex- _ 23 within 12 inches of Boor a standard too board shall also be provided For standardes section 50-204.185 e An adjustagbualred to be used for startitnhge engine or for running adjusument may be provided at the flywheeolf gas or oil engines A alot openinfogr the jack bar will be permitted d Wherever Bywheels are above working areas guards shall be installed having sufficient strength to hold the weight of the flywheel in the event of a shaft or wheel mounting failure it shall be protected as stated above unless it is located 15 feet or more above driveway c Shafting under bench machines shall be en- statbyiaostnataiornayry casing or by a trough at sides and top or sides and bottom as location requires The sides of the trough shall come within at least 6 inches of the underside of table or if shafting is located near floor within 6 inches of floor In every case the sides of the trough shall extend at least 2 inches beyond the shafting or protuberance For requirements regard ing material and construction see sections 50-204.179 and 50-204.181 Section 50 204.154Cranks and connecting rods Granks and connecrotdsinwhegn exposed to con- tact shall be guarded in accordance with sections 50 204,179 and 50 204.18o0r by a guard rail as described Section 50-204.159 shafting Guarding vertical and inclined Vertical and inclined shafting 7 feet or less from Boor or working platform excepting maintenance runways shall be enclosed with a stationary casing in in section 50-204.185 accordance with requirement of sections 50-204.179 Section 50-204.155 Tuil rods or extension piston Tall rods or extension piston rods shall be guarded in accordance with sections 50-204.179 and 50 204.- 181 or by a guarar il don sides and end with a clearance of not less than 15 nor more than 20 inches when and 50-204.181 Section 30-104.160 Projecting shaft ends a Projecting shaft ends shall present a mucoth edge and end and shall not project more than onehalf the diameter of the shaft unless guarded by nODrotating caps or safety sleeves rod is fully extended b Unused ways shall be filled up or covered Section 50-204.156 Governor balls Governor balls 6 feet or less from the floor or other working level when exposed to contact shall be provided with an enclosure extending to the top of the guvernor balls when at their highest position The materials used in the construction of this enclosure shall conform to sections 50-204.179 and 50 204.181 Section 50-204.157 Shafting installation a Each continuous line of shafting shall be se- cured in a position against excessive wise move- ment b Inclined and vertical shafts particularly in- clined idler shafts shall be securely held in position against endwise thrust a All exposed parts of horizontal shafting 7 feet or less from floor or working platform excepting runways used exclusively for oiling or running adjustments shall be protected by a stationary caring enclosing shafting complorebytaetl rouygh meloxing side and top or sides and bottom of shafting as loca- b Wherever shafting extends over a driveway Section 50-204.161 transmission apparatus located in basements All mechanical power transmission apparatus located in basements towers and rooms used exclusively for power transmission equipment shall be guarded in accordance with these standards except that the re- quirements for safeguarding belts pulleys and shafting may be omined if the following conditions are me a The basement tower or rooin occupied by transmission equipment is locked against unauthorized entrance b The vertical clearance in passageways between the floor and power transmission beams ceiling or any other objects is not less than 5 feet 6 inches c The ootingis dry firm and level d The route followed by the oiler is protected in such manner as to prevent accidents Section 50 204.162Pulleys Asty parts of which are 7 feet or less from the floor or working platform guabergduae rdd ed in accordance with the standards specified under section 50-204.179 and 50-204.181 Pulleys serving as balance wheels eg punch premes on whi thecpoh int of contact between belt and pulley is more than 6 feet 5 inches GULATIONS 60-304 15 1. - guar witdh aedd itk Section 50-204.165 Vertical and inclined belts fi" fi fl - subon 50 204.180 a Verticaanld inclined belti shall be enclosed by Section 50-204.163 Horizontal belts ropes and chain drives a Where both runs of borizontbealtls 7 feefet et or lem from the floor level the guard shall extend to at least fifint che es e abon ve the beorltota standard height see table section 50-204.181 except that where both runs of a borizontal belt are 42 inches or * guard conforming to standards in sections 50- 204.179 and 50-204.181 b All for incliin ncleinded belts thall be arranged in such a manner that a minimum clearance of 7 feet is maintained between belt and floor at any point outside of guard Section 50-204.166 Vertical belts less from the Boor the belt shall be fully enclosed in accordance with sections 50-204.179 and 50 204.181 In power plants or development rooms a guard rail may be used in lieu of the requirement in section 50-204.163 b Overhead horizontal belts with lower part 7 Vertical belts running over a lower pulley more than 7 feet above floor or platform shall be guarded at the bottom in the same manner as borizontal overbead belts if conditions are such as mated in section 50 204.1631 2 and 3 feet or less from the floor or platform shall be guarded Section 50-204.167 pulley belts on sides and bottom in accordance with section 50-204.183 c Horizontal overhead belts more than 7 feet above floor or platform shall be guarded for their entire length under the following conditions 1 If located over passageways or work places and traveling 1800 feet or more per minute 2 If center to center distance between pulleys is 10 feet or more 3 If belt is 8 inches or more in width For detail of guard construction and for sizes of material see section 50-204.383 and table following section 50-204.184 d Where the upper and lower runs of horizontal belts are so located that passage of persons between them would be possible the passage shall be either 1 Completely barred by a guard rail or other barrier in accordance with sections 50-204.179 and 50-204.181 or 2 Where panage is regarded as necessary there shall be a platform over the lower run guarded on either side by a railing completely filled in with wire mesh or other filler or by a solid barrier The upper run shall be so guarded as to prevent contact therewith either by the worker or by objects carried by him In power plants only the lower run of the belt need be guarded Section 50-204.164 drives Overhead chain and link belt Overhead chain and link belt drives are governed by the same rules as overhead horizontal belts and shall be guarded in the same manner as belts section 50-204.163 a cone belt and pulley shall be equipped with a belt shifter so constructed as to guard adequately the point of the belt and pulley If the frame of the belt shifter does not adequately guard the point of the belt and pulley the point shall be further protected by means of a vertical guard placed in front of the pulley and extending at least to the top of the largest step of the cone b If the belt is of the endless type or laced with rawhide laces and a belt shifter is not desired the poi of n the t belt pulley shall be protectbyeda point guard located in front of the cone extending at least to the top of the largest step of the cone and formed to show the conot f o theucor ne in ordetro give the point of the belt and pulley the maximum protection c If the cone is located less than 3 feet from the floor or working platform the cone pulley and belt shall be guarded to a height of 3 feet regardless of whether the belt is endlen or laced with rawhide Section 50-204.168 Gears Gears shall be guarded in accordance with one of the following specifications a A complete enclosure b A standard guard as descinrsei ctib one 20d 4.