Document 0qBe28O9X4p6vBYQ0jOR2KQ7b

LATH AND PLASTER PRODUCTS BB012 0981 sfegeS^:'S; ?distinguishm^^qr^7j^ ; ticular products manufactured and distributed byThe "~3 j J> v --. t- vUnited ..States^Cypsum; Cbmpany. they qtelthq^jcf ^E^I ^ss^sft--filmiiss? rt-.:........ t - ..... ,,,,t .* '-.......... .rWc-.r: .' ........ ............ ws^ 3ST?#a o :-.-Sj4 cd CONTENTS LATH AND PLASTER PRODUCTS GYPSUM PLASTERS AND 3UILDING LIME Basecoat Plasters Finishing Plasters Finishing Lime Masons' Lime Remedies for Plaster Problems PLASTER BASES AND PLASTERING SYSTEMS ROCKLATH Plaster Base PYROBAR Gypsum Partition Tile Metal Lath Attachment Systems Using ROCKLATH Metal Lath Attachment Systems TRUSSTEEL Studs 2" Solid ROCKLATH and Plaster Partition 2" Solid Metal Lath and Plaster Partition Published by UNITED STATES GYPSUM COMPANY Page 8-9 10-15 16-19 20-21 22-23 24-25 26-27 28-31 32-33 34-41 42-45 46-47 48-49 50-51 52-53 BB012 0983 B I I 1 .?****> 1 There are vast deposits of gypsum throughout the world. It is particularly common in Canada and the United States, where the mineral is converted into a wide range of useful building materials. 1 1 the fireproof Lath, plaster, partition tile, and other high quality building materials are made from properly proc essed gypsum by the United States Gypsum Company. These products are readily available ] building material to dealers from many U.S.G. mills located through out the country. By U.S.G.'s modern methods, crude gypsum is transformed into high quality building materials. These USG products are uniform and depend able. Rigid quality controls at every plant and frequent tests in the great U.S.G. research labo ratories maintain their unsurpassed quality. Because gypsum is adaptable, light in weight, strong, easy to handle--and because it is fireproof --it is the basic ingredient of many building materials. The remarkably light weight of gypsum building materials is demonstrated by PYROBAR, U.S.G.'s partition tile, lightest of all such masonry units. Gypsum building materials are made more than adequately strong, thereby adding strength to the frame of the building. They are durable and withstand normal usage for the lifetime of the building. Gypsum building materials are incombustible themselves, and provide remarkable protection against fire to the other materials used in the building, as well as to the building's contents. GYPSUM IS FIREPROOF--whether it be in lath, plaster, partition tile or any other form. In fact it is MORE THAN FIREPROOF--it delays the progress of fire by shielding combustible ma terials. In the language of chemistry, gypsum is hydrous calcium sulphate--calcium sulphate chem ically combined with water. This "dry water" at crystallization comprises 21% of the weigh gypsum. W O nO CD O' s S. 3 i i I I I 3 I 1 When exposed to fire, intense heat attacks the gypsum and little by little drives the water out of it in the form of steam, a slow process known as calcination. As fire struggles to eat through a gypsum ma terial by driving off this water of crystallization, of uncalcined gypsum stands against the flames, temperatures on the other side cannot become much hotter than the boiling point of water (212 F.). The framing cannot ignite as long as the gypsum protecting it is intact. it is repeatedly attacking new layers of uncalcined gypsum. The temperature behind the material does not reach the ignition point of ordinary com bustibles until all the water in the gypsum has been released and driven off. Thus it becomes evident that gypsum is not only incombustible, but in addition it fights fire because of its reluctance to transmit heat. Think what this means as a guard for wood construction protected with gypsum lath and gypsum plaster walls and ceilings. Wood burns at 1 about 400 F.--but as long as a saving barrier ] Walls and Ceilings as you want them with adaptable Lath and Plaster RED TOP plaster and ROCKLATH gypsum lath or USG COLOR-RlTE metal lath are favored for fine interiors because they place no limitations on archi tectural plans and lend themselves perfectly to the best in design and construction--including the creation of curving contours and smooth, sweeping surfaces right on the job. Resulting walls and ceilings are strong, sanitary and fire-resistant. They take any form of decora tion beautifully -- are easy to clean and re decorate. In the event of fire, the gypsum releases its water of crystallization when attacked by flame, retarding the fire and protecting the underlying construction. Architects, home owners and builders recognize these merits of USG lath and plaster. ROCKLATH plaster base or USG COLOR-RlTE metal lath and RED TOP gypsum plaster create fine interiors that stay fine through the years. a a o *- ru o m at Gypsum Plaster and Building Lime STATES 6TPSU - tnsGiy := * f *1514 - ?- :v, 3 bed tod 5! CEMENT piaster I" Cement plaster bed top WOOD FIBER PLASTER mi.| ... j, ,JJ: V Wood fiber 4 ^las,tsils!#l Neat gypsum plaster requiring the addition of an aggregate and water on the job. Use only where good plastering sand, or other good aggregate is available. Red Top Cement Plaster is lowest in cost of the four types of gypsum basecoats described on this page. It is mixed with low cost aggregate, increasing bulk and coverage. . Red Top Cement Plaster requires the addition of an aggregate proportioned strictly according to speci fications. Use of too much aggregate drastically re duces finished plaster strength. See data, page 121 Mill-prepared gypsum basecoat plaster'containing finely shredded selected wood fiberJjriise where extra strength is desired. Requires the addition of : water only on the job. ' ^ ` The strongest of the four types of basecoat plasters, ' * has greater compressive and tensile strength, greater '; resistance to lateral impact, greater surface hardness, ' I greater resistance to cracking. Also provides from * : i 30% to 130% greater fire resistance^ihdn"'sanded ' plaster and is about 25% lighter in'dead*'loadi, For | \ greater coverage and yorkobility^,vw?tDffli^Bo'rf'.v ^ sand may be added in mixing, aIthdugn streng^^ \ fire resistance are then somewhat' reduced^' ` . v.:-' . .--or-.*,-;-- - V? Mr.r. jt 1y>** t ! 1J-, >-'--t red top SANDED PLASTER ,,,U. T ""** a* p v J ; fv- '>.-'..4.. i; Sanded plaster Sanded at the mill to insure correct gradation and proper proportioning of sand. Red Top Sanded Plas ter is manufactured for use in areas where good plas tering sand is costly or not available. Ready to use--requires addition of water only on the job. Better than most job-sanded plasters because only selected aggregate, properly proportioned, is used. |B . - dl ' w p. bojvdcrete gypsum plaster for concrete ttim <tn * Bondcrete ' pliaster . i,i5;^: -y; nn * L't - ^ *-3^ i*-* ' ~' ' Factory prepared gypsu\mrn kbasnecedaeVpriarst\eirf'specially formulated to bond with rough interior monolithic con crete surfaces. Requires addition of water only on the _ job. Total thickness of plaster, including finish coat, not TT to exceed %' on concrete ceilings, on walls. Apply only on concrete surfaces properly prepared ; for plastering and free from oil from forirff a liiitff ( Full directions are printed on the bag. to 1: 3 t I1 '! 1 ] i The leadership enjoved by USG Red Top gypsum plas ters is the result of the most extensive scientific re search program in the industry, plus superior manu facturing and marketing facilities. As a result of U.S.G.'s research and development work, plasterers and contractors expect today's plaster prod ucts to be uniform, plastic and fireproof; thev must be free spreading, easily mixed by hand or machine, and must provide high coverage while setting dependably to maximum hardness and high tensile strength. Red Top gypsum plasters fully meet all these require ments. The complete Red Top line offers a USG prod uct for every plastering need. Each product more than meets applicable standard specifications. 1 Basecoat plasters Gypsum basecoat plasters are applied to bases of masonry or lath and support the finish coat. The United i States Gypsum Company is continuing to improve these important products. New materials are tested in laboratories and in the field before being offered. Tests ] are made at all stages of manufacture and on finished products in warehouse stock. Special grinding equip ment has been devised to produce super-fine, easily i mixed plasters having increased slip under the trowel. There are four distinct USG basecoat plasters--each designed for a specific use--each best on the market i for its specific purpose. Packed in convenient 100 lb. multi-wall paper bags. ] When in doubt read the instructions on the bag 1 Red Top plasters will give the most satisfactory results when instructions are carefully followed. Observe the directions on the bags, or consult the specifications in U.S.G. technical literature. ] Red Top plasters are for interior use and should not be used on the exterior where exposed to the elements. ] They should not be used where contact with excessive moistureis expected.whether on the exterior or interior. Only Red Top Boxdcrete (see page 10), or Red Top Cover-Coat Finishing Plaster (see page 17), should be i applied over concrete. Special care should be taken in preparing the bonding surface in accordance with directions printed on the bag. ] Gypsum basecoat plasters are not recommended for application over surfaces that have been treated with asphalt or other bituminous compounds, nor for appli i cation directly over interior surfaces of exterior ma sonry walls. ] ] The widespread usage of Red Top plasters can be attributed principally to these outstanding features: - Made from the mineral gypsum, RED - TOP plasters are incombustible, will not >: transmit high temperatures until com pletely calcined; actually fight fire. i RED TOP Basecoat plasters bond firmly to approved plaster bases and are spe cially processed to receive any type of . finish coat in common use. Plastic, they permit wide latitude in design of either plain or curved surfaces. Manufactured on a nationwide basis in 23 modem mills, RED TOP plasters are held to rigid specifications. Their setting time is stabilized to minimize the hazards of impure additives, unexpected job con ditions and seasonal irregularities. m, A V V it ' 4 r'a -.t RED TOP plasters are made to withstand normal usage for the life of the building. (Compressive and tensile strength data Page 13.) Processed to give high coverage with minimum effort, RED TOP plasters, by their easy working qualities and addi tional bulk, assure good work at low cost for both material and labor. >0 ADMIXTURES TO PLASTER inffiiiiiiiiiiTitiiiliil it m :tV For ideal strength and hardness,/* ^ the proper proportion or aggregate to plaster must be used -* . t Illustrations show reduced hardness with increasing proportion of sand. ' J - -.vs. *-^,^\?1C^VS '5 J* .' W'-- . ` Recommended proportions of m&i X\ ['- ` ;'j-:\;1.?\\\\`:T;r-';:, -r> <-v-V:^ -is,?-*':'* gypsum cement plaster to sand by weight and approximate covering capacity at recommended grounds 4 Plaster Base; Gypsum Lath Insulation lath Metal Lath Brick-Clay Gypsum Tile Tile 1 Two Coat Work Scratch Doubleback Plaster 1:2 Vi 1:2 Vi .-- V 1:3 1.3 Three Coat Work Scratch Coat Plaster 1:2 1:2 1:2 Brown Coat Plaster 1:3 1:3 1:3 -- -- Coverage Range 5q. Yds. Per Ton 175-220 175-220 90-125 175-200 i ! 200-240 ` Water All gypsum plasters require the addition of water on the job. As a general rule any water fit to drink is suit able for mixing plaster. Sand Neat or gypsum cement plaster is designed to be Imixed with an aggregate on the job. Sand is the most commonly used plaster aggregate because it is eco nomical and generally available. Proper proportioning and gradation of sand are most important in determining bulk and working qualities of plaster, and the ultimate quality of the finished wall. Over-sanding or the use of an excessive amount of fine sand, each reduce the strength and hardness of gypsum plasters. The American Society forTesting Materials in ASTM 3Designation C35-39 has established the following speci fications which are regarded as standard for the proper gradation of good plastering sand: Size of Sieve Percentage of Sand Retained Max. Min I No. 4 (4760-micron) No. 8 (2380-micron) No. 30 (590-micron) No. 50 (297-micron) 0 10 80 95 . ca ra O i. *-* 7. W No. 1 00 {1 49-micron) *9 The amount of material finer than a No. 200 (74 micron -o ra dt>vp chnil rifjf 1 1 ] 1 Lightweight plaster aggregates The use of lightweight aggregates is growing in many markets. When properly used their light weight, fire 1 resistance, adaptability to winter plastering and ease of handling on the job make them highly desirable. 