Air System Equipment Curtis Refrigerating Machine Division of Curtis Manufacturing Company 1959 Kienlen Ave., St.

244 CHAPTER XI 1951 Guide.

526 CHAPTER 22 1951 Guide For a radiator, the finish coat of paint affects the heat output.

616 CHAPTER 29 1951 Guide coil F is required to warm the air to a temperature above freezing.

878 CHAPTER 40 -1951 Guide Sound Control 879 Tateofl Fia. 6.

1070 1951 Guide Crane Co., 1308-1309 - General Electric Co., (Bloomfield, Trane Co., The, 1150-1151 Dewey-Shepard Boiler Co., 1330 N.

MAliONAi. mcScUM OF HEALTH AND MEDIQNSAXMED FORCES INSTITUTE Of PATHOLOGY *' ~ Participants in STenth Saranac Sysposiua 1952 T&xi8p M* Rmf M*D* 25 V.

30 Safety Exposition Exhibitors Transactions, 1953 National Safety Congress 31 Holland-Racine Shoes, Inc, Holland, Mich.

Current Safety.

80. 24.

Office Safety LEADING ACCIDENT TYPES OFFICE EMPLOYEES COMPARED WITH OTHER INJURED WORKERS 111 364 FALL OR SLIP 474 20.8 STRAIN OR OVEREXERTION 138 189 239 STRUCK BY OR STRIKING AGAINST 164 17 5 27.4 | MOVING MOTOR VEHICLE ACCIDENT CAUGHT IN OR BETWEEN KIEFER STUDY CALIFORNIA STUDY OFFICE EMPLOYEES ALL OTHER WORKERS ____ I________ 0 10 20 30 40 Per Cent of Total Number of Injured Workers Fig 15-2 --A comparison of the California study with the Equit able study, and of office employees with all other workers 50 example, paid out $102,000 over eight years at one facility just for injuries incurred by people falling out of chairs Approximately 25,000 people worked at the plant, on the average, and more than half were office work ers Fourteen chair accidents occurred, and the two worst totaled $97,000 Studies made by the State of California Department of Industrial Relations, and by Norvm C Kiefer, M D, Chief Medical Director, Equitable Life Assurance Society of the U S (see "References"), show that this is not an isolated incident The California State Department of In dustrial Relations analyzed reports filed by more than 3000 California employers (employ ing more than one million office workers) on disabling injunes to employees during 1959 When extrapolated to nationwide scale, onthe-job office accidents would annually amount to about 40,000 disabling injuries at a direct cost (indemnity benefits and medical expenses) of about $100 million (This figure does not include any indirect costs for em ployers, workers, or the nation ) "Office worker" is defined as (m the California study) "a person primarily engaged in performing clencal, administrative, or professional tasks indoors in an office at his employer's place of business " This defini tion would not cover salespersons, claims adjusters, social workers, medical and teach- 374

5^Ca_y* J OtlEltl SC3VICCS itwnu. ' rm*u. tvmv tima NOTIFICATION OF STOCKPILE INSPECTION (when data verted) . >( 4ai0Ct0a P l .

1099 modernizes the concept of the NCRP standards of 1954, 1957 and 195S, obtain able as NCRP Rept No 39, PO Box 4867, Washington, D C 20008 Lasers The threshold limit values are for ex posure to laser radiation under conditions to which nearly all workers may be ex posed without adverse effects The values should be used as guides in the control of exposures and should not be regarded as fine lines between safe and dangerous levels They are based on the best avail able information from experimental studies Limiting apertures The TLVs expressed as radiant exposure or jrradiance in this section may be aver aged over an aperture of 1 mm except for TLVs for the eye m the spectral range of 400-1400 nm, which should be averaged over a 7 mm limiting aperture (pupil) No modification of the TLVs is permitted for pupil sizes less than 7 mm The TLVs for "extended sources" apply to sources which subtend an angle greater than r (Table 5) which varies with ex posure time This angle is not the beam divergence of the source Correction factor A (CFA) for eye ex posure All TLVs in Tables 3 and 4 are to be used as given for wavelengths 400 nm to 700 nm At all wavelengths greater than 1 06 fim and less than 14 fim the TLVs are to be increased by a factor of 5 TLV at wavelengths between 700 nm and 1 08 fim are to be increased by a uniformly extrapolated factor as shown in Figure 2 TABLE 3 THRESHOLD LIMIT VALUE FOR DIRECT OCULAR EXPOSURES (Intrabeam Viewing) from a Laser Beam Spectral Region Wave Length Exposure Time, (() Seconds TLV uvc UVB UVA Light 200 nm to 280 nm 280 nm to 302 nm 303 nm 304 nm 305 nm 306 nm 307 nm 308 nm 309 nm 310 nm 311 nm 312 nm 313 nm 314 nm 315 nm 315 nm to 400 nm 400 nm to 700 nm " *< Infrared A *' ** 44 700 nm to 1 08 Mm 1 06 pm to 1 40 am 700 nm to 1 06 Mm 1 06 pm to 1 4 pm Infrared B & C * 1 4 Mm to 103 Mm " 44 44 44 lO3 to 3 X 104 44 *' ** '* ** ** M M 10 to 10s 10s to 3 X 104 10- to 1 8 X 10-" 1 8 X 10-' to 10 10 to 104 104 to 3 X 104 10- to 10s 10- to 10* 10s to 3 X 104 10- to 107 10`7 to 10 10 to 3 x 104 3 mj cm-2 3 4 6 10 16 25 40 63 100 160 250 400 630 10 J " " cm'2 1 0 J cm-8 1 0 mW cm"2 5 x lO"7 J cm"2 T 18t 1 mj cm 10 mj cm"2 10 " W cm"2 [bght TLV's) X [CFA] (lightTLV) x 5 10"* [CFA] W cm'2 5 X lO 4 W cm 2 10-2J cm2 058 iTT J cm-2 01W cm*2 NOTE To aid in the determination of TLV's for exposure durations requiring calculations of fractional powers Figures 3, 4, and 6 may be used

MEMORANDUM m.

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