- 181 at least 7 feet high extending 6 inches above the mesh point of the gear c By a hand guard covering the face of the gear and having flanges extended inward beyond the root of the teeth on the exposed siod r e sids es Where any portion of the train of gears guarded by a band guard is less than 6 feet from the floor a dick guard or a com- plete enclosure to the height of 6 feet shall be required REGULATIONS REGULATIONS 50 104 .. . sprockets and chains AL spreme spreme wheels and chains shall be enclosed un- less more than 7 feet above the floor or platform Where the drive extends over other machines or work ing areas protection against falling thall be provided Section 50-204.170 Openings for oiling When frequent oiling must be made openings with binged or sliding closing covers shall be provided All points not readily accessible shall have oil feed tubes if lubricant is to be added while machinery is in motion Section 50-204.171 Friction drives a The driving point of all friction drives when exposed to contact shall be guarded b All arm or spoke friction drives and all web friction drives with holes in the web shall be entirely cnclosed c All projecting bolts on friction exposed to contact shall be guarded drives where Section 50-204.172 Keys Net NrOWS and other projections All projecting keys set screws and other projections in revolving parts shall be removed or made Bush or guarded by metal covers This does not apply to keys or set screws within guar or sprocket casings or other enclosures por to keys set screws or oil cups in bubs of pulleys less than twenty inches in diameter where they are within the plane of the rim of the pulley Section 50-204.173 Collar All revolving collars including split collars shall be tylindrical and screws or bolts used in collars thall not project beyond the largest peripheroyf the collar Section 50-204.174 Couplings 2 Shaft couplings shall be so constructed as to present no bazard from bolts outs set screws or revolving surfaces b Bolts nuts and set screws will however be permitted where they are covered with safety sleeves or where they are used paralwilthethle shafting and are countersunk or else do not extend beyond the fange of the coupling GUARD STANDARDS FOR MECHANICAL POWER TRANSMISSION Section 50-204.179 Materials a Standards conditions will be secured by the use of the following materials Expanded metal perfo rated or solid metal or wire mesh on a frame of angle iron or iron pipe securely fastened to Boor or to frame of machine see section 50-204.181 50-204.181 1 All metal shall be free from burrs and sharp 2 Wire mesh shall be of the type in which the wires are securely fastened at every cross point either by welding soldering or galvanizing except in case of diamond or square wire mesh made of No. 14 gauge wire inch mesh or heavier b Design of guards 1 Where it is necessary to change belts make adjustments or apply oil or grease guards shall have hinged sections or be removable 2 Guards shall be designed so as not to interfere with the usual machine operations but give the max- mum protectiotno the operator c Methods of manufacture 1 Filler material shall be expanded metal sheet or perforated metal or wire mesh and be securely : fastened to frame 2 By welding to frame every 4 inches By weav- ing through channel or angle frame or if No. 14 gauge 4 inch mesh or heavier is used by bending entirely around rod frames $ Where openingisn pipe railing are to be filled in with expanded metal wire or sheet metal the filler material shall be made into panels with rolled edges or bound with y or U edging of No. 24 gauge or beavier sheet metal fastened to the panel with bolts or rivets spaced not more than 5 inches to center cen- ter The bound panels shall be fastened to the railing by metal clips spaced not more than 5 inches center to center 4 Where the guaofrgd uarsds requires filled mate- rial of greater area than 12 square feet additional frame members shall be provided to maintain panel 5 All joints of framework shall be made equiva- lent in strength to the material of the frame Section 50-204.180 Disk shield and U guards ^ Disk guard A diak guard shall consist of a metal disk not less than No. 22 gauge fastened by U balts or rivets to spokes of pulleys flywheels or gears Where possiobf cionltaict twiyth sharp edges of the disk exists the edge shall be rolled or wired In all cases the nuts shall be provided with lock outs REGULATIONS PART 80-204 17 which mall be placed on the unerposed side of the wheel b Shield guards 1 A shield guard shall consist of a frame filled in with wire mesh expanded perforated or solid sheet metal 2 If area of shield does not exceed 6 square feet the wire mesh or expanded metal may be fastened in a framework of inch solid rod inch x 14 inch x inch angle iron or metal construction of equivalent strength 3 Metal shields may have edges entirely rolled around a inch solid iron rod All material of shield guard shall meet the requirements of section 50-204.181 c U Guards A U guard consisting of a flat sur face with edge members shall be designed to cover the undersurface and lower edge of a belt multiple chain or rope drive It shall be constrou f c mat tereiad ls specified in table of section 50-204.181 and shall conform to the requirements of sections 50-204.183 and 50 204.184 Edges shall be smooth and if size of guard requires these edges shall be reinforced by rolling wiring or by binding with angle or flat iron Section 50-204.181 Approved materials 3 Minimum Requirements The materials and dimensions specified in this section shall apply to all guards except horizontal overhead belts rope cahle or chain guards more than 7 feet above floor or plat form For the latter see table following section 50-204.184 TABLE OF STandaro MatTERIALE AND DENTIONS Material Clearance from moving part st ali point mesh or opening allowable Minimum gauff U.S. standard er thickne Minimum height of guard from Boor or platforma level wire Woven wire sereeeee veer Under cs eseness 4 . ese Under : Expanded meta eacrecvenee Perforated metal 0. cece . eeeee Sheet metal ... cc. cee eee ese sees -1-133 hens Under4 . " . Under ( Under : Under . Under " Wood or metal strip crossed -1-15 5 eee 7 0 7'0 7'0 7'0 7'0 wed 7'0 7 0 : 7'0 | 7'0 7'0 70 7'0 Under . Wood or metal strip not crnsed..... -15 " " width .. see Wood No. 16. . Standard rail es ees ccceeevecee MaMaz . See Standard for Railings Section 204.185 1370 70 b Framework 1 Minimum dimensions of material for the frame- work of all guards except as noted in subparagraph 5 of this paragraph shall be angle iron 1 inch x 1 inch ^ ...inch metal pipe of 4 inch inside diameteorr metal construction of equivalent strength 2 All guards shall be rigidly braced Every 3 feet or fractional part of their beight to some fixed parotf mach or bi uiln dingemrr ucty ure Where guard is ex- posed to contact with moving equipment additional 3 The framework for all guards fastened to floor or working platform and without other support or bracing shall consist of 1inch x 1inch inch angle iron metal pipe of 1inch inside diameter or metal construction of equivalent strength All rec- tangular guards shall have at least 4 upright frame members each of which shall be carried to the floor and be securely fastered thereto REGULATIONS 30 104 Kards shall have at least 3 sup- porung members carried to Boor 5 Guards thirty inches or less in height and with a total surface not in excess of ten square feet may have a framework of inch solid rod ...inch x inch x inch angle or metal construction of equivalent strength The filling material shall correspond to the requirements of the table contained in paragraph a of this section c The specifications given in paragraphs a and b of this section are the minimum requirements where guards are exposed to unusual wear deterioration or impact beavier material and construction shall be used to protect amply against the specific bazand~- involved Section 50-204.182 Wood guards a Wood guards may be used in the woodworking and chemical industries in industries where the pret ence of fumes or where manufacturing conditions would cause the rapid deterioration of metal guards also in construction work and in locations outdoors where extreme cold or extreme heat makes metal guards and railings undesirable In all other indus- tries wood guards will nobte allowed ; b Material and construction 1 Wood shall be sound tough and free from any loose knots 2 Guards shall be made of planed lumber not less than one inch rough beard measure and edges and corners rounded off 3 Wood guards shall be securely fastened to- gether with wood screws hard wood dowel pins bolts or rivets 4 While no definite dimensions are given under this heading for framework or filler materials wood guards shall be equal in strength and rigidity to metal guards specified in section 50-204.181 b c 5 For construction of standard wood railing see acction 50-204.185 Section 50-204.183 beits Guards for horizontal overhead * Guards for horisontal overhead belts shall run the entire length of the belt and follow the line of the pulley to the ceiling or be carried to the nearest wall thus enclosing the belt effectively Where belts are so located as to make it impracticable to carry the guard to wall or selling construction of the guard shall be such as to enclose completely the top and bot- tom runs of belt and the face of pulleys See section 50-204.163 b and c b The guard and all its supporting members thall be securely fastened to wall or ceiling by gimlet- point lag screws or throuboglhts In caseof masonry construction expansion