1 Perlite This is an excellent lightweight plaster aggregate, and is becoming increasingly available. It is a product derived from lava ore which is exploded under heat. ] When used as a plaster aggregate it must conform with the ASTM Specifications for Plastering Sand and 1 weigh from llA to 15 lbs. per cu. ft. It is generally sold in bags containing 3 or 4 cu. ft., and is mixed on a volume of aggregate to weight of gypsum plaster basis. 1 Perlite has excellent fire-resistance qualities. When mixed with gypsum plaster it provides a plaster strength greater than that with vermiculite and nearly equal to I that with sand. Premixed plasters containing the correct propor tions of gypsum plaster and perlite are available in some markets. Vermiculite This aggregate is produced from a non-metallic mineral of the mica family. It is ground and exploded under heat into lightweight granules. As an aggregate for plastering, vermiculite must conform in particle size to ASTM Designation C35-39 for gradation of plaster ing sand, and shall weigh between 7!'2 and 10 lbs. per cubic foot. Vermiculite plaster aggregate is generally sold in bags containing 4 cu. ft. and is mixed with gypsum plaster on a volume of aggregate to weight of plaster basis. Premixed plasters containing the correct pro portions of gypsum plaster and vermiculite are avail able in some markets. Walls plastered with a mix containing vermiculite as an aggregate have lower strength and require a longer period for drying than walls of sanded plaster, but are lighter in weight and have greater fire resistance. 1 Recommended proportions of lightweight aggregate per 100 lbs. plaster. Gypsum, fiber insulating, or metauath bdses^ I I I Note: In two-coat plaster woric over gypsum or fiber insulating lath not more than 2 'h cu. ft. of lightweight'aggregate should be used per 100 lbs. gypsum plaster. Masonry surfaces should be moderately wetted to reduce suction. When perlite is used and wetting is impractical amount of perlite may be increased to not more than 4 cu. ft. I ___- -.i. -. i rin-in-,1 - ---------- - ---- --- I Gypsum plaster--strength data . Wood 4 I f. Fiber V 7: J I Mix 1.1 > u i. 'fluffy > -Cement Plaster: Sand V Cement Plaster :* I '"-il'iVormicunte- j V-' Perlite V .--:|,2 . v- . $>, : 1:3 " 100 Ibs^ 2 eu. ft. 100 lbs.: : 3 eu. ft. 100 lbs.: 100 Ibs^ 2 cu. ft.... 3 eu. ft.^ Compressive strength- lbs. I per sq. in. (typical test results) 2600 ~ " ,2100 "" -iiy - i'] 1206 ' '^''750 r; ' 500 ` >;30d ' ' io'oo Tensile- strength lbs. per sq. i -in. (typical test results) ;-'.'440 fv A;245 ,: ilpil 170 . , 5.fv'iao; >130 ;7 / ?0 ~ Ml 165 BB012 0993 STORAGE, MIXING, APPLICATION i U~H -( '/I _ fcrl% 4' .L r Ji-rv Plastering specifications may indicate either two-cccoat or -- - :>- >!;.- : :v.'three-coat work. Two-coat work consists of one base coat '"' and one finish coat, and it is generally used over a masonry plaster base and often over gypsum or insulatkm^lath. IrT three-coat work there are two separate base coats and a finish coat; three-coat work is required over metar lath. The first coat is known as the "scratch" coat ana tfie' second ^' coat as the "brown" coat. * C4 v'T^-': 'ir, Two-Coat Work - Where base coats are applied by either the. "single coat'* or "scratch-double-back", the overall plastering operation ; is termed two-coat work. The basecoat plaster is applied to ~ : slightly less than the thickness of the grounds bnd'rodded 'f . v/ '^rV` " ' '" r.Y-1'"*-. `v :^ ? '^1`Ssii'." Three-Coat Work " a* The scratch coat is sanded 2 parts of sand to. Impart of. .. . plaster by weight (for vermiculite or perlite, proportion by ' i volume of aggregate to weight of plaster}. It is applied to ... a thickness of approximately 14* over the face of the lath and then cross-raked before it sets to provide a mechanical t ^ vTfcey for the brown coat. The brown coat is sanded 3_parts of aggregate to 1 part ;#-.t 'of plaster, and is applied directly to the set scratch coat \ The brown coat is used to fill out to iust slightly below theT'^jS grounds and is rodded and darbied to a true, even surface/ " r It is left rough enough to receive the finish coatii How to use Basecoaf plaster Red Top plasters are the best that research and efficient production methods can provide. Nevertheless, to as sure best results care and skill should be exercised in handling and application. U.S.G. provides detailed di rections and complete specifications for proper use of each of its plastering products. Compliance with Stand ard Specifications for Gypsum Plastering of the Ameri can Standards Association is recommended. Warehousing Store plaster in a dry, well ventilated warehouse. Ro tate stocks by shipping oldest material first. Red Top plasters are mixed for use in the same season shipment is made from the mill. Delivering Protect plaster bags from moisture, both in transit and stocking on jobs. Wet bags cause trouble. Mixing In hand mixing, determine proper proportion of aggre gate to be used (if aggregate is required), and place aggregate and plaster in one end of box. Hoe dry from one end to the other, working aggregate and plaster to gether until thoroughly blended. Then add water and hoe plaster into the water, mixing thoroughly to proper mortar consistency. In machine mixing, put in water, then half the re quired amount of aggregate, then dry plaster, then balance of aggregate. Mix to desired consistency. Never mix plaster in dirty mixing boxes or machines. Do not prolong mixing beyond time required for uni form intermixture of the components. Use only clean water ............. -y.,;: Use only properly graded aggregate ii ! Mix no more than can be applied Rg&in one hour V A" :W - Do not retemper plaster that has started to set, V' " A In cold weather provide adequatelheat to ' ............. .-J - ^ ....,__ .. i ___ Prevent plastered walls from drying^^^^^W4^^^rf ' jr^/'out until set Machine mixing of plaster is economical on large jobs . ,;Vi - 4' 4 4 ^: ,* .A"-,--' 1 4 *? mpi - -3 ISj ' i:: 16 RED TOP $XAP GAUGING PLASTER ; I *'*' "*'*' ' h. rid top CHAMPION whit* gauging s PLASTER j |; II,til lit'" Finishing plaster Finish coat plaster completes the architectural design and provides a suitable base for decoration. Finishes are either factory prepared, usually requiring the addi tion of water only, or they may be job mixed, involving a blend of lime putty and gauging plaster or lime putty and Keenes cement. The finish coat is applied to a thickness of Hi' to Vs". Several types of finish coat are available, each designed to serve specific requirements. Lime-Gauging Finish Coat consists of hydrated finish lime or finishing quicklime soaked or slaked to putty consistency, and blended in proper proportion with gypsum gauging plaster. For complete description and data on finishing limes, see page 20. [ED TOP KEEN E5 CEMENT ^tl *" 3 ^ !','T, "5Cirj "-if-.fi red top :-wv-,,i '> TROWEL FINISH V rI ! . 1 - ,na iti'H J i Gauging Plaster. The function of gauging plaster in a lime-gauging finish is to provide initial set and strength and hardness to the surface finish. It is ground to the proper fineness to blend readily and completely with the lime putty. To serve various job and market re quirements, USG gauging plasters are produced in 2 setting times and in a choice of gray or white colors. Gauging plasters are used only with finish limes as described on page 20 in the proportion of one part gauging plaster to three parts of lime putty by volume. This is the equivalent of one part gauging plaster to two parts of dry lime by weight. Available brands, setting times and finishes Brand Set with Lime Putty RED TOP CHAMPION Gauging Plaster (white) Quickset--10-15 min. RED TOP STAR Gauging Plaster (white) Slow set--45-60 min. RED TOP Gauging Plaster (gray) Slow set--45-60 min. RED TOP Gauging Plaster (groy) Quick set--10-15 min. RED TOP Regular Keenes Cement (white) . 3-6 hours RED TOP Quick Trowelling Keenes Cement (white] 1-2 hours ;- , ., . - 'j Brand Type of Finish ' RED TOP Trowel Finish Plaster RED TOP IMPERIAL finish Plaster RED TOP Skim Coat finish Plaster RED TOP Sand Float finish Plaster smooth smooth smooth sand float '' All finish plasters are shipped in 100 lb. multi-wall paper bags. Keenes Cement is a high strength, pure white gyp sum plaster used with finish lime putty for extremely hard, dense surfaces. Keenes cement provides the strength and the lime putty imparts the necessary plasticity. When mixing, proper proportions must be carefully observed. For "medium hard" finish, mix in the proportion of 50 lbs. of dry hydrated lime (100 lbs. lime putty) to 100 lbs. of Keenes cement. For "hard finish" limit the quantity of lime to 25 lbs. of dry hydrated lime (50 lbs. lime putty) to 100 lbs. of Keenes cement. Gypsum Trowel and Float Finish Plaster. Factory prepared gypsum plasters requiring the addition of water only on the job. These finish plasters have ? natural bond to gypsum base coats, develop superio hardness, are non-alkaline, may be decorated safe! much sooner than lime putty finishes, and contai nothing injurious to paint or other final decoratio Bfl0 l2 099& *33SWI8F'.?SA*-'S'-^as?f55W%' -^.^j^oJ^r.-^a.Agt^ ^.VT'lp^:^.k.;' I*--- m&.wxic-z cowSfi"ISH ' PLASTER |.m inn* " ^ n5 I* 0j vy Awavvvvag<!B RED TOP COVER COAT finishing *> ORIENTAL Interior Finish Plaster, integrally colored in a choice of 12 colors at the factory, this finish plaster requires the addition of water only. It has a natural bond to gypsum basecoat plaster, may be finely floated or textured and requires no further decoration. Colors: White Sahara Cream ivory Tusk Ivory Harvest Buff Parchment Golden Buff Mist Gray Caenstone Shell Pink Desert Rose Cool Green For coverage see data below. ORIENTAL Exterior Stucco Finish. Exterior stucco finish in eleven pastel colors and white. It is uniformly pre-mixed, water-resistive, non-staining, easy to apply, and enduring. Eliminates much of the uncertainty in herent in a job-mixed stucco finish. Uniformity of ag gregate and color standards permits matching of colors between batches mixed at different times and under different conditions. Oriental Stucco sets slowly to facilitate proper finishing, minimizing unsightly streaks and shading. Will produce either period textures or smooth trowel, stipple sponge, rough coat or spatterdash finishes. Applied over a base coat of portland cement, lime and sand. Coverage approximately 150-200 vds. per ton. Colors: White Sun Tan Pewter Gray Stone Gray Eggshell Ivory Copper Rose Alamo Buff Mission Cream Cascade Green Pueblo Tan Indian Coral Rancho Brown RED TOP COVER COAT Finishing Plaster, unlike all other types of plaster, bonds directly to smooth unpainted concrete surfaces and provides a smooth finish ready for decoration. Because Cover Coat bonds directly to such surfaces, considerable time and ex pense are saved by using Cover Coat instead of other procedures such as surface roughening plus bond plas ter, buffing plus spackling compound, or furring, lath ing and plastering in the conventional manner. Factory prepared, Red Top Cover Coat requires the addition of water only on the job. It is applied in two thin coats to a total average thickness not exceeding 1's". Careful adherence to directions on the bag for surface preparation is necessary. Coverage, 300-700 yds. per ton depending on surface. Finish plaster data i&l - .. . ]:v;V*-..Vv. -- -V- v.VvivA"? v - Gauging Plaster - .:V . ' to Lime Quick Trowelling Keenes Lime Mix by weight of dry materials: '' .1:2 . 2:1, Medium Hard 4:1, Hard Color a^.r^''?.** 7 ' 7-v White or Gray (1) .White pty . White Finish Texture . . ' '.W; Smooth Hardness in Kilograms (2) '' > L-: "-P 34 Smooth 50 Smooth 70 Workability ... ' .1 36 . 1-.J, 1 , LL "VJ VJW.NJ7J Gypsum Gypsum Trowel Finish Hoot Finish ORIENTAL' Finish NEAT NEAT NEAT ' White White or Groy 12 Colors Smooth . Float Float 55 (See Note 3) (See Note 3] 2 5 4--' -v;- P Coverage 1 ton gauging 2 tons Keenes 4 tons Keenes 1 ton will 1 ton will 1 ton will '; ' 2 tons lime cover approx. 1 ton lime AC ' "`1 ton lime cover approx. cover approx. Cover approx. cover approx. cover'.''' approx. 1000-1400 yds. 850-1200 yds. 1300-1700 yds. 350-400yds. 250-275 yds. 250-300yds. : ^ / Ap/.' (1) Gray with "local" gauging plaster. (2) Kilograms required to force a 10MM ball .01' Into plaster face, . (3) These are hard finishes but the aggregate in the surface does not permit an indication with this test. Special plasters In addition to its complete line of wall plasters, U.S.G. has perfected and formulated a number of special plasters for other applications. They are recognized as quality leaders in their respective classes because of the carefully controlled scientific processing by which they are made. RED TOP Moulding Plaster--used in specialized work such as casting ornamental enrichments or running cornices. The grind is conducive to fine detail. In cast work, moulding plaster is used neat, whereas for run ning cornices a small portion of lime is used. Red Top Moulding Plaster is available in white and local, or grayish colored, grades. RED TOP Casting Plaster--for moulding done di rectly in the plaster. Results in smoother castings showing excellent detail--ideal for making fine plaques and art statuary. Art Plaster--different from any other class of plaster, being designed especially for casting novelty artware ready for painting. It contains additives to produce sur face hardness in the finished work that minimize paint absorption. Available in white or ivory colors. Dental and Orthopedic Plaster--made from selected gypsum and remarkably lree from grit and other foreign elements. Extremely find grind--exceptional quality. These plasters are very well known under the brand names: White Star Dental Plaster and USG Ortho pedic Plaster. RED TOP Partition Tile Cement--a speciallv prepared gypsum cement used with water and sand as a mortar for setting interior partitions ol gypsum or clav tile and gypsum fireproofing and column covering. Red Top Par tition Tile Cement makes an easv working, economical mortar having early high strength that provides strong mortar joints for any non-bearing partition tile work. plaster absorbs unwanted noise...incombustible...provides wall and ceiling beauty...easily applied SABINITE Trowel Finish (M) SABINITE Float Finish (F) A highly efficient acoustical plaster, prepared to pro duce a continuous surface with exceptional sound ab sorbent qualities. Sound absorption. With countless sound traps, Sabinite Trowel Finish absorbs a high percentage of all noise that strikes its surface. Has a Noise Reduction Co efficient of .60 (see table below). Fire resistance. Basically mineral, it is incombustible. Flexible in use. Like any plaster, Sabinite Trowel Finish is adaptable to any architectural design. Its continuous trowel finished surface lends beauty to any decorative plan. For use on any ceiling area and on sidewalls not subject to contact. High light reflection. Laboratory tests indicate reflec tion of 64% for Sabinite Trowel Finish Oyster White. Easily applied. Sabinite Trowel Finish is applied as a finish coat plaster and requires only the skill of a competent plasterer. Economical. More sound absorption per dollar than most other commonly used acoustical materials. Maintenance. Sabinite Trowel Finish plaster may be cleaned with a good putty-type wallpaper cleaner or with a vacuum cleaner using hose and brush attachments. Redecoration. Sabinite Trowel Finish may be re decorated with Texolite paint (Standard or Imperial). Apply according to U.S.G. directions. Tests by a nation ally recognized laboratory showed Sabinite Trowel Finish had no loss in noise reduction coefficient after 2 spray coats of Imperial Texolite were applied. Colors. Available in Oyster White, Colonial Cream, Antique Ivory, Spanish Buff and Caenstone. Color samples are available on request. Over existing ceilings. Sabinite Trowel Finish mav be applied over most existing surfaces through use of a special asphalt emulsion bonding coat. Refer to U.S.G. representative or to technical literature for data. A highly efficient acoustical plaster used where a float finish is desired. Sound absorption. Noise Reduction Coefficient of .55 (see table below). Fire resistance. Basically mineral, it is incombustible. High light reflection. Laboratory tests indicate reflec tion of 54% for Sabinite Float Finish Oyster White. Flexible in use. Similar to Sabinite Trowel Finish, Sabinite Float Finish is economical, easily applied.. Maintenance. Sabinite Float Finish plaster may be cleaned with a vacuum cleaner using hose and brush attachments. Redecoration. Sabinite Float Finish may be redecorated with Texolite paint (Standard or Imperial). Apply ac cording to directions. See statement under Sabinite Trowel Finish for results of redecoration tests. Colors. Available in same colors as Sabinite Trowel Finish. SABINITE 38 A float finish acoustical plaster specially prepared for sound conditioning in locations subjected to high moisture conditions, such as ceilings in shower rooms, ceilings and sidewalls in swimming pools, etc. Sound absorption. Noise Reduction Coefficient of .50 (see table below). Fire resistance. Basically mineral, it is incombustible. Maintenance. Sabinite 38 plaster mav be cleaned with a vacuum cleaner using hose and brush attachments. Redecoration. It may be painted with Texolite Impe rial paint applied according to U.S.G. directions, which will vary according to conditions encountered. Direc tions available on request. See statement under Sabinite Trowel Finish for results of redecoration tests. Colors. Available in White only. SABINITE Acousticol Plasters are ordered on a yardage basis . . . sufficient material is pro vided for application to a thickness of Vi inch. All standard colors are immediately available. Sound Absorption Data c vfSabinite Type >: Thickness Trowel Finish ("M") - Vi inch Float Finish ("F") .. >'QM. - /J Vt inch $;:/% i.n..c.h.' "128 .18 .19 T i25 . 256 .24 .22 .26 512 "1024' 2048 .45 78 .85 .43 .80 75 .32 * .60 ;; ?6 4096 .83 75 NRC - :* Authority; .60 National Bur. of Stds. ] .55 . National Bur. of Stds. j A50 Riverbank Lab.\f>^gSj BB012 0999 y- r- -.. J s?4 -* ^ a*. +<- -<j * ;-T-^w-- ';**.* '' ' '~^--r :in, i mi -:o 1 .iJ.v. < z {;*: (5 v i .5 . :.......) ; ' V'.'.^y'.;Z^'r-ir-S^''^''^^-:- : ^ ' ''" ~r -,?J^.i.-..V:'.&^.'-'&.; '?'{ `V-j1 /v. **.*?* *J:; IW" H C*/ ,,JUI KYIHTU ' FINISHING UME ,,,,, m'i> o"< "* `^5 __ ' The finest of finishing limes! Produced by ^exclusive U.S.G. patented process... for hand or mechanical mixer... requires no more than 15 minutes mixing on the job. BED TOp'|! rin 5; FINISHING j* UMl J ;l him >"' 1 Highly plastic, easy working, pure white . smooth, hard finish when properly mixed with gauging plaster ... requires 12 hours soaking for a plastic putty. . Long known as a quality produtf"^fe^'?j) proper slaking and aging determine :;J job results. Age at least 16 hours before * *7' using to obtain maximum -Sx^-v > J&Ly* , TfJ -P;?^ ?<; * -1 Double Hydrated Finishing Lime .p ** y v- v#* , '* - . - ' vjt W Brand . .. ;: Type Material Vl^T. >\ '&*/' 'ff'y v c > r ~ , U.S.G. Mfg. Mill Ivory \ - Dolomitic Double Hydrate Genoa, Ohio : Size Container Approximate ,?4 ;c; Coverage per ton ^ 50 lbs. ; | 700 yds. , ^ Hydrated Finishing Lime `<'"??: 4^Jfv^v''. - '< ' *'. .'-i- ' Brand ' Type Material U.S.G. Mfg. Mill Size Container Grand Prize ' Red Top ;:> Red Top Red Top V;. Dolomitic Hydrate Dolomitic Hydrate High Calcium Hydrate High Calcium Hydrate Genoa, Ohio ' Genoa, Ohio Famams, Mass. New Braunfels, Tex. 50 lbs. ' 50 and 25 lbs. 50 lbs. - 50 lbs. ' ^ Finishing Quicklime : Brand Red Top Red top Red Top : ~ Type Material High Calcium Quicklime High Calcium Quicklime High Calcium Quicklime U.S.G. Mfg. Mill Size Container Evans, Wash. v New Braunfels, Tex. Famams,' Mass. 60 lbs. 50 lbs. 80 lbs. Approximate ' Coverage per ton j '700 yds. , " :;-y700^s^M ; Approximate Coverage per t C3 C3 .looo^;.; O 1000 yds. : IU ; lOOoVds. - o -.s; ^JSaai3,l o : * a r a ii The purpose of finishing lime is to provide plasticity and bulk to the finish coat. Lime, however, does not set, is subject to considerable shrinkage when drying, and will not produce a hard finish when used alone. For these reasons it is mixed with gypsum gauging plaster to provide hardness and resistance to shrink age. For complete description of USG gauging plasters see page 16. USG finishing limes are manufactured under care fully controlled processes. Dolomitic hydrates from the northwestern Ohio fields, where U.S.G. operates the largest finishing lime plant in the world, are preferred because of the high purity, whiteness, plasticity, smooth ness and excellence of the finish they produce. Since the development of dolomitic double hydrated finish ing lime there is a growing preference for this type. IVORY Double Hydrated Finishing Lime Double hydrate is the finest achievement in finishing limes. As produced by patented U.S.G. methods under the new autoclave process it produces a completely hydrated, highly plastic putty. This permits soaking by either hand or mechanical mixing, speeds up job oper ations, and assures freedom from further expansion due to subsequent hydration of the finish plaster. Ivory Double Hydrated Finishing Lime is the stand ard of excellence for modern, durable walls and ceilings. Smooth, easy working putty is developed without long soaking. Use 5L6-6 gal. water per 50 lb. bag of lime, sifting the lime into the water. Mix thoroughly in a mechanical mixer; or hoe in a box, screen, and the putty is ready for use. If overnight soaking is desired. sift lime into the water using same amount as indi cated above; screen putty before using. For the finish coat, blend together gypsum gauging plaster and lime putty exactly as shown for regular hydrated finishing lime. Meets ASTM Designation C206-49 type S, and Federal Specification SS-L-351 type F, including the added requirement of not more than 8% unhydrated oxides. GRAND PRIZE and RED TOP Hydrated Finishing Lime Highly plastic, easy working, pure white. Red Top and Grats'd Prize hydrated finishing limes provide ex tremely smooth, hard finishes when properly mixed with gauging plaster. For proper results, soak hydrated finishing lime 12 hours (overnight) in box using 6-6L6 gal. of water per 50 lb. bag of lime. Blend together gypsum gauging plaster and lime putty in the propor tion of 1 part gauging plaster to 3 parts lime putty by volume (1 part dry gauging plaster to 2 parts dry lime by weight). Meets ASTM Designation C6-49 type N, and Federal Specification SS-L-351, type F. RED TOP Finishing Quicklime. Because it is smooth, easy working and economical. Red Top Finishing Quicklime is known as a quality product. Proper slak ing and aging determine job results. Slake with 15 gal. of water per 50 lb. bag (18 gal. per 60 lb. bag), screen, and store in aging box for at least 16 hours before using. Add gauging plaster in the same proportions as with hydrated finishing lime. Meets ASTM Designation C5-26 and Federal Specification SS-Q-351. Lime putty ring is formed and water placed in center. Gauging is sifted into water and thoroughly blended. BB012 1001 f/rrvr- i! .> y : :j I - - , yr fV`0';-!)n -- f| ..4-V4--s h**r_'* - - - V" 'r'-T- V? 'T-` ' :.-... ..-(Vy: ^ ".i /Vi'-yAA Vy'' V- - >/ J y " -; Double Hydrate '.* S, m i?.- - ^Hydrate "K '-i-yy )j` .<!'-' mortaseal oouili- myohatib MASONS 1IME tMi tMK j >Tv.wnvt\\\! Quicklime r "`Tr." d''-/V> ^7 -AA> ; r`l-A' Vi1 *A " }::]:- r.^--yv-; i'For' masonry mortar, masons lime is generally mixed with Portland cement and sand in :i Vv-H'.yv '-: ' "vv ,,- ! l'" .;J,y :y Varying proportions, depend- '3S* ' ' on the strength and.workf_ pS v' ' j- desired. Hydrated or ""A feb double hydrated lime is also ^ :---- j-------------1--^inconcrete 7;?:' ?>;;'Above grade ; ? :.'<TcT ; . s,^:S-c>:;."A7'^'- 1 -2-9 fttomtim RED TOP | rutvimxio MASONS quicklime ' Specialized use ;vjw *7 y?sv-rA*. J-2-7 to 8 -.1 *.l -4 to 5 : ,'r|jA Excessive continuous rhoishire' conditions 1-14-3 ;7t^| />i:1-.--. ^*-:. y\ iA. xi 1.4iSi.'% ` '* ,.^v rir-v'.^vi^`vf 7 A -A v:77 v.'r -- * -u. .iv ..*.yiate^iM j^!. -.y.