bois shall be used c Suitable reinforcement shall be provided for the ceiling rafters or overhead floor beams where much is necessary to sustain tafely the weight and stress likely to be imposed by the guard $= The interior surface of all guards by which is meant the surface of the guard with which a belt will come in contact thall be mnooth and free from all projections of any charactes except where construction demands it protruding shallow round rivets may be used Overhead belt guards shall be at least quarter wider than the belt which they protect except that this clear ance need not in any ease exceed 6 inches on each side Overhead rope drive and block and chain gua shar ll d be s not less than 6 inches wider than the drive on each side In overhead silent chain guards where the chain is held from lateral displacement on the sprockets the side clearances required on drives 20 inch centers or under shall not be less than ...inch from the nearest moving chain part and on drives of over 20 inch cen- ters a minimum of inch from the nearest moving chain part d The table following section 50-204.184 gives matoef rmaitearilalss to be used and general construction of guards for belts 10 inches or more in width No material for overhead belt guards should be maller than that specified in this table for belts 10 to 14 inches wide even if the belt is less than 10 inches in width However No. 20 gauge sheet inetal may be used as filler on guards for belts less than 10 inches wide Expanded metal because of the sharp edges shall not be used as a filler in borizontal belt guards e For clearance between guards and belts ropes or chains of various center to center dimensions be- tween the shafta see bottoomf table following section , ys 50 204.18504 204.184 Section 50-204.184 Guards for horizontal overhead rope and chain drives Overhead and chain guard construction shall conform to section 50-204.183 for overhead belt guard construction of similar width except that the REGULATIONS 60-30 19 She ce. de solid type as shown in table followuig acction 50 204.181unless the fire hazard demands the use of open construction A side guard member of the same solid filing material shall be carried up in a vertical position 2 inches above the level of the lower run of the rope or chain drive and 2 inches within the periphery of the pulleys which the guard encloses thus forming a trough These side filler members shall be reinforced on the edges with 1inch x inch Bat steel riveted to the filling material at pot greater than 8 inch centers the rein- forting strip shall be fastened or bolted to all guard supporting members with at least one inch rivet or bolt at each intersection and the ends shall be se- cured to the ceiling with lag screws or both The filling materials shall be fastened in the framework of the guard and the filler supports by inch rivets spaced on inch centers The width of the multiple drive shall be determined by measuring the distance from the outside of the first to the outside of the last rope or chain in the group accommodated by the pulley Section 50-204.185 Guard rails and toe boards Guard rails shall be 42 inches in height with mid between top rail and floor b Foru shall be not more than 8 feet aparthtey to be are permanent and substantial smooth and free from protruding nails bolts and splinters If made of pipe the post shall be 1inches inside diameter or larger If made of metal shapes or bars their secuon eqbu e eqa uallin str to e thatnfg 1t by h 1by inch angle iron If made of wood the posts shall be 2 x 4 larorgle argr er The upper rail shall be 2 ^ 4 inch oretwso 1 x 4 strips one at the top and one at the side of posts The mid shall be 1 x 4 inches or more The rails metal shapes metal bars or wood shall be on that ride of the posts which gives the best protection and support Where panels are Eitted with expanded metal or wire mesh as noted in table section 204.181 the middle rails may be omitted Where guard is exposed to contact with moving equip ment additional strength may be necessary e Toe boards shall be 4 inches or more in height of wood metal or of metal grill not exceeding 1 inch mesh MISCELLANEOUS MACHINE GUARDING Section 50-204.190 machines Lathes and automatic screw a Chucks and face plates shall be free from pro- jections and dogs if used shall be of the safety type circular in shape with no projections beyond the periphery b Chip guards to catch flying chips particularly in the case of the high speeds used in the softer metals shall be provided c Routing mock in turret lathes and automatic screw machines shall be completely enclosed in pipe long enough to contain the longest stock used d Suitable shields and oil catchers shall be pro- vided to prevent slipperiness from oil thrown from the automatic screw machines Section 50-204191 Drill presses a All projections on the rotating spindle and as much as possible of the spindle itself should be guarded ; b Spindle drive belts when in range of the opera- tor's head or body thall be guatorprd otee ct tdhe operator from both contact and breakage Section 50-204.192 Planers and shapers metal a The spaces between the ways of planer framS shall be filled in smoothly with beavy sheet metal to eliminate the shear hazard b Where there is not a inch clearance between a fixed object and the planer table and the work carried on the table a railing shall be provided between the fixed object and the table and the work on the table to protect workers passing between the fixed ob- ject and the planer Section 50-204.193 Shears a Alligator shears shall be guarded by running a heavy shaped metal strap horizontally around the moving upper jaw with the lower edge of the strap enfoaruengouh gh above the cutting edge of the fixed lower jaw to allow the material to be inserted in the shears b Squaring shear shall be provided with a fixed barrier which clears the top of the table by not more than 1 inch plus the minimum thickness of material for which wed Automatic clamps shall be accept- able as guards when cutouts are filled in so that fingers of the operator cannot enter the danger moe 20 REGULATIONS 80-201 GUARD REQUIREMENTI FOR HORIZONTAl Overhead Belt 'Ropel and Chade 7 Flzt ok Morz Above Flook or Platform Member Other 10 to it inal Width Over 14 to 24 incl Over 24 Katrial Katrial Framework .. 2... eee cece cece Filler belt guards 000 eee ...... Filler and vertical side member Filler supportos es s ce cc ee ce ease Guard supports .. eee eee IK ... 2 2 44 K ..... | Angle iron "a Ke .. 2 " Flatiron No. 20 A.W.G ] No. W.G 1] No. 18 A.W.G Solid sheet metal 2 x i 6 ron } 2 ... iron J 4 24 ...Flat and Angle angle x " 2 " angle | Flatirea Flatirea PASTENINCS F^...llersupports to framework ] Filler fua to apports belt guards Filler to frame and support cope | and chain guards Guard supports to framework Guard and supports = overhead | ceiling 2 { cee ec ee es 1 Ki K. rivets spated | 2 1 ... eee eee woh oe eee eee " on centra sides and 2 eee cece acrews 2 ** screwsscrews | 34 lag acrews or " bolo 36 x 4 lag screws or 6 bolu K ccc ccewceees 2 " wee oo) 4 centers on bonoth 2 *. = | x " lag sOTOWI or " bolu Riveux Flush rivers of Rivebrolsu Lag Krew or balts DETARACING DETARACING DETARACING ETC. Width of guards se e eenne ee qu arter wider than belt rope or chain drive Spacing between filler supports 20" C. to ....... C. to ... 16C. Spacing between filler fat belt2 belt2 " apart 2 apart 3 part guards Spacing between guard sapports 36 to ...... C. C. eceres 35 to C. ees. OTICA SELT GUARD FALLING PERMITTED Sbeet metal fastened as in rope and ] No. 20 A.W.G chain guards Woven wire m e oo.s se cech ee eel No. 12 AW.C No. 18 A.W.G No. 10 AW.G No. 18 A.W.G No. A.W.G Solid or perforated CLEARANCE FROM O^ TUDEOF BELT ROPE OR CHAIN DELIVE TO QUARD Distance center to center of shaft Up to 15 ind Over 15 to 23ind Over 25 to 40 incl Over 40 Clefra om r belta ron pe oc r ce ha^fin| " 10 eececen ind 15 " 20 to guard Section 50-204.194 Guillotine cutters power- a driven guillotine cutters shall be a will equipped guagruad rd or device preveprnet vent hands of the workers from entering the zone traveled by the knife while the knife is in motion This may a fixed barrier or it may consist of a handed device requiring the simultaneous use of the worker's two hands at points outside the zone of danger b In addition to the point of operation guard or device described in section 50-204.194 the driven guillotine cutter shall be provided with an arrangement which will prevent the cutter from = making a second stroke until the lever or handed = dev is ai gaincuse ed . Section Section 50-204.195 Power presses a Safeguarding classification One or more means of safeguarding the press at the point of opera- . REGULATIONS 50-306 ' 21 tion shall be provided and