^ t a;.: ,,. x ^Vcyivijui-^a:l-x MORTASEAL Double Hydrated Masons Lime--The latest development in building lime. Requires no soak ing as it develops its maximum plasticity immediately. Its superior working qualities, water retention prop erties and maximum sand carrying capacity assure high quality, economical masonry mortar. Mix by volume with portland cement, sand and water to specified proportion. Meets ASTM Designation C207-49 type S, and Federal Specification SS-L-351, type M, including the added requirement of not more than 8% un hydrated oxides. Advantages of using Mortaseal double hydrated lime in masonry mortars: Easier working -- Mortaseal transforms mixes with cement and sand into plastic, smooth-working, uniform mortar. Better bond -- Plastic Mortaseal in mortar makes it easier to get full joints and maximum bond because it retains water remarkably well and stiffens slowly. Weather-resistant -- Full joints and proper bond help produce walls that repel rain, snow, ice and wind. Lower cost -- Maximum sand-carrving capacity, less retempering, faster construction and easier laying--all these factors add up to lower cost for finished walls. Better walls--Exceptional plasticity, remarkable waterretention, adaptability to volume changes, slow stiffen ing and better bond--all help to produce better masonry walls. RED TOP Masons Hydrate--The smooth working qual ities of Red Top Masons Hydrated Lime increase the plasticity and adhesive properties of portland cementlime-sand mortars. Full plasticity is developed by soak ing to putty overnight, using approximately 6lA gal. water per 50-lb. bag. Mix with portland cement, sand and water by volume in specified proportions. Meets ASTM Designation C207-49 type N, and Federal Speci fication SS-L-351, Type M. RED TOP Masons Quicklime--Uniform quality quick lime with high putty yield and excellent plasticity. Im proves the working quality and sand-carrying capacity of masonry mortars. After slaking it is best to age pul verized and ground quicklimes at least 16 hours before using. Mix with portland cement, sand and water by volume in specified proportions. Meets ASTM Desig nation C5-26 and Federal Specification SS-Q-351. RED TOP General Purpose Hydrated Lime--Spe daily processed for consumer use around the hom and on the farm. Ideal for such purposes as soil swee ening of lawns and gardens, whitewash, sanitatio around barns, etc. Attractively packaged and shippe in convenient master containers. BB012 1002 fl E n Ji Brand " :y'u. 'v--^Type Material....-V' y:?";. ti"-:.- 4^st>.W` wvi,V>.. 'V !|i}U.S.G. Mfg. Mill . ' Size }'. Container Approx. Putty^ Yield Per Ton y; tMORTASEAl .' ^^ .rii.y Dolomitic Double Hydrate /Masons*' '`Genoa, Ohio ""?$&& ; 50 lbs. - JaiUgag&8a&3teafli -r L ' Brand .' 'Sr?r.:':?%i::jype Material".; ;yf ,, ^Reo Top }; yyyi'.' y \. Dolomitic Hydrate , V' J|REDTOf-;\3 ??>. '. /> High Calcium Hydrate y "Red Top '7y RShow Drift, High Calcium Hydrate ^7.r.."-x pi.G. Mfg. Mill '/''.'Size,}" y Approx,. Putty . Container Yield Per Ton 1 -Masons} Genoa, Ohio 150 lbs. '?:.;i!: V-'V i&5.'3 l ; Masons i, 'Evans, Wash. & Famams, Mass. :" >v- 50 lbs. -.;b\`\.`3^V.s .J r-v}-m.v> - TV /-'i'-**-%-' ^*i. -Masons.. New Braunfels, Texas 50 lbs...} v'.V.'. -v.J '.' 45 cu. fS^fi J|Rfccr|SPy^ igr^Higli CotoSro^^; $Pulyerized piljS; ifeU,S.G. Mfg. Mill glMasCTiJ,' ^yans\?/ash. 'Container. SWBStCB** f;60 lbs}'; *?SiM W^SSmm Silt isofiPpIverized/Rne ,jM SGrain^per'Fine11? iparnams. Mass. .,:S^ ib*r &IKS2I $?^*.*fcfssais^ ^^'Pulverized. Pebble "^SMh^assaoanPstf'/e New Braunfels. Texas ^80 lbs.;} I3 "'?' /2amam I ' Dawa* A ' U V#*l PmIa^I I I IMA J'f^,-rjS^..- Ty " . Brand v?: iA* r r.:-'`'e'.V..^ i^li.S.G. Mfg. Mill **3 - V>, ':=- fSiie"^. Container ** Red Top };.}* *ftr*-i4f%VD?oV5loii?me4itji5c-3Dt!xo- ub, le Hydrate K' '*. '/;i'!* 1 Red Top rs? .r^'.-^A'V^^High Calcium Hydrate '" ,.' ,>*{ GeneraT; .^Purpose}* vGenoa, Ohio ,. ^S-^' 5,10,25 }':; lbs.';}: Y*%y } General " -Purpose; Evans, Wash. >Vy", S^,^7 -*s' r5, l O lbs. I Red Top High Calcium Hydrate `General /Purpose}} Famams, Mass. :i.^ ;5j'o Ibsf t^n H*0h Calcium Hydrate - ' . >.tj- ^General . ^Purpose ^ . New Braunfels, .siZ* Texas 5/10 lbs. TOP agricultural hydrate is used for soil sweetening and general sanitation purposed ' 1 -- Aariculfural ~':..r and...S"br-/a...v:..H..7v-.d..r..a- te-.y>*vv' ^D used TOP spray hydrates for dusting. are.used for mixing insecticides and fungicides, and'may also8e j5,f:?'B-:;.'r;;a'-.,n'. d',"f':;<'?. '>| Red Top :'' '.';. ' ^VP* Mater'l * v, Dolomitic Hydrate ''!;'' ''"'' '" -l-;.`S^.-Ui^-yjs&'.ev-'-Ar-^- S\ .. *-f' r.Neutraliz-; Soil Coverage ? -' i trig Power per TOO Ibsjlfl Agriculture Genoa, Ohio .''y^Ty;; y.l50 ""' - 3000 sq?^y| /Red Top }/ '- 'S '. .Hig'-Jhj:'^.C'vca-",'lic-..i"u'm' Hydrate I'"' !':-v.''"'.'5.*.`.^: Agriculture Famams, Mass, and vNew Braunfels, Texas ::..;126^ 3000 sq. ft/2 riuSUjSrAi,jii. BB012 1003 COLOR, SURFACE STAINS and BLEMISHES Because of variations in market practices, aggregates, plaster bases, weather and workmanship, this chart has been prepared to assist in the understanding, diagnosis and treatment of job problems. CONDITION --Jv.1 MATERIALS _ --,,.J~CAUSE __ REMEDY OR PREVENTION 1. Connected vertical and horizontal cracks at somewhat regular intervals, often in "stepped" pattern. Plaster over any sheet loth: fiber, metal, or gypsum. Plaster too thin. Weak plaster. Lath not properly applied. Apply another cool of plaster. _______________ See "Weak Soft Walls" opposite page. Apply Metal Lath and replaster. 2. Cracks around and over openings. 3. Fine cracks, random pattern usually less than 12* apart. Map cracks Crazing Chip cracks Fine cracks 4. Crack at wall or ceiling angles. 5. Ceiling cracks not due to any of the above causes, or to structural failures. 1. Water soluble mildew-like fuzz on surface generally white but may be colored. Can be brushed off.__________ 2. Streaky discolorations. Plaster over brick clay tile, Lintel construction is poor. gypsum tile or cement block. Improper door buck construction. Plaster over gypsum lath and other bases (except rarely metal loth). Plaster too thin. Weak plaster. Failure to use Striplath. Expansion of wood frames. Crocks in gauged lime putty over gypsum base coat. Insufficient gauging piaster. Base coat too wet or too dry when finished. Insufficient trowelling. Slow set gouging plaster. Cracks in base coat over brick, day tile, gypsum tile or cement block. Shrinkage due to high suction. Undersanding of base coot. Plaster over gypsum lath. Thin plaster coat, or failure to use Comerite, or poor lumber in framing. Plaster over brick, clay tile Failure to wedge at ceiling, or to or gypsum tile. interlock or tie wolls together. Plaster on metal lath or gypsum loth. Metoi loth too light, not lapped or not properly tied.___________________ Thermal shock. Plaster on metal lath or gyp Improper spacing of channels. sum lath on channel frame. Thermal shock. Base coat or finish piaster over concrete, brick, or cloy tile. Efflorescence. As masonry units dry out, water-soluble salts from the masonry are being deposited on the surface of the plaster.________________ Lime finishes gauged with gauging plaster or with Keenes Cement. Lime and gauging not thoroughly mixed. Too much water used in trowelling. Efflorescence from masonry. Dirty tools or dirty water. 3. Streaked--joinings show. 'Slobbers." 4. Light and dark spots due to causes other than "dry out." 5. "Fops"--peak-like projec tions which fall out making little craters or pits; often with fine radial cracks. 6. Some as IS) above except pit is discolored tan or greenish ton. 7, Blisters (do not confuse with (5) above). Gypsum trowel finish. Float finish. Lime base coats and finish. Gypsum base coats and finishes. Gauged lime putty finish. Improper trowelling--too much water on brush. Dirty water._________________ Improper floating or too much water used in floating.______________________ Variable suction in bosecoot. Unslaked lime in mortar which slakes and swells after it is applied. Retarder spots. Lumpy or undissolved retarder added at job. Retarder lumps swell or "pop" when wet.______ Base too green, insufficient suction; or too much water used in trowelling. Finish lime too plastic. 8. Uneven color (not due to texture shadows). 9. Uneven color--light, or "ftot" spots in light colors {See 1 3 below).______ _ 10. Uneven color--dark colors. 11. Yellow surface stains"yellowing." I 2. Paint peels (new work). Gypsum trowel finish. Interior colored plaster finishes. Oil paint over gauged lime putty finish. Any colored paint over any piaster finish._______ Any finish over any plaster base. Oil paint over any finish. Base coat too wet when finish applied._______________________ Uneven absorption of base coat, or too much water used in finishing, or dirty box and tools, or variation in water content of successive batches. Finish not dry. Painted too soon after plastering (alkali in lime saponifies paint); or, pigment not lime-proof._____________ Color variation due to non-uniform absorption. Binder strikes in unevenly. Contaminated sand. Burning green wood in fireplace. Open gas heaters not vented to outside. _______________ Tar paper back of piaster base. Creosote treated framing lumber, tar, or tor derivatives used around job. Weak finish (worked thru set). Plaster not dry when painted. 13. Paint peels (old work). Any point over any finish. Previous coats of calcimine not Remedy--patch. Prevention--follow manufacturers1 specifications. Apply another coot of plaster. See "Weak Soft Walls" opposite page. Cut out and repair. Prime frames--cut bosecoot free of ground. Strip off finish and reploster with correct mix. Strip off finish and refinish over partially dry bosecoot. Water trowel sufficiently. Add moulding plotter or accelerator to gouging. Spray water on masonry to reduce suction. Remove plaster and replaster with correct mix offer adjusting suction. Cut out and patch. Add Comerite if possible. Prevent by correct construction. Prevented by following manufacturers' specifications. Control (ob temperatures from sudden change. Prevent by proper spacing. Prevent by job temperature control. Eliminate source of moisture, furr, lath, and replaster. Prevented by thorough mixing. Remedied by pointing with white TEXOUTE Imperial paint. Point with white TEXOUTE Imperial Point. See condition 1, above. Wash tools and obtain dean water. Remedied by pointing as above.____________ Paint with white TEXOUTE Imperial paint. Paint with TEXOUTE imperial paint to get uniform color. Dampen bosecoot uniformly. Remove core of "pops" and patch. Prevented by using double hydrated lime. Cut out spots and patch. Prevented by screening retarder thru 40 mesh screen. After finish has "set," trowel with very little wafer. Cut putty with small amount fine white sand or increase amount of gouging plaster. After finish begins to "set," trowel with very little water. Prevented by following specifications. Remedied by painting with TEXOUTE Imperial paint. Ventilate to dry woll properly. Repaint with TEXOUTE primer and TEXOUTE paint. Apply TEXOUTE Sealer and repaint. Prevent by using deon sand. Improve droft to stop smoke. Vent heaters to outside. Use asphalt paper. Avoid source of air contamination. Seal with TEXOUTE Sealer. Redecorate. Patch with patching piaster and paint with TEXOUTE paint. Repaint after areas are completely dry and loose point removed. Wah thrtfrtuflKlw tD oC3 to oo A 1 I _3 It Wtll L t "SET" AND WORKING QUALITIES uu-HV'. u1 "" ' ^ ^Mcondition. ;i^L -----.MATERIALS "VII . . CAUSE ........ 1. Soft, white, chalky jurfocet, occurring during hot, dry weather, usually neor openings. Gypsum base coat over any plaster base. Dry-out. Too much ventilation has re moved water before piaster could set. 2. Soft, dark, damp surfaces occurring during damp weather. 3. Soft (exactly as 2 above), but occurring in freezing weather. 4. Soft, weak wall. Condition general--not spotty nor due to slow set. 5. Soft, weak wall. Gypsum base coat over any plaster base. Gypsum base coat over any plaster base. Sweat-out. Too little ventilation has allowed woter to remain in wall after plaster set. Some of plaster has re-dissolved. Frozen plaster. Gypsum base coat over any plaster base. Use of too much aggregate. Gypsum trowel finish over any base coat. Dry-out or retempered finish. 6. Soft, weak wall. 1. Separating from piaster base. 2. Separating from piaster base. Gauged lime putty finish over any base. Gypsum plaster over gypsum lath or fiber insulating lath. Gypsum piaster over metal lath. Insufficient gauging plaster, retempered material, or insufficient trowelling. Too much aggregate, freezing, or addition of lime or Portland cement. Too much aggregate. Freezing. Lack of fiber. 3. Separating from piaster base. Gypsum plaster over masonry. Excessive suction. Masonry non-absorbent; has glazed surface. Efflorescence. ... 4. Separating from plaster base. 5. Finish separating from brown coat. Gypsum plaster over concrete. Gypsum bond plaster over concrete. Gauged lime putty finish over gypsum brown coat. 6. Finish separating from brown coat. Gypsum float and trowel finish over gypsum brown coat. 7. Finish separating from brown coat. Colored interior finishes over brown coat. 1. Soft walls for over 6 hours after application. Gypsum base coot over any ploster base. 2. Sets in box or sets on wall before it can be darbied or straightened. Gypsum base coat over any base. 3. Works hard or "short." Will not spread. Does not carry proper amount of sand. 4. Works hard or "short." Will not spread. 5. Tough and short working, rubbery or lumpy lime putty. Gypsum base coat over any plaster base. Gypsum base coat over any plaster base. Gauged lime putty over gypsum base coat. 6. Lack of uniformity in set. 7. Finish works hard. Gouged lime putty over gypsum base coat. Gypsum finishes over base coat. Use of ordinary gypsum plaster. Surface oily, too smooth, dirty, or efflorescing. Brown coat too smooth, too dry, too wet or too weak; finish improperly applied; incomplete hydration of finish lime. Brown coat too smooth. Brown coat too dry. Brown coat too weak. Finish improperly applied. Brown coat not broomed. Thin finish not ground in. Brown coot too weak. Dry-out, sweat-out, frozen plaster, over-sanding, sand too fine, or dirty sand. Slow set due to error in manufacture. Slow set due to poor sand or poor water. Quick set due to dirty water, tools and mixing equipment. Mixing too long. Quick set due to poor sand. Quick set due to error in manufacture. Quick set due to machine mixing. Aged or badly stored ploster. Over-sanding. Old material partially carbonated; warehoused too long. Improper soaking, aging or slaking. Low temperatures. Unusual temperatures. Improper gauging. Mixed too stiff. Bqi frrift Arv --- REMEDY-DR PREVENTIC Remedy-- Penistent spraying will set-up the out areas. Prevention--Screen openings in hot, dry we< and spray during setting period if necessary Remedy--Dry the wails with heat and ventilation. Prevention--Heat and ventilate as soon as plaster has set. . *. Close building, supply heat. When plaster he set, continue heat and ventilate. No remedy. Prevent by use of proper amour of aggregate. -_ If dry-out treat as condition (1) above. Trow* well when set. If retempered, no remedy except tear off ' and refinish. No remedy except to remove finish and replaster. No remedy except to replaster. Replaster with correct mix. Thaw and allow to set and dry, or replaster. Replaster with more fiber added, or use extre fibered plaster. - ' Dampen masonry surfaces. No remedy. Prevent by hacking masonry surface. * ' * Eliminate source of moisture. Furr, lath and replaster. r* --: Remove and replaster with BONDCRETE. Remove ploster. Clean and roughen surface. Reploster. Where brown coot is cause, strip off finish, correct condition of brown coat and replaster. Where finish is cause, reflnrsh properly using completely hydrated lime. Roughen brown coot. Dampen brown coat until half green. Strip down to lath and reploster. Apply as directed. Roughen brown coat and refinish. Finish following application directions. Correct condition of base coat and re-finish. See "Weak, Soft Walls" above. Send samples to manufacturers' representative. Obtain good sand and water or accelerate plaster. Use clean water, tools, equipment. Reduce mixing time. Use good washed sand or add retarder. Add retarder. Send samples to manufactut representative. - 1 Add retarder. i Get fresh plaster, or use equal parts fresh aged plaster, or use less sand. j G3 Q (J IT! ^ < Correct conditions using proper proportion} No remedy. Can be used for masons lime.< 1-4 O O ^ No remedy. Prevented by proper preparation. Do not soak at temperatures below 40 F, Use quick set gauging or heat building in cold weather. Use slow set gouging in hot weather. Use proper type ond amount of gauging plaster Use more water. ?: > 26 y USG Plastering Bases and Plastering Systems tried and tested essentials for successful wall and ceiling construction Covered up, hidden from sight by base coat plaster, finish coat and decoration in the com pleted job, the plaster base and the partition structure must be RIGHT or the job may go wrong. Through almost fifty years of constant research, the United States Gypsum Company has devel oped the plaster base materials and partition construction methods best suited to every situation. ROCKLATH plaster base--plain, perforated or in sulating--is today the most widely used plastering base. Metal lath -- including USG COLOR-RlTE metal lath--is second in variety of uses and vol ume produced. USG PYROBAR, precast gypsum partition tile, precision molded and 30 to 50% lighter than comparable products, is the ideal partition and plaster base material for some types of installation, such as large office buildings. Hol low partitions for concealing pipes, ducts, etc., are best made by USG TRUSSTEEL Studs supportin'-* USG Color-Rite metal lath or ROCKLATH. F ca maximum savings in floor space, the USG 2" Soi 2 Partition Systems are increasingly favored by pr W gressive architects and builders. o There is a tried and tested U.S.G. wall constri 0* tion system and material for every type of job. as Jl J] `J. Plaster Bases G r PS U M . \) -ur- B B 0I2 1007 28 ROCKLATH plaster base is a gypsum lath made in broad flat units. The fibered gypsum core is faced on sides and long edges with specially manufactured paper. Rocklath has an incombustible gypsum core, and will not transmit temperatures much in excess of 212 F. until completely calcined. Tests by the National Bu reau of Standards show that gypsum plaster bonds with Rocklath with a factor of safety of 144; a pull of 864 pounds per square foot is required to separate plaster from gypsum lath. The low cost of Rocklath, its ease and speed of erection as well as the savings in plaster it permits, have made this plaster base the standard of value throughout the country. Sizes--16 x 48 inches, % or lA inch thick. (Also made 16K" wide in Pacific Coast areas.) Packaged 6 pieces or 32 square feet per bundle. (Packaged 5 pieces, 3 sq. yds. per bundle in Pacific Coast areas.) Perforated ROCKLATH plaster base is identical in all respects with plain Rocklath, except that perforations are provided at regular intervals. These perforations allow the applied plaster to "mushroom" through the holes and form rivets to mechanically key the plaster to the Rocklath, thus effecting both a mechanical and a chemical bond. As a result of this dual bond, bearing partitions built of wood studs, perforated Rocklath and gypsum plas ter sanded 1:2; 1:2, received a fire-resistive rating of one hour in tests conducted by the National Bureau of Standards. Perforated Rocklath plaster base is cut, fitted and applied with all of the speed and economy of plain Rocklath. However, the perforations in perforated Rocklath encourage application of the proper thick ness of plaster and reduce droppings and wastage. Sizes and Packaging--Same as Plain Rocklath. I ; j ' Long Length ROCKLATH plaster base is manufactured for two specific purposes: 1. For use in the 2-inch Solid Rocklath and Plaster Partition System. This Rocklath is Vz inch thick, 24 inches wide, and comes in ceiling height lengths up to 12', with longitudinal V-joint edges. For a complete description of this studless, non-load bear ing partition system, see page 50 of this Directory. 2. For use on furred masonry walls. Long Length R'lath is manufactured H" thick, 24" wide, s C3 edged, in ceiling height lengths up to 12 feet. Length Insulating Rocklath, manufactured i same sizes, has a sheet of bright aluminun ^ laminated to the back side at the mill. O O 00 Insulating ROCKLATH plaster base is manufactured by attaching a sheet of bright aluminum foil to the back of plain 16" x 48" or H" Long Length Rocklath. This lath, with the foil facing the stud space, has all of the advantages of plain Rocklath listed above, plus insula tion against heat and cold. It also provides an effective barrier to the passage of water vapor. With a 24-inch air space next to the foil, Insulating Rocklath plaster base offers thermal insulation equiva lent to that of 1'2-inch fiber insulation board. Aluminum foil is one of the best vapor barriers known; its use on the back side of Rocklath on all exterior walls and ceilings will effectively safeguard against harmful con densation in stud spaces. Such condensation can ruin or damage interior decoration, cause exterior paint failure, and possible rotting of framing members. See pages 30-31 for the complete story of Insulating ROCKLATH. Application of 16"x 48" ROCKLATH plaster base Nail-on construction Apply Rocklath face out, with the long dimension at right angles to the framing members. On walls, make end joints fall on different supports in alternate courses. On ceilings, stagger end joints as for side walls, or erect Rocklath so that the end joints are made con tinuous on a support, in which case end joints should be covered with 3 inch Striplath and the long or edge joints should be off-set or staggered. In all cases butt Rocklath joints together. Space nails approximately 4" apart. 5 nails per lath, per support, using IVs", 13 gauge, blued H" flat head, smooth diamond point nails. Cut accurately and fit Rocklath neatly around all electric outlet boxes, etc. Reinforce all re-entrant angles with Cornerite over the Rocklath. Fasten the Cornerite only sufficiently to retain its position until secured by the plaster. Apply Cornerbead to all exterior angles, nailing it through to the framing. H" Rocklath is designed for application to studding or other supports not exceeding 16" on centers. Use Vi" Rocklath for framing members over 16" and up to 24" on centers. Rocklath, a gypsum plaster base, is for use with gypsum plaster only. It is not intended as a base for the application of lime or portland cement plaster. ^rL*iL&'r*.' obtained with ROCKLATH plaster base: " '................................. _ . . ... . .......................... Fireproof--Rocklath has a gypsum core which is.in- ^ combustible. Perforated ROCKLATH, with Virqf\Qypsum ~ ~ plaster sanded 1:2; 1:2, is used for partitions jwhere ^' A- one-hour fire ratings are required....... Resistance to sound transmission --Wood sfcjd partitions with ROCKLATH and gypsum plaster oh both sides have a favorable Sound Transmission Loss rating. :-rr- . aFor unusual resistance to sound transmission see; ROCK. LATH Resilient System, pages 44-45. ' y-vC---'5?" " ...Strong Bond--The bonding strength of gypswnplas-. ter to Rocklath is unusually high--farjfiigher^than is ^fA. required to meet adequate constructionstandards/^ Structurally Strong--The' -plaster base add appreciable resistance tblgteraf distortion of the framing members, and when pldstered ff'eYLSfc' construction gives high transverse strength betweeh lfram- . .... .... . .- Economical--Rocklath Is low in cost. Labor cost Is AT (For Clip Attachment systems, see pages 42-45. For solid partitions using ROCKLATH and plaster, see pages 50-51.) 30 i INSULATING ROCKLATH J A fireproof gypsum lath with all the advantages of plain ROCKLATH described on page 28. Effective insulation against heat and cold. A superior vapor barrier that helps keep harmful quantities of moisture from entering wall spaces, thus saving the framework from damaging con- ; densation. ^ ^ ^ . Speed and economy in building. Lath, insulation and vapor barrier applied in one operation. Application To function effectively as insulation, Insulating Rocklath plaster base should be installed with at least a %" air space between the inner wall and the outer wall. The aluminum foil faces the outer wall. Otherwise 16" x 48" Insulating Rocklath is applied in the same manner as plain or perforated Rocklath. See page 29 for application directions. Where to use Insulating Rocklath is used to provide thermal insu lation in exterior walls and top floor ceilings, effectively retaining much furnace heat in winter and reflecting a high proportion of sun s heat in summer. For these reasons it is used in all climates. Insulating Rocklath plaster base provides an effi cient vapor barrier, and for that purpose is recom mended for all exterior walls and ceilings in climates where below-freezing weather occurs for extended periods of time. Insulating: ROCKLATH' . .. Does not: "store-up" as much summer heat. . . . Meets normal lending requirements of FHA, banks,: building: and: loan associations, and other sources of mortgage funds. ... Has great fire resistance. .. because gypsum is incombustible. . ... Is not harmfully affected by time, decay, or normal moisture conditions ... has endurance similar to that of the mineral gypsum in its natural state. ... Resists corrosion. There's little loss of efficiency through the years with Insulating ROCKIATH-- because the; aluminum foil adequately re tains its ability to resist vapor and reflect heat. Insulating Rocklath plaster base wilj^j continue to provide protection for the life o; the building. ...Has negligible-expansion as compared t other normal insulating laths.. B B01 ROCKLATH Protection Against Condensation Moisture is dangerous. Condensation of moisture in exterior walls is a common cause of peeled paint, warped siding, rotted studding. During periods of low winter temperatures, as much as 2Vi gallons of water a day may condense in each 1000 square feet of exterior wall that is not protected by a vapor barrier. Insulating Rocklath prevents up to 95% of this condensation. A sheet of aluminum foil laminated to the Rocklath plaster base at the mill keeps most of the warm, moisture-laden vapor within the house during cold weather. This