wed on every power press depending upon the method of feeding in accord- and working surface shall not be greater than those ; shown in the Table below ance with the following PERMISSABLE OPENDIOS INCRES Maximum SAFEGUARDING CLARIFICATICOLARIFNICATION Afshand of footing press Automatic food Aummatic roll feed Auto- matic push pull or dial feed Semiautomatic feed Chute feed both gravity and follow feed Safeguarding required Fixed barrier guard or gatc 9 guard section 50-204.195 e d Fixed barrier guard 9 guard section 50 c d or gate 204.195 Slide or push feedi Sliding die Dial feed Revolving dies | Manual feed Fixed barrier guard of gate guard hand tripping device or pull guard electronic sweep guard ction 50-204.195 c d e ^ ^ h Distance of opening from nip paint % to % 1to % % to % % to 5w 6 % to 7 % to % width of opening A * w% * M a K 1 4 For the portion of the guard between the operstor and the die or working area it is required that inch minimum vertical steel rods vertically slotted material or thatterproof nonfammable transparent material be used Mesh or perforated plate shall not be used between the operator and the die 5 Any hinged or movable section of a fixed bar- rier guard shall be connected to an interlocking device that will prevent tripping the press while the sec- b General requirements for point of operations guarding Every point of operation guarding device shall be timple and reliable in construction application and adjustment It shall be permanently at- tached to the press or the die It shall not offer any accident hazard in itself 1 The device shall be designed and constructed so that it is impossible for the operator to place or permit his hand orremta o ri eman in within the dan- ger zone created by the movement of the ram 2 Care shall be used in the selection of the method of guarding for each particular job Guards shall be installed maintained and adjusted to produce safe operation at each setting of the prem . 3 Guards which are attached to the ram and which move downward so that the operator's hand or fingers might be caught between gate and lower die shall not be used c Fixed barrier guard 1 A fixed barrier guard is an enclosure to prevent the hands or fingers of the operator from entering the area between the dim It may be attached to the press or individual guards may be attached to the dies 2 There shall be no exposed shear points between , tion is open d Gate guards 1 A gate guard is a movable barrier arranged so that it completes the enclosure of the point of operation before the operating clutch can become engaged . - 2 Openings in the barrier of the gate guard shall be not greater than those specified for the openings ^fin fixed barrier guards in section 50 204.3195 The mechanism of the guard shall be designed so that thwe illr bee no positive linkage or other close mo- tion which may trap the hand of the operator 3 Gate guards shall include either fixed or mov- able side enclosures around the die 4 When the speed of the ram is so slow that an operator might beat the ram on the down stroke after the press has been tripped the gate guard shall be designed so that the gate remains closed until the ram has completed the down stroke e hend tripping device ( hand tripping devices include anly those which make it im- possible to trip the press without the simultaneous use of both hands out thes dai nged r zoe ne It shalble designed located and arranged so as to prevent tying wedging or otherwise securing one handle or button or operating it with any gesture or device and tripping the press while the other hand may be in the danger the guard and any moving part 3 Openings in the guard or between the guard zone. 2 On operated prones the con- REGULATIONS 10-204 - trois shall be arranged so that if any hand is removed from a control during the down stroke of the ram it will be instantly stopped 3 Where two or more persons are engaged in the operation of a single press separate hand controls shall be provided for each person except that an audiliary foot control air or electric may be used in the sweearpm and press tie rods die straps or other partosf the press or guard ) hand tripping device Whenever a press is set up so as to require tripping the ram or plunger by one hand additional guarding as specified in sec- tion 50 204.19s5hall be provided j Special hand toolt Hand tools for placing and beu of one act of hand controls provided the foot control is located 10 that the nip point is out of the reach of the operator but the foot controls shall in no removing mat^rialshall be ruch as to permit easy han- dling of material without the operator's placing a hand in the danger one Such tools shall not be accepted case be less than a distance of 36 inches measured horizontally from the nip point in lieu of other guarding as provided in this sec tion f Pull guards ) Pull guards shall be so constructed as to be attached to the operator's hands or arms and connected to the ram plunger or outer slide of the press in such a way that the operator's hands and fingers will be withdrawn from the danger zone before the ram plunger or outer slide descends to a hazardous point 2 Where the open distance between the top of the work and the lower extremity of the punch is less than 2 inches the multiplying action of this guard shall be such that the hands will be withdrawn a safe distance before this open distance is ...closed g Electronic safety device 1 An electronic safety device shall be so designed and installed that when the operator's hand or any part of the body is in the die zone the press cannot be tripped and if the hand or any part of the body is inserted while the ran is in a downward motion it will immediately stop the 12.DD 2 These guards shall be operated from a circuit wired so that interruption of the electric current will automatically prevent the press from tripping until the current has been restored 3 Electronic safety devices shall not be used on positive clutch presses where the ram continues for a complete stroke after each tripping of the prem h Sweep guards ) Sweep guards may be provided with either single or double sweep arms The rweep arm or arms shall be connected to the ram in such a way as to forcibly sweep the hanofdts he operator from the die zone as the ram or plunger descends and before there is danger of injury 2 Sweep guards shall be so designed and oper- ated that the operator cannot reach behind the guard in the danzog ne e befr ore the ram has completeidt downward stroke 3 The sweoresp weesps ofnfoteofr fer any bazard of or in themselves by creating a shear hazard between Section 50-204.196 Foot preses Foot presses shall be guarded by one or more of the guards describeidn section 50 inclusive 204.192 5 to d * Fized barrier guards Fixed barrier guards shall conform to section 50-204.195 c b Limitation of stroke If a foot or kick pres is guarded by limitation of the ram stroke the adjustment must be set and locked securely in position to limit the maximum travel of the ram to inch on each stroke There shall be no pinching or crushing hazards between other parts of the ra or m die shoe c Gate guards A gate shall be designed to close the openings at the front of the press before the foot . lever can be operated d hand operation hand operations shall conform to section 50-204.195 - . c Sweep guards Sweep guards shall conform to section 50-204.195 f Pull guards Pull guards shall conform to section 50 204.19 5 g Location Foot presses shall not be located in a position which will permit the operating lever to extend into an aisle or passageway b Mounting Foot secshuallrbeesel cury ely bolted to the floor Section 50 204.197 Other power safety devices a Treadle guard A substantial guard thall be placed over the treadle of every operated power press prevent accidental tipping b Foot treadle The use of tension springs or counterweights on any treadle shaft or tension springs on any treadle level is prohibited c Latch or operating lever Hand ated power presses shall be equipped with a spring latch on the operating lever to prevent accidental or premature tripping REGULATIONS 60-306 23 " a ocking device Each operated if power press tended by more than one person at one time shall conform to the requirements of section 50-204.195 1 and 3 c Single #tachments Ou positive clutch presses a stroke attachment shall be provided by which the treadle or operating lever is dis- connected after each stroke Section 50-204.198 Platen presses Platen presses shall be provided with an automatic feed device an automatic stop device a guard gate or sweep motion device or another device all as defined in this section . a An automatic feed device is one which does not require the operator's hand to be placed between the platen and bed b An automatic stop device is one which will prevent the plates from closing if the band or hands of the operator are caught between the platen and the bed c A guard gate or sweep motion device is one which will throw the operator's hands out of the way before the press closes If the guard is of the type which lifts the hands out of the danger zone it shall rise at least 4 inches above the platen before the press closes The guard shall be arranged so that it will pre- vent a shear between the guard and the top of the platen d Another device is one that will prevent the platen from closing on the operator's hands before are removed from between the platen and the bed Section 50-204.199 Abrasive wheels ' a The machine shall be securely mounted on sub- stantial floors benches foundations or other adequate structures b Guards Every stationary abrasive wheel and portable wheel used in stationary position shall be equipped with a hood or band guard strong enough to withstand the shock of a bursting wheel A guard of this type shall be useusd ed on every portabwhleeel where the nature of the work will permit c Spindle The spindle and nut and flange pro- jection if any shall be guarded d Mountings and fastenings Hoods shall be mounted so as to maintain proper alignment with the wheels and the strength of the fastenings shall exceed the strength of the bood e Dust exhaust provisions Hoods on machines used for dry grinding and other operations where dust is produced shall have provisions made for connection to an exhaust system f Work rests Work rests shall be kept adjusted close to the wheel with a maximum distance of 1/8 inch to prevent the work from being caught between the wheel and the rest Section 50 204,200Revolving drums and cylinders Every revolving barrel drum or other revolving con- tainer shall be guarded by an enclosure whicihs inter- locked with the driving mechanism so that the barrel or drum cannot revolve unless the guard enclosuries in place Section 50-204.201 Fans When the periphery of the blades of a fan is less than 7 feet above the floor or working level the blades shall be guarded WOODWORKING MACHINERY Section 50-204.208 Circular table saws a Guards Each circular saw thall be guarded by a hood which shall completely enclose that portion of the saw above the table and shall be arranged so that the hood will automatically adjust itself to the thickness of and remain in contact with the material being cut Where there is a possibilitoyf contact with a portion of a circular saw or beneabethih nd the naw table that portion shall be covered with a guard to prevent accidental contact with the saw b Spreaders Each circular ripsaw shall be furnished with a spreader to prevent material from squeez- A ing the saw or being thrown back on the operator spreader need not be used for work which is restricted to grooving dadoing or rabbeting c kickback fingers or dogs Each circular rimaw shall be provided with kickback fingen or dogs so located as to oppose the tenodr e ten ndc eny cy of the saw to pick up the material or to throw it back toward the operator Section 50-204.209 Swing and sliding cut MANS The requirements expressed in this section apply to all swing cut saws and to those sliding cutoff saws which are mounted abo thev tae ble 1 Hood Each of the raws to which this section applies shall be provided with a bood that shall 24 REGULATIONS PART 60-204 completely enclose the upper half of the mw the arbor end and the point of operation at all positions of the saw The hood shall be constructed in such c kickback fingers or dogs Each radial saw used for ripping shall be provided with kickback fingers or dogs located on both sides of the saw so a manner and of such material that it will protect the operator from flying splinters and broken saw teeth It shall be designed so that it will automatically cover the lower portion of the blade so that when the saw is returned to the back of the table the hood as to oppose the thrust or tendency of the saw to pick up the material or to throw it back toward the oper ator d Adjustable stops and return devices An adjurtable stop shall be provided to prevent the for- will rise on top of the fence and when the saw is moved forward the hood will drop on top of and ward travel of the blade beyond the position necestary to complete the cut in repetitive operationa rumain ^fin contact with the table or material being Section 50-204.212 Portable circular saws CL b Counterweights Each of the saws to which this section applies shall be provided with an effective device to return the saw automatically to the back of the table when released at any point in its travel c Limit stops Limit chains or other equally effective devices shall be provided to prevent the saw from swinging beyond the front or back edges of the table d Latches A latch or equivalent device shall be provided to prevent the saw from rebounding upon its All portable power saws shall be equipped with guards above and below the base plate or shoe The upper guard shall cover the saw to the depth of the teeth except for the are required to permit the titl o bt e te iltd ed The lower guard shall enver the raw to the depth of the weth except for the minimum art required to allow proper retraction and contact with the work When the tool is withdrawn from the work the lower guard shall automatically and instantly return to covering position return to the rear of the table Section 50-204.219 Band saws and band resaws Section 50-204.210 Inverted swing cut s2ws jump saws Inverted swing saws shall be provided with a hood that will cover the part of the saw that pro- trudes above the top of the table or above the mate- rial being cut It shall automatically adjust itself to the thickness of and remain in contact with the mate- a Enclosing bond blades All portions of the saw blade shall be enclosed or guarded except for the working portion of the blade between the bottom of the guide rolls and the table Band wheels shall be fully encased The outside periphery of the enclosure shall be solid The front and back of the band wheels shall be either enclosed by solid material or by rial being cut Section 50-204.211 Radial saws a Hoods and guards The upper hood shall com pletely enclose the upper portion of the blade down to a point that will include the end of the saw arbor The upper hood shall be constructed in such a manner and of such material that it will protect the operator from flying splinters broken saw teeth etc. and will defiect sawdust away from the operator The sides of the lower exposed portion of the blade shall be guarded to the full diameter of the blade by a device that will automatically adjust itself to the thickness wire mesh or perforated metal Such mesh or perforated metal shall be not less than 0.037 inch US Gauge No. 20 and the openings shall be not greater than be inch Solid material used for this purpose shall be of an equivalent strength and firmness The guard for the portion of the blade between the sliding guide and the upper guard shall protect the operator from the saw blade at the front and outer side Brakes shall be provided to stop the wheel in case of b Tension Each band machine shall be provided with a tension control device to indicate a proper of the stock and remain in contact with stock being cut to give maximum protection possible for the oper- ation being performed b Spreaders When radial saws are used for rip- ping a spreader shall be provided for meeting the requirements expressed in section 50 204.208 tension for the standard saws used on the machine c Feed rolls Feed rolls of hand resawi shall be protected with a guard to prevent the hands of the operator from coming in contact with the ruaning poati anyn pot int ALGULATIONS 50-304 25 Section 50-204.214 Jointers 1 Point of operation 1 Each hand planer and jointer with horizontal bead shall be equipped with a cylindrical curting head the knife projection of which shall not exceed inch beyond the cylin- drical body of the head 2 The clearance between the edge of the reas table and the tuner head shall be not more than inch The table throat opening shall be not more than 2inches when tables are set or aligned with each other for zero cut b Automatic guards ) Each band jointer with a horizontal cutting bead shall have an automatic guard which will cover all the section of the head on the working side of the fence or gage The guard shall keep the operator's hand from c^mingin contact with the revolving knives The guard shall automatically adjust itself to cover the unused portion of the head and remain in contact with the material at all times 2 Each hand jointer with horizontal cutting bead shall have a guard which will cover the section of the head back of the gage or fence 3 Each wood jointer with vertical