aluminum foil is one of the most efficient vapor barriers known! During the winter season, moisture within the build ing is needed to maintain proper, comfortable humiditv --and property owners can't afford to risk the damage that may result if this water vapor is allowed to escape and condense in exterior walls. Comfort and Economy of Insulation Insulation keeps homes warmer in winter, cooler in summer--more comfortable all year 'round. The greater comfort enjoyed in a house protected with effective insulation is one of the reasons such houses are worth more than houses that lack this protection. And--it alivars costs less to heat the insulated house! In most cases, the cost of insulation has been more than paid for by the savings in fuel bills over just a few years. In summer, it makes interior temperatures as much as 15 cooler. When properly installed with at least a ?i-inch air space next to the foil. Insulating Rocklath plaster base has the same insulating value as a full half inch of fiber insulating board similarly installed. When used on horizontal surfaces, its insulating value is increased more than 3 times in retarding downward flow of at --an important feature when insulating ceilings ac . :st summer heat! It is one of the least expensive tvpes of insulation, because the insulation is installed with the plaster base at no added installation cost. It lasts the lifetime of the building! Insulation for Solid Masonry Exterior Wails In a masonry wall of conventional construction where 1-inch furring strips are used, there is no room for bulky blanket or batt type insulation. With Insulating Rocklath plaster base, positive insulation of proven value can be provided in walls of this tvpe and the plaster base, insulation, and vapor barrier are installed in one operation, at one application cost. Insulating Rocklath is a practical wav to insulate as well as provide a proper vapor barrier for masonrv walls. (a) Water vapor readily pastas through unpro tected exterior walls. (b) Vapor barrier wall pre vents passage of harmful quantities of water vapor. ' (b) Sun's heat readily penetrates uninsulated : wail and lop floor ceiling (left).' Insulating ROCK:T; UTH (right) impedes passago of sun's heat. O 0 1. Fireproof--Fireproof ratings are shown in data table opposite. 2. Lightweight -- 30 per cent to 50 per cent lighter than other commonly used masonry units. See table on opposite page. 3. Plaster Bond--A safety factor of 173. 4. Saves Plaster--Large size machine-moulded units lay up accurately. Grounds are Vi inch in stead of V* inch or % inch. ' >> ' -:~Y:V. . ; 5. Resistant to Sound Transmission--See table opposite. . ; 6. Low in Cost Because: Material cost is low-- ` : --large units lay up fast--light weight--fewer joints--ease of cutting reduces waste. ] Pyrobar is a pre-cast gypsum tile for building non load bearing fireproof partitions. The surfaces are in dented to receive plaster. Because of the natural affin ity of plaster for Pyrobar, the bond has a safety factor of 173. Pyrobar is 30 per cent to 50 per cent lighter than most masonry partitions of approximately equal thick ness. This light weight results in reduced handling costs in the warehouse and on the job. Of even greater importance, partitions built of Pyrobar require less structural steel to support them. Because Pyrobar is machine molded, the edges and surfaces of each block are straight and true. The blocks can be laid up accurately to a straight line. The large units (2H square feet of wall surface per side of each tile) lay into a wall fast, further reducing labor costs. Since larger blocks mean fewer joints, up to 40 per cent of the mortar ordinarily used in a masonry partition is saved. Fixtures, such as sinks, etc., are easily attached with bolts and large steel washers on both sides. The bolts are set before the partition is plastered. Pyrobar can easily be cut on the job with a saw, thus reducing waste. In buildings requiring constant alterations to suit tenants' needs, such as office build- RECOMMENDATIONS Use only Red Top Cement Ploster for plastering Pyrobar and Red Top Partition Tile Cement for mortar. Portland Cement and lime mortars do not bond adequately with Pyrobar and should not be used with this product. Pyrobar should not be subjected to excessiv water or moisture. Where damp floors may I expected, use structural clay tile as a base O starter course, 1 2 inches high. flj - --,-- t--, O nj X J J 6 S J J J 1 3 1 3 1 1 1 3 3 1 ings, Pyrobar is the ideal partition material. Because Pyrobar can easily be cut and fitted on jobs of any type, it has been the accepted material for non-load bearing partitions for many years. Erection Only Red Top Partition Tile Cement should be used for mortar. Mortar should be sanded 1:3 by weight and should never be retempered. Lay first course with core holes horizontally by bed ding in mortar. Lay succeeding courses in Vi!' mortar beds, with vertical joints staggered. Anchor partitions to intersecting masonry walls with wall ties, or by in terlocking tile on alternate courses. Wedge tightly at ceiling and slush full with mortar. All chinks and crevices should be slushed full with mortar. Wood nailing blocks should be nailed to one end at each tile, before setting into wall, wherever lightweight fixtures or heavy trim, etc., are to be attached. Heavy fixtures should be secured to Pyrobar parti tions with bolts, set before plastering, using large steel washers on both sides. Size of pyrobar ' ; Partition Tile >' Limiting Partition Height 2*xl2'x30' Solid 3'xl 2'x30' Hollow 4'xl2'x30r Hollow 6'x12Vx30' Hollow 10 ft. 15ft. 17 ft. ` 30 ft. PYROBAR Partition Tile--Data . . Weight Per Sq. Ft. Partition Weight No Plaster Partition Weight 111 Plastered Partition Tile Cement Required Per M Sq. Ft. Tile ... Avg. Sound Transmission .loss in . . Decibels . ... Plastered 2 Sides ' - -A^sl .. .Fire Ratings*^^^ 11 5 lbs. 12.0 lb*. 15.5 lbs. 22.0 lbs. 20.5 lbs. ' 500 lbs. 21.0 lbs. f 700 lbs. 24.5 lbs. 900 lbs. 31.0 lbs. 1300 lbs. 38.1 Db. (2) 1 hr. (no plaster) A 2 hrs. (Plas. 2 sides) ; 1 3 hrs. (Plas. 2 sides) ,. J .. .-A.-,.. - 5 hrs. (Plas. 2 sidesj(3P 11) Plastered partition weights indude plaster on both sides of solid and hollow til*. (2) Wlwn furrtd, on* tide only, with USG No. 500 Resilient Clips supporting mnfal loth ond plasfnr (other sldo plastered direct), average Irons- mission loss Is 52.7 decibels. So 8MS Report 17, National Buroau of Standards. (3) Calculated. -y '' V -yl.i-* * M a M Mo u -l *' 34 J USG COLOR-RITE metal lath The Steel Heart of Plaster . ... A superior plaster base; Made of steel, it is exceptionally. strong.; . . . Steel mesh: reinforces .the; plaster; just as steel rodr reinforce; concrete; . . . So flexibleJhat it permits:ornamental plaster^ing that is almost impossible to achieve withany other plaster base.; Advantages of USG COLOR-RITE Metal Lath: 1. USG Color-Rite Metal Lath represents the newest development in the metal lath industry. Ends of bun dles are spray painted red for all 3.4 lb. lath, white for 2.5 lb. diamond mesh and 2.75 lb. Z-rib, blue for 4.0 lb. H" riblath. This makes warehousing, inventory and job distribution easier and positive. An architect may quickly and visually inspect a job to make sure the weight lath he specified is used. When the lather erects the colored end to the right as we recommend, the plas terer saves up to 25 per cent of his sidewall scratch coat; saves time and effort because of the uniform "drag'' on his trowel since all sheets lay in the same direction. 2. Helps assure good plastering. An over-sanded scratch coat will not key to it. Scratching with the correct mix to the proper thickness is the easiest, fastest way. 3. Thousands of openings per sq. yd. give metal lath a bulldog grip on plaster, and increase crack-resistance. 4. Full plaster thickness plus overall steel reinforce ment produces walls of maximum fire resistance. ( The all purpose metal lath, for plain and ornamental plastering. Contains approximately 11,000 openings per square yard. Trimmed square at ends. Rigid sheets provide fast, easy erection. "Self-furring" Diamond Mesh has H" indentations, 1W O.C. Sheet size: 27" x 96", 10 sheets, 20 sq. yds. per bdl. Weights available: 3.4 lb. and 2.5 lb. copper alloy steel, painted. Galvanized, available only in 3.4 lb. I W i l A more rigid lath than Diamond Mesh. Rigidity achieved by wide, solid Ts^f'bs. ihi" on centers, and bv herring bone design mesh. Ideal for double back plastering. A "plaster saving" lath--a minimum of plaster droppings. Sheet size: 24" x 96", 9 sheets, 16 sq. yds. per bdl. Weights available: 3.4 lb. and 2.75 lb. copper alloy steel, painted. i l t to A flat rib type of lath with }/%' ribs and small o :sh openings. Equally suitable for tie-on or nail-t rk. Also a plaster saving type of lath. Sheet size: 27" x 96", 10 sheets. 20 sq. yds. O bdl. Weights available: 3.4 lb. and 2.75 lb. cop steeh painted. Hoy [ f ( i A rigid, self-furring lath. Also a reinforcement for light concrete slabs. As a plastering base, permits a greater span--up to 24"--than other types. Distinguished par ticularly by the lapping or nesting feature oi outside ribs --no bulky, uneven surfaces to hinder the plasterer. Sheet size: 24" x 96", 9 sheets, 16 sq. yds. per bdl. Weights available: 4.0 lb. and 3.4 lb. copper alloy steel, painted. Most effective as a centering and reinforcement for concrete roofs and floors and for use on much greater spans than are permissible with riblath. Seldom used as a plaster base. It is also used for column and beam protection, tanks, fences, walls, etc. Sheet sizes: 24" x 6', 7', 8', 9', 10', 11', and 12' (8', 10', and 12' sheets are stocked). Weights available: .75 lb. and .60 lb. per sq. ft. Copper alloy steel, painted. So called because of its original use as a reinforcing for concrete burial vaults. Its large A" wide diamond makes it suitable as a reinforcement for many types of light concrete slab work, and as a stucco base. Also available in self-furring type. Sheet size: 24" x 96", 9 sheets, 16 sq. yds. per bdl. Weights available: 3.4 lb. and 2.5 lb. copper alloy steel, painted. Expanded steel mesh for stucco work. Diagonal strands enable the stucco to resist cracking due to shrinkage, temperature changes and wind stresses. Also provides protection against impact. Apply with USG Stucco Furring Nails. Sheet size: 48" x 99", 10 sheets, 36% sq. yds. per bdl. Nails: \A" Stucco Furring nails, 850 nails per box (sufficient for 50 sq. yds.), 12 boxes per carton. 1 Weights available: 3.6 and 1.8 lb. copper alloy steel, painted. 1 A 3" wide strip of Diamond Mesh lath used for a variety of purposes--stripping joints on other types of lath, reinforcing pipe chases cut in masonry partitions, 3 diagonal reinforcing over door openings, etc. Weight: 70 lbs. per 1000 lin. ft. Packaging: Master bundles of 600 lin. ft. (75 pieces of 3 8 , containing 3 separate bundles of 25 pcs. each). Size available: 3 ' wide copper alloy steel, painted. 3 '] 4 7 -- Xi I - r'--*. X--:----- 7 r. i'T.