head shall have either an exhaust hood or other guard so ar ranged as to enclose completely the revolving bead except for a slot of such width as may be necessary and convenient for the application of material to be jointed Section 50-204.215 Wood shapers hand panel raisers and similar machines a The cutting heads of each wood shaper handfed panel raiser or other similar machine not automatically edshall be enclosed with a cage or adjust- able guard designed to keep the operator's hands away from the cutting edge The diarneter of circular shaper guards shall not be less than the greatest diameter of the cutter In no case shall a warning device of leather or other material attached to the spindle be acceptable b Cylindrical heads shall be used whenever the the nature of the work will permit c All spindle shapers shall be provided with a starting and stopping device for each spindle Section 50-204.216 Planing molding sticking and matching machines covby e a mer tale gud ard If such guard is constructed of sheet metal the material used shall be not less than He inch in thickness and if cast iron is used it shall be not less than inch in thickness b Where an exhaust system is used the guards shall form part or all of the exhaust hood and shall be constructed of metal of a thickness not less than that specified in paragraph 2 of this section Feed rolls shall c be guarded by a hood or suitable guard to prevent the hands of the operator from crim- ing in contact with the running rolls at any point The guard shall be fastened to the frame carrying the rolls so as to remain in adjustment for any thickness of stock d Surfacers or planers used in processing multiple pieces of material simultaneously shall be provided with sectional infeed rolls having sufficient yield in the con- struction of the sections to provide feeding contact pressure on the stock over the permissible range of variation in stock thickness specified or for which the machine is designed In lieu of such yielding sectional rolls suitable section kickback finger devices shall be provided at the infeed end Section 50 204.217Sanding machines a Feed rolls Feed rolls of feed sanding machines shall be protected with a cylindrical guard to prevent the hands of the operator from coming in contact with the running rolls at any point The guard shall be constructed of heavy material firmly secured to the frame carrying the rolls so as to remain in adjustment for any thickness of stock The bottom of the guard shall come down to within inch of a plane formed by the bottom or contact face of the feed roll where it touc thh e se tos ck b Drum sanding machines Each drum sanding machine shall have an exhaust bood or other guard arranged to enclose the revolving drum except for that portion of the drum above the table if a table is used c Disk sanding machines Each disk sanding ma- chine shall have the exhaust hood or other guard if no exhaust system is required arranged to enclose the revolving disk except for that portion of disk above the table if a table is used d Belt sanding machines Belt sanding machines shall be provided with guards at each nip point where the sanding belt runs on to a pulley The unused run a Each planing molding sticking and matching of the sanbd eltishn allgbe guarded against accidental machine shall have all cutting heads and saws if used contact 26 REGULATIONS 50-204 HOUSEKEEPING Section 50-204.229 General All phases of employment passageways storerooms and service rooms shall be kept clean and orderly and in a sanitary condition Section 50-204.230 Floors * Floors of every workroom shall be maintained in a clean and so far as possible a dry condition Where wet processes are used drainage shall be maintained and false floors platforms mats or other dry standing places should be provided where practicable b Cleaning and sweeping shall be done in such a manner as to minimize the contamination of the air with dust and so far as is practicable should be done outside of working hours c Every floor working place and passageway shall be kept free from protruding nails splinters boles or loose boards Section 50-204.231 Flammable materials Oily rags oily waste waste paper and other flammable and combustible material shall be stored in tightly closed metal containers Magnesium and other flammable metal scraps thall not be mixed with other scrap All flammable scrap material of any kind shall be removed from the work areas daily Section 50-204.232 Tools and other materials Tools materials or debris shall not be strewn about in a manner whi mayc cah use tripping or other hazards Section 50 204.233 Receptacles for water disposals Any receptacle used for decaying solid or liquid waste or refuse shall be so constructed that it does not leak and may be conveniently and thoroughly cleaned and it shall be maintained in a sanitary condition Such a receptacle shall be equipped with a fitting cover Section 50-204.234 Sweeping and refuse removal All sweepings solid or liquid waste refuse and garbage shall be removed in such a manner as to avoid creating a nuisance or menace to health and as often as necessary to maintain the place of employment in a TOILET FACILITIES AND WASH ROOMS Section 50-204.239 Separate toilet for each s Every place of employment shall be provided with adequate toilet facilities which are separate for each sex Section 204.240 Location Toilet facilities shall be provided so as to be readily accessible to all employees Toilet facilities so located that employees must use more than one floor flight of stairs are not considered as readily accesible Section 50-204.241 Water closets Water closets or chemical closets or privies where permitted by local law shall be provided for each sex and shall be in accordance with the following table The protvo i be d proe vidd ed for each sex shall in every case be based on the maximum number of persons of that sex employed at any one time at work on the for which premises the facilities are furnished When persons other than employees are permitted the use of toilet facilities on the premises a reasonable allowance shall be made for such other persons in computing the minimum number of toilet facilities required 2 Number of persons to 10 to 24 25 to 49 50 74 75 to 100 Over 100 * 1 for each additi 30opn ersa^ TlZLI Minimum number of facilitias 1 2 3s 4 5 e) Where 10 or more are employed one water closet less than the number specified in the foregoing may be provided for men for each urinal except that the num- ber of water closets in such cases may not be reduced to lem than thirodf tshe number specified in the foregoing Two feet of trough urinal shall be considered as equivalent to one individual urinal b An adequate supply of toilet paper with bolder shall be provided for every water closet c Covered receptacles shall be kept in all toilet rooms used by women REGULATIONS PART 10-204 27 Section 50-204.242 Construction of toilet rooms a Each toilet facility closet shall occupy a separate compartment equipped with a door latch and clothes book b The walls of compartments or partitions be- tween fixtures may be less than the height of room walls but the top shall not be lets than six feet from the floor and the bottom not more than one foot from the floor c The door to every toilet room shall be fitted with an effective closing device and the entrance to the toilet rooms shall be so screened that the interior every 15 workers or portion thereof exposed to exces sive beat or to skin contamination by poisonous in- fectious or irritating material d Individual hand towels or sections thereof of cloth or paper or mechanical apparatus for drying the hands shall be provided Proper receptacles or other sanitary means shall be maintained for the disposal of used towels Towels for common use shall not be . provided c Adequate washing facilities shall be provided in every toilet room or adjacent thereto Section 50-204.245 Change roami of the toilet room is not visible from the workroom d The Boors walls ceilings partitions and doors of all toilet rooms shall be of a finish that can be easily cleaned e Toilet rooms except those in work places accessible to men only shall be completely enclosed with solid material that is nontransparent from the out- Separate change or dressing rooms shall be provided for each xx wherever it is the practice to change from street clothes or wherever it is necessary to change be- cause the work performed involves exposure to excessive dirt heat fumes vapor or moisture Where change rooms are not provided facilities shall be fur- nished for hanging outer garment side Section 50-204.243 Chemical closets and privies When chemical closets or privies are permitted by Jocal law they shall be of a type approbvyethde health authorities having jurisdiction and shall be maintained in a sanitary condition Section 50-204.244 Washing facilities a Where employees work clothes are exposed to contamination by poisonous infectious or irritating material facilities shall be provided in thange rooMI so that street and work clothes will not be stoirn e cod n- tact with each other worker b Where the process in which the worker is engaged is such that his working clothes became wet or have to be washed between shifts provision shall be Adequate facilities for maintaining personal cleanliness shall be provided every place of employment These shall be convenient for the employees for whom they are provided and shall be maintained in a sanitary condition a At least one lavatory wash basin with adequate hot and cold water shall be provided for every 20 employees men or women or portion thereof up to 100 persons and one lavatory wash basin for each additional 25 persons or portion thereof Twenty inches of sink with individual faucet shall be con- sidered as equal to one lavatory In all instances a suitable cleansing agent shall be provided at each wash place b Where employees are exposed to skin con- tamination by poisonous infectious or irritating material one lavatory supplied with hot and cold water shall be provided for every 5 employees c One shower bath with ample supply of bot and cold water from one fixture shall be supplied for made to insutrhaet such clothinigs dry before use Section 50-204.246 Retiring rooms for women Where 10 or more women are employed at any one time at least one retiring room shall be provided a Where less than 10 women are employed and a retiring room is not furnished some equivalent space shall be provided which can be properly screened for privacy and made suitable for the use of women em- in couch ployect b At least one couch or bed shall be provided in every place where women are employed The number such beds of or couches required shall be as follows Beds : I 1 ts 100_ 2 100 to 230 1 additional bed for each additional 250 wamen em- ployees A minimum of 60 square feet per bed shall be provided 28 REGULATIONE 50-204 LUNCH ROOMS AND FOOD HANDLING Sectics 50-204-251 Location In all places of employment where employees lunch on the premises an adequate space suitable for that purpose shall be provided for the maximum number of employees who may use such space at one time Such space shall be separate from any location where there is exposure to toxic materials Section 50-204.252 Waste food disposal A covered receptacle shall be provided and shall be used by employees for the disposal of a waste food Section 50-204.253 Presence of toxic materials No employee shall be permitted to store or eat any part of his lunch or other food at any time where there are present any toxic material or other substance that may be injurious to bealth DRINKING WATER Section 50-204.258 Potable water a An adequate supply of pozable water approved as to source and distribution by appropriate authority shall be provided for drinking washing and cooking purposes in all places of employment b In all instances where water is cooled by ice made from potable water the construction of the container shall be such that the ice does not come in direct contact with the water c Open containers such as barrels pails or tanka for drinking water from which the water must be dipped or poured whether or not they are fitted with ' cover shall not be allowed d The common drinking cup is prohibited e Where single service cups are supplied a saritary container for the unused cups and a receptacle for disposing of the used cups shall be provided Section 50-204.259 potable water Outlets for potable water such as water for industrial or fighting purposes only shall be posted to indicate that the water is unsafe and is not to be used for drinking washing or cooking purposes MEDICAL SERVICES Section 50-204.264 Medical services a The employer shall atsure the ready availability of qualified medical personnel for advice and consultation on plant health problems for emergency medical services and for the supervision of first attendants b In the absence of an infirmary a person trained to render fust aid and a kit containing the following items shall be available at every place of employment 1 Adhesive Plaster x 5 yd Roll 1 Adhesive Planter 1 x yd Roll 2 Absorbent Cotton ounte packages 1 Absorbent Gauze 1 yd 1 Actival Samp ounce bottle 100 Adhesive Bandage 1 Aromatic Spirits of Ammonia ounce 1 Boric Acid Solution ounce bottle 1 Castor Oil ounce bottle 12 Compres Bandages 2" 4 Compres Bandages bordle 12 Cotton Wound Applicators 1 Eye Cup 1 Eye Dropper 6 Finger Cots 6 Folle for Burns 4 oz tubes 1 Foille for Burns ounce bottle 6 Gauze Roller Bandages " - 6 yds 6 Gauze Roller Bandages x 6 yds 6 Gauze Roller Bandages 3 x 6 yds 10 Cause Sterilized 12 z 18 1 Merthiolate Tincture ounce bottle 1 Medicine Glam 1 Manual First Aid Instruction Scissors Pair Bandage 1 Tweezers Pair ... 12 Safety Pins 1 Spoon 1 Tourniquet 2 Triangular Bandages 40 6 Wood Splints for Fractures 12 Wood Tongue Depressors EYE PROTECTION Section 50-204.269 General requirement Eye protection shall be provided where persons are exposed to any hazard which may cause injury to the eyes from the following operations chipping talking coarse grinding riveting sledging scaling light grinding stone dressing spot welding woodworking metal- REGULATIONE 50 204 29 working habbirting casting dipping in hot metal baths handling of acids and caustics elecatrerwi elc d- ing quyacetylene and gxyhydrogen welding and cutting furnace tending and irradiation with ultraviolet light Section 50-204.270 First for chemical burns Where workers eyes may be exposed to injurious = chemical materials such as acids caustics etc. suit able facilities for quick dreaching or flushing of the eyes shall be provided within the workroom for im- mediate emergency use ENVIRONMENTAL CONDITIONS Section 50-204.275 Toxic gases vapors fumos dusts and mists No employee shall beexposed to any of the gases vajors misi dusts or fumes on the lisitn section 50 204.276 which exceed the limits there stated when ap- Gases and Substance . Parts million parts valume Milligrams meter cubic plied to him on an average basis for an eight hour workday unless be is protected therefrom by respitrhae- tion equipment approvaepdproved for the purpose by - United States Bureau of Mines of the United States Department the Interior accordance with the recommendations of its manufacturer Ex- posures without such equipment which exceed such limits temporarily without exceeding them on a daily average basis or which involve more than one mich toxic substance of the of regardles of , regardless the degree degree its concen-concen- tration tration are also hazardous unless they are undertaken in strict conformity with prior written approval of a studied par- qualified industrial hygienist who has the circumstances of exposure and the toxic sub- ticular stances and concentrations involved Butyl alcohol Butylamine ...0--eceseesccecere g ** Carbon Butylcellosolve bumxyethanol ** disul Carbon monoxide de gag = Carbon tetrachloride gag Cellosolve ethoxyethanol gag Cellosolve acetate ethoxyethyl 8- Chlorine aeees | ccceoesressesee Chlorine Chlorine tri^ uaride = Chlorobenzene ( monochloroben- = .. .. soeesceseereces sone pichloromethane Chloroform pichloromethane Chloro 1 2. nitropropsa eense . 8" * g 20 Chloropicrin eee paeewres - 300 15 240 9,000 110 160 740 540 a .4 350 490 100 7 Section 50-204.276 Threshold limit values d Cases and vapore Substance million Milligrams Milligrams PATI of cubic | per meter air volume volume 200 10 S 1,000 . 20 8 cous Ally chimide . Allyl propyl dimalfide Aummonia Amyl acetate ea se + Amyl aimbol uoamyl alcohol : Beurme bensal cc creer ccecreee Benryl chloride 2... cecsseccees Brumine eee eeeees Sumdime 1 butadiene Butanone methyl ethyl ketone Butyl acetate butyl acetate 1-888 1-888 1- 888 1-88 8 1-888 " .05 3-- 3-3-- 1,000 1,000 250 200 360 25 20 2,400 2,400 1.2 45 12 15 12 70 1,050 560 19 .2 877 877 877 2,200 740 951 Chloroprene chloro buta- diane ... cceerervevssmeoeres Cresol all isomers oe ee ones Cyclobezane Cyclohexanol 2.00. Cyclohexanone Cycloheex ee ee eecn eree esf Cyclopropene 0.6 aesces Decaboranc Diacone alcohol hydroxy # ^ ggggg ggggg ggggg ggggg ggggg 05 pentanone Diborane eee ee Dichlorobenzene Dichlorandifluoromethane Dichloroethane Dichloroethane ethylene di- chloride Dichlorethylene -..ss0005 sooef Dichloroethyl ether Dichloromonafluoromethane afwvethane Dichlorotetrafluoroethane Diethylamine vce vccscceeces bramomethane Disobutyl kewne ese ccencennes Dimethylaniline dimethylan Dimethylaniline ere Sree Dimethylsulfat 22. eesereee: 100 200 15 1,000 10 1,000 25 100 50 S t 90 22 1,400 1,400 410 +00 1,350 1,350 690 S 240 wt 300 4,950 400 88888788 88888788 88888788 88888788 88888788 7,000 88888788 88888788 88888788 88888788 ** ** 30 Gas and vapore Substanc Dioxane diethylene dioxide Ethyl acrylate Ethylamine Ethylbenzen2.eeer eres . Ethyl seeee bromide Ethyl ether ..0.