- A Diamond mesh lath angle used over gypsum lath and i j masonry (or where different plaster bases abut), and as reinforcing for inside wall and ceiling corners to help protect against corner cracks. Weights: 2" x 2"--100 lbs. per 1000 lin. ft. 3" x 3"-- 150 lbs. per 1000 lin. ft. Packaging: Master bundles of 600 ft. (75 pcs. of 8' 0") containing 3 separate bundles of 25 pcs. each. Sizes available 3" x 3" and 2" x 2" copper alloy steel, painted. Used in most "fireproof" construction as secondary structural members; for furring; as studs in non-load bearing partitions; for suspended ceilings; for orna mental work. Formed from plain steel strip and painted. Corners are square and the legs and webs are straight, free from harmful wrinkles or curvatures. Weights, Lengths and Packaging--H"--300 lbs. per 1000 lin. ft. 16' and 20' lengths, 20 pcs. per bdl. 1 Yi"-- 475 lbs. per 1000 lin. ft., 16' and 20' lengths, 10 pcs. per bdl. The wide, sturdy expanded flanges provide a valuable feature for rough irregular corners. They give maximum plaster reinforcement close to the nose of the bead. Lengths and Packaging--8', 9', 10', 12' lengths, packed 60 pieces per carton (6 bundles, 10 pcs. ea.) regardless of length. Shipped in cartons only. Product Designation--No. 1A 214" Expanded Flange Bead, 26 ga. galv. Weight: 204 lbs. per 1000 lin. ft. The all-purpose bead: has great flexibility. Ideal for straight corner work. By snipping one flange, may be hand-formed into almost anv corner. Corner bead clips facilitate fastening bead far back from the nose. Lengths and Packaging--8', 9', 10', and 12' lengths, shipped in cartons of 6 bdls., 10 pcs. per bdl., regard less of length. Product Designation--No. 4A--1-9/16'' flange flexible bead, 26 ga. galv. No. 9A--Corner Bead Clips (1000 pcs., 25 lbs., per box). Weight: 179 lbs. per 1000 lin. ft. K" radius nose for rounded corner construction wi exposed steel surface. Preferred in hospitals, pub buildings. Often applied with corner bead clips. O Lengths and Packaging--(shipped in crates, or in bi w dies of 10 pcs.) Weight: 245 lbs. per 1000 lin. ft. ^ 8'--560 ft. per crate 10'--500 ft. per crate o 9'--540 ft. per crate 12'--600 ft. per crate Product Designation--No. 5A--Short flange Bull N. Bead 26 ga. galv. No. 9A--Corner Bead Clips (1000 pcs., 25 lbs., per box). J J J J A superior type H" radius bead. Easily fastened to un even and irregular surfaces. Expansion flanges flex in and out to accommodate irregularities. Easily plumbed. Lengths and Packaging--(shipped in cartons only): J 7', 8', 9', 10' and 12' lengths. Packed 30 pcs. per carton regardless of length. H Product Designation--No. 10A 2A" Expanded Flange Bull Nose Bead 26ga. galv. Weight: 375 lbs. per M lin. ft. I M Flush type. Used as a dividing strip or screed between plastered surfaces and cement or terrazzo surfaces. Ex|| panded flange makes it suitable for uneven surfaces. Weight--230 lbs. per 1000 sq. ft. Lengths and Packaging--10 ft. lengths only. 500 ft. per J crate. Shipped in full crates only. Product Designation--No. 3A Expanded Flange Base J Ground, 26 ga. galv. A" grounds only. -- ^ The most popular type base ground. Flush type. Can be shimmed out from the surface if more than A," r grounds are necessary. Weight--160 lbs. per 1000 lin. ft. Lengths and Packaging--10 ft. lengths, and A" grounds only. Packed 60 pcs. per ctn. (6 bdls.--10 pcs. ea.) jl Shipped in cartons only. The offset design provides for a A" plaster ground Jj above the screed face and for 1" thick cement or terrazzo below the point. ^ Weight--195 lbs. per 1000 lin. ft. Lengths and Packaging--10 ft. lengths only. 1000 ft. n per crate. Shipped crated only. Ji Product Designation--No. 7A--Curved Point Base Ground 26 ga. galv. A" grounds only. ^ Erected before plastering. After plastering, only a line opening is visible. Also acts as a plaster ground to Tj accomplish a uniform plaster thickness. Weight--260 lbs. per 1000 lin. ft. Lengths and Packaging--10 ft. lengths only. 1000 ft. 3 per crate. Shipped crated only. Product Designation--No. 8A Concealed Picture 1 Mould, 26 ga. galv. A" grounds only. ] Short and Expanded Flange Casing Economical, sanitary, durable steel casing for doors and windows. Four designs available: No. 4 (quarter round). No. 6 O.G. (old gothic), No. 60 (semi-square). No. 66 (square nose). Weight per 1000 lin. ft.: Expanded No. 4, 320 lbs.; Expanded No. 6, 350 lbs.; Expanded No. 60, 320 lbs.; Expanded No. 66, 320 lbs. All short flange casings, 220 lbs. Lengths and Packaging--(Shipped crated only) 7 ft. and 8 ft.--560 ft. per crate. 10 ft.--500 ft. per crate. Product Designation--No. 4, No. 6, No. 60, or No. 66 Expanded Casing, XA" and ?4" grounds, 24 ga. galv. Metal Base A flush type of metal base for use with either metal lath or gypsum lath solid plaster partitions. Made from 18 gauge plain steel and painted. Erected by snapping onto floor or wall clips. 2H" high, 2" wide. Further details on pages 51-52, and from U.S.G. representatives. Lath Attachment Clips For attaching ?s" Riblath to steel joists. Packaged 1000 per carton. No. 1 tor U2" to \V%" flanges No. 2 for 2" to 2H" flanges No. 3 for 2-7/16" to 2-11/16" flanges No. 4 for 2H" to 3K" flanges No. 5 for 3H" to 4W flanges No. 7 for 4H" to 4%" flanges Galvanized Steel Wall Ties Corrugated galvanized steel Vs" by 7", for anchoring masonry veneer to structure. Used every 6th course 16" apart in brick work. Wt. 35 lbs. per ctn. (1000). Tie and Hanger Wire 18 gauge and 16 gauge galvanized, soft annealed, for tieing metal lath to channels, and furring to runner channels. 50 and 100 lb. coils. 25 lb. hanks (28" straight lengths). 8 gauge for suspending channel run ner when spaced not more than 4'0" O.C. 1 . 4 Expanded Flange Casing No. 66 Short Flange Casing USG Metal Base Lath Attachment Clips Tie Wire Wall Ties zUnheated attic spaces in insulated homes need ventilation to prevent undesirable conden sation in the winter and to ventilate and admit cool night air in the summer. '4 .>?': . -Made of sheet aluminum. The front face and back face are stamped in one piece. The : ; . Insect screen, of heavy gauge galvannealed wire, is sandwiched between the two faces '. ond the three pieces riveted together. 'Will not rattle or rust. No painting maintenance. No X/nesting place for birds. . ;J f^'.Eosier to install because of wide nailing Ranges. More flexible and more nailable. 'Aluminum noils furnished. --'-/.vii'- v 8x8 - 8 x 12 ... 8 x 16 12 x 12 *-12 x 18 . 12 x 24 SfU'n 24 > - JOx 12 30 x 18 30 x 24 30 x 30 Pitched Roof * Masonry* Wood* Comice " Opening Size 8%x8% 8'/i x 12% 8%xl6 % 12%xl2% 12% x u% 12% x 24% 14 x 15 14 x 24 30% x 12% 30% x 18% 30% x 24% 30% x 30% 12% x 5% 18 x 8 14 x 8 14% x 4% " Free Area 42 sq. in. 63 sq. in. 84 sq. in. 99 sq. in. 148 sq. in. 199 sq. in. 143 sq. in. 233 sq. In. 260 sq. in. ' 390 sq. in. 522 sq. in. . 652 sq. in. 49 sq. in. , 72 sq. in. 72 sq. in. 36 sq. in. Shipping Weight Per Carton Plft ./v. For "''[Carton 6 8 9% 10% .A:. -6 . *5- - 6 -= 14% 16% . |3 ,. 19 . rA*-'V-.V# 11 14% 16% . 20% = 16 6% -- vi 6 5% 4 x for Foundation. . USG Coal Doors -- Consult U.S.G. representativef.T'yf o I I I i I I i r r t t 3 4-' :%y?}j':: :rs' .zyy rj -....; ,, " '- ` 'l - - ' >'/; '\^'f .'/'..- * >'''fe='-'-V.;: 'A;' 1 ' -: .-f:- v: .- . *. r'-rv.-. -....*i i ~ :'S*S. J'fTA.'k: USG Ready-formed Metal Arches The economical way to modernize old fashioned woodtrimmed openings. Also ideal for new construction. They can be made to fit any size opening and partitions of any thickness. No forms to make. No corner bead to bend or shape by hand. Each metal arch gives a true, symmetrical, beautifully arched opening. Arches are individually packed in strong corrugated cartons, each carton containing illustrated, easy-tofollow directions. Three styles: Half circle, Gothic, or Elliptic. Seven sizes for 2'6" to 6' openings. Style of Arch (for 2x4 Studding) No. 1 1 Half circle design, 10" radius No. 22 Half circle design, 1 SVa" radius No. 33 Gothic design for 2'6" opening No. 44 Gothic design for 4'0" opening No. 36 Elliptic design for 3'0" opening No. 55 Elliptic design for 5'0" opening No. 66 Elliptic design for 6'0" opening No. of Pieces Per Set 2 2 4 4 4 4 4 TRIPLE-VENT Basement Sash and Screens j;-.. 1 Sturdily designed for positive, weathertight and easy, i. long time performance. Three ventilating positions. Top position avoids di rect bottom drafts. Bottom position aims incoming air at the floor. Mid-position gives clear circulation top 3 and bottom. Each light is factory lined with cork strips for puttv- less glazing. Glazing clips supplied with each sash. Can n j he putty-glazed if desired. 3 Screens have strong, cold rolled steel frame painted gray. Bronze wire screen cloth. Packed with clips pro vided for attaching to sash. 1 No. of Size o : Glass Masonry Opening Sash Size Weight Lights Width Height Width Height l 211512 15 Vi lbs. 2 15" 12" 3 3'A" 15" 2L 1516 1 63A lbs. 2 15" 16" 3314" 19" 21 1520 18'/2 lbs. 2 15" 20" 3 3 Vi" 23" flB 0l2 1019 40 BUNDLING AND WEIGHT TABLES, GENERAL DATA Diamond Mesh Lath, Va" Rib Lath and '/s" Flat Rib Lath 24 Inch Width ------ --------------,---- ----------- ' Weight of Lath '' " 1 2 3 4 5 6 7 8 9 10 11 12. 13 14 15 16 17 18 19 I 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50-i Yards 2.5 lb. 2.75 lb. "'"I 16 - 40 32 80 44 88 48 120 132 64 160 176 80 200 220 96 240 264 112 280 308 128 320 352 144 360 396 160 400 440 176 440 484 192 480 528 208 520 572 224 560 616 240 600 660 256 640 704 272 ... 680 748 288 720 792 304 760 836 320 800 880 336 . 840 924 352 880 968 368 920 1012 384 960 1056 400 1000 1100 416 1040 1144 432 1080 1188 448 1120 1232 464 1160 1276 480 1200 1320 496 1240 1364 512 1280 1408 528 1320 1452 544 1360 1496 560 1400 1540 575 1440 1584 592 1480 1628 608 1520 : 1672 624 1560 1716 640 ; 1600 V 1760 656 1640 1804 672 1680 1848 688 1720 1892 704 1760 1936 720 1800 1980 736 1840 2024 752 1880 2068 768 1920 2112 784 1960 2156 800 __ j .... 2000 2200 3.4 lb. 54.4 108.8 163.2 217.6 272.0 326.4 380.8 435.2 489.6 544.0 598.4 652.8 707.2 761.6 816.0 870.4 924.8 979.2 1033.6 1088.0 1142.4 1196.8 1251.2 - 1305.6 1360.0 1414.4 1468.8 1523.2 1577.6 1632.0 1686.4 1740.8 1795.2 1849.6 1904.0 1958.4 2012.8 j 2067.2 . 2121.6 2176.0 " 2230.4 2284.8 2339.2 2393.6 2448.0 2502.4 2556.8 2611.2 2665.6 2720.0 4.0 lb. 64 128 192 256 320 384 448 512 576 640 704 768 832 896 960 1024 , >088.^ 1152 1216 " 1280 1344 .-.f'r1408 " U72'1 1536 ' 1600 " 1664 1728 " 1792 1856 1 1920 1984 2048 2112 2176 2240 2304 J 2368 ; 2432 2496 2560 ' | 2624 . 2688 2752 2816 ; 2880 2944 3008 3072 3136 3200 27 Inch Width No. of Bundles Yards Weight of Lath 2.5 lb. 2.75 lb. 3.4 lb. 1 20 50 ,55 2 40 100 110 3 60 150 165 4 80 200 220 5 100 250 275 6 120 300 330 7 140 350 385 8 160 400 440. 9 180 450 495 10 200 500 550 1 I 220 550 605 12 240 600 660 13 260 650 715 14 280 700 770 952 A 15 16 300 320 750 800 825 880 1020 1088 1J .<1 17 340 850 935 1156 18 360 900 990 T224 19 380 950 1045 1292 20 400 1000 *1100 1360 21 420 1050 1155 1428 22 440 1100 1210 w, 1495 *4 23 460 M50 1265 jl564 24 480 1200 1320 ' 1632 25 =500 1250 1375 3*1*700 J 26 520 1300 1430 iE*7 27 540 1350 1485 28 560 1400 1540 29 580 1450 1594 30 600 1500 1650 31 620 1550 1705 32 640 1600 1760 33 660 1650 1815 34 680 1700 1870 35 700 1750 1925 36 ;720 1800 1980 37 740 1850 2035 38 760 1900 2090. 39 780 1950 2145 40 800 2000 ; 2200 41 820 2050 2255 42 840 2100 2310 ' 43 860 2150 2365 44 880 2200 2420 ' *T2992 45 900 2250 2475,; 46 920 2300 2530 ; vS-3128 47 940 2350 2585 1&3I96. 48 960 2400 2640 ' WS264 49 980 2450 2695 r; ff3332' 50 1000 2500 2750 3400 Lathing Accessories Bundling, crafing, packaging and weight data are included with the description of products on the preceding pages. BB012 1020 J i: 1 Application Instructions, Nail-on Jobs 1. Lath ceilings first. Carry sheets six inches on down the nels (horizontal or vertical construction) use 4 strands of 18-ga., or 2 strands of 16-ga., galvanized annealed wire. walls. If metal lath is not used on ceiling but is used on Estimating Quantities 1 sidewalls, it should be carried out six inches on joists. 2. Apply with long dimension running across the studs For Suspended Ceilings or joists. Secure bv nailing or stapling along studs or The following "rule of thumb" method will be found l joists at not more than six-inch intervals. 3. On sidewalls, lathing begins at the top and is con helpful in making a quick quantity estimate. 1. Determine surface area in square feet. Example: ceil tinued downward. Lower sheets should always overlap ing area 30x100 feet = 3,000 square feet. Divide by 9 to j the upper sheets. Diamond mesh lath should be carried around corners to at least one stud spacing. determine square yards of metal lath required. Assume standard suspended ceiling construction of i 4. Riblath on both sidewalls and ceilings should be ap plied with ribs against the supports. 5. Diamond mesh should be lapped at sides not less than l/2 inch, and at ends not less than one inch. Riblath should be lapped at sides by nesting outside ribs, 1 Vi" runner channels 4 feet apart, and H" furring channels either 12", 16" or 24" apart, depending on type and weight of metal lath used. 2. Quantity of 1 Vt" channels 4 feet apart--divide square foot area by 4. (3.000 divided by 4 = 750 lineal feet.) i and at ends by lapping not less than one inch. 6. All side laps should be tied with 18-gauge tie wire at 3. Quantity of %" channels 12" apart--multiply square foot area by 1. (3,000 x 1=3,000 lineal feet.) least midway between joist or stud supports, but at not 4. Quantity of %" channels 16" apart--multiply i more than 9 inch intervals. 7. Ends of sheets generally should occur over supports; square foot area by H. (3,000 x % = 2,250 lineal feet.) 5. Quantity of channels 24" apart -- multiply if between, ends of sheets should be securely laced square foot area by M. (3,000 x H = 1,500 lineal feet.) i together with 18-gauge tie wire. 8. Staggering is preferable but is not essential. 6. Figure tie wire at approximately 10 pounds per 100 square yards of lathing. 