-...e-eee5: Ethyl forma.t-.e .- Ethylalicate Ethylene chlorob6..d. ereisn Ethylenediamine Ethylene d^>bramide( dibromo- ethane Ven eeeecetewses Ethylene imine .....-- sete eneeee Fluorotrichloromethane Formaldehyde Furfural Pn Perr Hexane hezan^' we eeeee Hezanome methyl butyl ketone Hexone methyl isobutyl ketone Hydrazine er ketone Hydrogen Buonde wee Hydrogen peroxide % ....---Hydrogen selenide ..e- eee eee: Hydsr ulfo ide g ...5e .--n 55- Iodine esse see ences . 20 -_ xX Maxityl aside seeenees Methyl acetcy osel ra ee seen rere e- Methyl acrmey thanoll methanol meta hanol t ecee ree Methyl simbol methanol Methyl bromide Methyl cellosolve methoxy- ethanol he ec ere tetoneor = Methyl tellomolve acetate ethylene glycol monamethyl ether } Meshylaj Meshylaj dimethoxymethatnricbeioMethyl chloroform 1 , tricbio- SL 610 120 210 100 2,700 F F 470 Methyl form .sa ecet e se er ees Gas and Substance par cubic mem of e air Methyl isobutyl carbinol Methyl amyl alcobol ...-.--ssene sees Methyl stychlr oride chlorie de dichlon ro- dichloro- e dichloro- Methylene chloride dichloro- metanh iline ca ece n rece ee neee Monomethyl aniline .... savecenes Naphtha coal ter esse eee Nickel carbonyl Nitric acid Nitroethane Nitrogen dioxide seseee weeees Nitroglywin .. 200-200 --. Nitromethane Sevres Nitrotoluene 888 001 10100 w 100 Pencade Pentanone methyl propyl ketone .. Perchlorethylene Perchlorethylene wtrachloroethyl- 007 Propyl alcohol iaspropyl alcohol,. Propyl ether impropyl ether . Propylene dichloride 1 dichlan ' pro ... p .. s a recccn eenoe enen Proop xidey6.l 5 -0-e seeneee eeee Pyridine Sab ...i ccsen s cee ce arrcee oreo Stoddard molvent ee seceseeee Styrene madamer phenylethylene ulfurdioxide eoneens .07 .07 2,10 350 350 we 2,8020,800 13 1,1,2,2 Tetrachloroet..h,a.-n.-e- Tetrahydrofuran eeeeseesases Towaniomethane cent: Talume 2. eee enesenes o Toluidine TrichloTrichrloroetohyleneecteehy es leee v cneee: Triethylamine doses cereces REGULATIONE 40-104 TOXIC DUSTS FUMES AND MISTS million volume 1,000 Trifluoromno 1,000 Turpentine .... Vinyl chloride chloroethylene Vinyl toluene Xylene xylal Xylidine denseeee po cubic Mercury organic methoxyphenyl Mercury .. wxapounds oe ore wxapounds secessseee .1.1 .01 .01 Methoxychlor organic methoxyph1e, n triy chllo- roethane Molybdenum Soluble compounds Insoluble compounds. pee Nimine Nimine . eaeneeeen 15 Pentachloroapbzhalene Pentachloroaapbzhalene TOXIC DUSTS FUMES AND MISTS Bil igrams Billigrams parabit parabit kit Substener Aldrin 1,2,3,4,101 ,10 ,4,43,5,8,8a 25 dimethanonaphthalene cescccssesaes Ammate ammonium sulfamate es . Pyrethrum 2 teesee anacecesccsesseecerre eee S Selenium compoundi as Sc Sodium hydrazide -se eeedes Sodium Buardactate 1080 ..cccccressecvecee , met erenrocsnssseresresseses 1,2,4,5,6,7,8 octachloro tetras Calcium arsenate Chlordane sceeeeeneeee? c ca seees cee c sec 4,7,7a methanosodane Chlorinated camphene % ---- peaeeees pee eeeee 1 1 2 S Chlorinated diphenyl oxide .. . Chkrodiphenyl 42 chlorine . Chlorodiphenyl 54 chlorine . I Chromic acid and chromaastC esO +--+ oe Ong herbicide sodium frodium dichloro- phenoxy ethanol hydrogen sulfate 15 . Cyanide ( CN . dichlorphenoxyaceti dichlorphenoxyaceti dichlorophenoxyacetic dareeee 10 2,4 2,4 dichlorophenoxyacetic aci-trichlord ethane eces DDT 2,2 chlorophenyl } -trichloroethane I Dieldrin 1,2,3,4,10,10 bexschloro epoxy 1,4,4. 4. ,. 5 .25 Dieldrin octubydro 1,4,5,8 dimethanonaphthalene Dinitrobenzene do rseweses ieee Teory trinitrophenylmethylnitramine .. b Thiram tetr thiua ram m die st ulh fy idl e S Thallium luble compounds .3 $ Titanium dioxide 5 Trichloronaphthalene Uranium compounds Soluble compounds ... Insoluble compounds Vanadiums O VO chart eewerees ts erersaascserce fume eres veeeee S 3 Warfarin hydroxycoumariz , 5 Zirzaium compounds compounds 21 Zinc oxide 15 fames pecescwcccnewccctecereer 5 sere ee MINERAL DOTS EPN ethyl nitrophenyl shionsbensmephos S phonatephonate . dithiocarbamate Ferbst ferric dimethyl dithiocarbamate 25 . Fluoride 2 cee eetscennreesseaneetecenonees Hydroquinone .15 seer ene ere neneen een arecseee Lepdccsccceccsvcsececvorvsaecr Lead bexachlorocyclohtane cacceccesesencnccceenesereerscenes .15 .15 .15 Magnezium oxide dithiophosphate Malathion 0 dimethyl dithiophosphate of diethyi mercaptosiocinate dithiophosphate .15 seen b anganeseb anganese 8 seeeeecee .... aenesesrerereerereress Ahuminum and .....-ee eee ececee aeeee oe Pree WWVESEEAEET eases pia see Dust quisance po Mica below % free silica 7899 High above 50 free 10 20s ese eee 7899 Medium 5 25 50 free IO Silicon carbide pec nec ccc er sec ee terete eens below % free 104 wees Soaperope ees ceeeiesnes beeeeees Tak cceececeeee Vacceneteoeeessreeeres 7899 && && eee ere we me A 32 REGULATIONS 50-204 VENTILATION Section 50-204.288 General ventilation and tem- perature requirements be a Qutside air shall provided to all workrooms at the rate of 15 cubic feet per minute per person or one and half air changes per hour whichever is greater In most instances leakage through walls doors and windows will produce at least one and one- half air changes per hour b A minimum air temperature of 60 F. should be maintained at all workrooms where work of strenuous nature is performed and a minimum air tem- of 65 F. should be maintained in all other perature workrooms unless prohibited by process requirements Section 50-204.289 Local exhaust ventilation a Every local exhaust ventilation system shall produce and maintain a movement of air toward the opening sufficient to prevent escape of contaminant to the workroom during working hours beyond the limits shown in section 50 204.276 b Air flow through branch and main ducu shall de sufficient to transport the contaminancontaminant t through the system without settling c Piping shall be located so as to be accessible for inspection and maintenance d Air flow equipment including hoods pipes fans motors and collectors shall be effectively grounded shall not be to be e Two or more operations involving more than one substance permitted connected to the same exhaust system when a combination of the substances removed may constitute a fire hazard an explosion hazard or otherwise dangerous mixture f Those processes or operations using or generating flanumable dusts gass fumes vapor mirs fibers or other impurities shall be completely pro- tected from all sources of ignition g The capacity of an exhaust system thall be tailculated on the basis of all boods booths and enclosures connected to the system being open except where the system is so interlocked that only a portion of it can be operated at a given time in which case the capacity should be calculated on the basis that all the hoods in the group requiring the greatest volume rate of ex- haust are open b Suitable air inlets shall be provided for replace- ment of exhausted air i Exhaust systems handling dusts and discharging to the outer air shall be provided with suitable aircleaning devices to remove air contaminants prior to the discharge to the outer air except under unusual circumstances j The discharge from any exhaust system shall be such that no air contamination therefrom will enter any window door or other opening of any work space in quantities sufficient to create a health hazard to such space or create a nuisance to surrounding areas k Collected materials shall be removed at intervala frequent enough to insure that the exhaust sys tem will meet the requirements of section 50-204.289 atat all times NOISE Section 50-204.293 Noise Noise shall be reasonably reduced or eliminated as a means of preventing fatigue or accidents PERSONAL PROTECTIVE EQUIPMENT Section 50-204.298 Personal protective equipment Personal protective equipment or protective shields or barriers shall be provided and maintained in usable condition whenever substances radiation or mechani- cal imitants are encountered in a manner capable of causing injury or impairment in function of any part of the body through skin or mucous membrane ab- BITUMINOUS COAL AND LIGNITE MINES Section 50-204.300 Federal Mine Safety Code The Federal Mine Safety Code for Bituminous Coal and Lignite Mines of the United State Part Un derground Mines and Part Strip Mines as published by the Bureau of Mine United States Depart- ment of Interior is hereby adopted by reference as the safety and health standard required for observance in the bituminous coal and lignite mining to which sec- tion e of the Healey Public Contracts Act has application ELSEVOIENT ELSEVOIENT MENTING DATE 1957 Ome