7. Lathing nails--for 16" stud spacing, nailing 6"o.c. ] Nailing Diamond Mesh and Flat Riblath On walls--use 4d common nails driven and bent to engage three strands, or 1" roofing nails with requires approximately 17 nails per sq. yd. Large Headed Barbed Length Gauge No. per lb. ] heads driven home, or 1" No. 14 gauge wire staples. On ceilings--use VA" No. 11 gauge (%" head) barbed Roofing Nails 7/\t head 1' 1 V4' No. 1 1 No. I 1 275 188 roofing nails driven home. Common Nails 4d No. 1 2'/j 316 3 Vb" Riblath 6d No. 1 1 Vi For Partitions (Per 100 Sq. Yds.) 181 On walls--use 4d common nails driven through rib, Approx. Lineal Feet of 1 or 6d common nails driven H" and bent over rib. On ceilings--use 1M" No. 11 gauge (%" head) barbed roofing nails driven- through the rib. Ceiling Height 7 ft. Spacing of Studs 12 in. Lineal Feet Floor and Ceiling of Studs Required Members Required 910 ft. 260 ft. 8 ft. 12 in. 912 ft. 225 ft. ] For Tie-up Work For tieing metal lath to channels--No. 18-gauge gal 9 ft. 10 ft. 1 1 ft. 16 in. 20 in. 24 in. 684 ft. 550 ft. 460 ft. 200 ft. 180 ft. 164 ft. vanized annealed tie wire. For tieing channels to chan Lath one side -- 100 sq. yds. Lath two sides -- 200 sq. yds. i J 1 Weight Erection Data Maximum Allowable Spacings I Type of Lath per Square Yard Type of Steel Size Sheets Wood Vertical Supports Metal Solid Partitions Others Horizontal Supports Wood or Concrete Metal Diamond Mesh 2.5 lb. Copper Alloy 27"x96" 14" 14" Diamond Mesh 3.4 lb. Copper Alloy 27*x94' 14' 14' Z-Rib 12) I Z-Rib (2| H' Rib 2.75 lb. 3.4 lb. 3.4 lb. Copper Alloy Copper Alloy Copper Alloy 27'x94' 27'x96' 24'x96' 14' 19' 24' 14' 24' 24' Yt9 Rib 4.0 lb. Copper Alloy 24'x94' 24' 24* 12" (!) HI 14' 14' 13'/i' 14' 14' 12' 19' 19' 19' 24' 24" 24' 24' 24' 24' STUCCOMESH 1.8 lb. Copper Alloy 48"x99" 14' I STUCCOMESH 3.4 lb. Copper Alloy 48'x99* 14' (1) Not recommended, except for fireproofing of steel shapes. (2) Or 4-mesh Z-Rib. o Iw BRIDJOINT Lathing System The Bridjoint Lathing System uses Bridjoint clips to apply Rocklath plaster base on walls and ceilings, and is so designed that the ends of the lath fall between and not on the framing members. This system can be used with Plain, Perforated or Insulating Rocklath plaster base. Removal of the lath ends from the framing members increases the resistance to cracking at the most vulner able points. Because lath ends meet between studding or joists, framing members need not be exactly 16" o.c. Lath ends are not nailed -- system can be used with nailable steel joists or studs. Twenty-five per cent less nailing is required! Cornerite and nailing in the corners is not required. Total cost is only slightly above that of regular nail-on construction. Approximately four B-l Clips per yard are required. Multiply the lineal feet of ceiling and corner angles by 0.75 to determine number of B-2 clips. B-1 Clips The B-l Clip is used in the field application of Rocklath with the Bridjoint System. End joints of the lath should fall between framing members. Adjacent lath are attached to each other by the use of the B-l Clip. This clip is also used for the Brace-Tite Lathing System, as described on the opposite page. B-l Clips--packed 500 per carton. B-2 Clips The B-2 Clip is used for internal and external angles formed by walls and ceilings. Secure the end joints of the lath at internal and external angles with the B-2 Clip, but do not nail to the framing members. For ex ternal angles, corner bead should be wired or stapled to the lath. Do not nail the corner bead to the framing members. B-2 Clips--packed 500 per carton. BRACE-TITE B-1 Field clip B-2 Corner clip - 3. loop *rd of field dtp ii hooked over channel. On,tint covne of loth, field dip it crimped to take up clack due to (tatter dtp project ing out from wall A -1 dip it uted at each end joint at (Sown. J . Lathing System for attaching RoCKLATH plaster base to suspended ceilings s ... jiff. Onlyflnt coots* of lafh r*quir*s crimping t wJr*. Other courses ore rapidity applied by looping held dips over charm*! and Inserthook Into the eye of the preceding dip. --, ! 6* Cut lost course of ROCKLATH plaster base to width to hi remain fng space. Insert BXACE-TITE dip for this final course over previous dip, poii tight into the eye and cut off excess length. Description The Brace-Tite Lathing System is a mechanical sus pension of Rocklath plaster base from standard metal grillage {%" channels spaced not over 16" o.c.). The field clips, attached to 24" channels, support the Rocklath across the full width of the board. The spring action of the field clip pressing against the width of the board further increases its rigidity. The Brace-Tite System is easy to apply. The loop of the Brace-Tite field clip is dropped over the channel, pressed up against the lath, and hooked into the eye of the preceding field clip. Only three field clips, plus two USG Bridjoint B-l Clips, are required per sheet of Rocklath plaster base. Any standard H" cold-rolled channel may be used on conventional 12" or 16" centers. Plain, Perforated or Insulating Rocklath plaster base may be used. The Brace-Tite System may be used with any type of suspension having %" channels, not over 16" o.c. The embedded wire clip reinforces the plaster and increases crack resistance. As the Brace-Tite System requires only Vi" of plaster in two coats, its use results in economy of application. Materials Channels--USG W Cold Rolled Channels, Painted. Lath--x 16" x 48" Rocklath Plaster Base. Clips--Brace-Tite Field and Starter Clips, USG B-l Bridjoint Field Clips. Cornerite--USG Painted Cornerite. Estimating Quantities 16" spacing of J4" channels. Brace-Tite Starter Clips: one required for each channel abutting a vertical plane and at any interrup tion of this channel (such as at light troffers). None re quired at opposite end of channels. Brace-Tite Field Clips--5 to 6 per square yard. USG B-l Bridjoint Clips--4 per square yard. 12" spacing of M" channels. Brace-Tite Starter Clips--Same as for 16" spacing. Brace-Tite Field Clips--7 to 8 clips per yard. USG B-l Bridjoint Clips--Same as for 16" spacing. Packaging Brace-Tite field clips. 300 per carton, starter clips, 50 per carton, and B-l clips, 500 per carton. 63 63 iO-> PJ O nj u r v jt ,:.v5:v :v.-* ` 1 -; :rs ; ;' ? This system is a method of attachment for ROCKLATH piaster base, floating it free from the framing, or basic wail or ceiling construction, by means of resilient spring clips. y ' Floating the plastered wall free of the basic construc tion gives this system several outstanding qualities as compared with normal construction. Excellent Resistance to Sound Transmission The National Bureau of Standards assigns a Sound Transmission Loss rating of 47 decibels' to wood stud partitions with Resilient Clips and Rocklath plaster base plastered both sides. This system has received this high rating because it simply and effectively separates the structural part of the wall, stud or masonry, from the lath and plaster by means of the steel springs which permit the lath and plaster to vibrate independently, thus decreasing the energy transmitted to the structural part of the wall. This rating is 6 decibels higher than that assigned to nail-on construction using Rocklath. The resilient system using Rocklath plaster base meets F.H.A. requirements for party walls in multiple family dwellings. Maximum Crack Resistance Plaster cracking, due to normal frame movement, is greatly reduced with the resilient plaster system using Rocklath plaster base. When minor frame movement occurs, it is absorbed by the resilience of the springs in the clip. Flexibility of this system replaces rigidity of ordinary plastered walls without sacrificing strength. Economy in Redecoration Rocklath Resilient Clips hold the plaster wall ?a" away from the framework, permitting air circulation and almost complete equalization of temperatures. Un equal temperatures are the cause of most of the char acteristic streaking of plastered walls which occurs where the plaster base is directly connected with the framing members. The use of Rocklath Resilient Clips practically eliminates streaking from that cause. Flexible This system using Rocklath Resilient Clips with %" Rocklath can be applied to wood, steel or masonry. Plain, Insulating or Perforated Rocklath Plaster base can be used on walls. Only plain or Insulating Rocklath, with three-coat plastering, is recommended for ceilings supported by Resilient Clips. Alloiv scratch coat to set and dry before application of brown coat. Estimating Quantities A total of 6 clips per square yard is required. This includes the R-I field clips, and the R-2 clips required to secure internal corners. The quantity of each is esti mated as in the following example: 500 square yards x 6 clips per yard = 3,000 clips to Estimated number R-2 clips = 800 clips k Difference equals number R-l clips = 2,200 clips A) O A 1 Resilient Lathing 4. ' V"-' 1 Field Clip 1 Resilient Clip, R-l, is used for the attachment of Rocklath Plaster base to wood framing members, float ing the lath free of the framing members by means of Tl the resilient spring in the clip. The clip is nailed to the J framing members and the Rocklath is supported by the steel prongs of the clip. The R-l Clip is used only 1 in the field of the area to be covered. Packaging--R-l Clips--250 per carton. ] Corner Clip 3 Resilient Clip, R-2, is used for the attachment of Rocklath Plaster base to wood framing members at all internal corners. It provides the same spring suspen sion in corner sections as the R-l Clip provides in the 3 field. The R-l Clip is also used as the starting clip at the base of the wall. 1 Packaging--R-2 Clips--250 per carton. 1 Ceiling Channel Clip Resilient Clip, R-3, is used for the attachment of Rocklath Plaster base to ?-inch cold-rolled channels ] in ceiling construction. The clip is hooked over the channel and the Rocklath engaged in the prongs of the clip. This construction provides a ceiling floated from the metal grillage of suspended ceilings. Ji Packaging--R-3 Clips--250 per carton. 3 Wood Furring Clip Resilient Clip, R-4, is used with the Resilient System for attaching the Rocklath to wood furring strips. This clip can be nailed to the face edge of the framing member, permitting its use where obstacles in con struction prohibit the use of R-l described above. Packaging--R-4 Clips--250 per carton. J Masonry Furring Clip Resilient Clip, R-5, is used to mechanically float a Rocklath Plaster base wall or ceiling from masonry or solid concrete construction. With this system the clip provides sound transmission resistance advantages, and also furrs the plastered wall from the masonry. Packaging--R-5 Clips--200 per carton. W q jjj O U Ui ADVANTAGES 1. Reduces transmission of sound. 2. Affords greatly increased protection against cracks due to structural movement or excessive vibration. 3. "Photographing'' of joists, etc., is almost entirelyeliminated because the plaster does not come in direct contact with these supports. 4. The system can be applied to practically all types of residential and commercial construction. 5. Only five simple types of clips meet all erection re quirements . . . the system goes up quickly and easily. Standard metal lath construction follows. PACKAGING--500 clips to a carton, except No. 400: 1000 per carton. WEIGHT per thousand clips--No. 100--56 lbs. No. 200--44 lbs. No. 300--A6 lbs. No. 400--35 lbs. No. 500--lbs. X-_/ "v-J No. 100--for suspended ceilings ; ; . Furring channels 12' spacing) quantity-- '* 225 dips per 100 sq. yards. 77 furring channels 16' spacing) quantity-- ' J69 dips per 100 sq. yards. < , (Runner channels at 4' spacing) .7. . No. 200--for wood studs or joists ' Walls (dipspadng 16' along studs): .'quontity--500 dips per 100 sq. yards. y>*.Ceilings (dip spacing 12' olong joists): 'Vi quantity--675 dips per lOO sq. yards. ^ (Shids or joists at 16' spacing) ^;No. 300--for wood furring strips jjg&AfcS'SvJjiV i:.., ,t SH<! Igp^yalls fclips 16' along furring): quantity--'. y^1 Suspeniddeeda Cveeiilliinngg. - -*V'ilr3>fci?xJ'* v '/--r,*' ' .*i -- r>*"' ' *r'4'fT "** .* *'' '' WSl'V *-. *r- . ' ' - . ' 'Application of No. 100 Gip for suspended ceiling Wood Frame Construction v . 4-.-r:.a \ -> `/v t.: J .' -1. " ''y'*cHpjf> metai lath tied to rods. ' ` crete joists, and on masonry surfaces. This coo- ,,, ,y.:struction provides furring, and resilient attachment !^\^?;5iVf ff-:of ttie nietol lath." $4'.'channel wire-tied to dip; ' -i metal lath'tied to channels. . " ;j ^Ls r'-V / ... ;V- -'.'V': -y.y:yy. i W/; .-. ? -.7 ' -Viv-V", .;;C-\.*!};.-y-~ * .'*^yv No.'400--for use on TRUSSTEEL ^Jj Stud spacing 12't quantity--675 * dips , yd;: per 100 sq. yards of surface area. . Clips spaced 16' on studs. y^Stud spadng 16 > quantity--500 dips ^ , No. 500--for masonry walls and ' concrete ceilings .V,y.;.tSpodng of; V.y-';'y.Furring'. ^.oi'yChpnnels ^Spacing of Dips . Quantity Clips per 100. sq.vyds* t. . \.f -r"..'i6*' ; :. 24' ,...y ^ 450 V 18' . 450 is' :-: /4S5 : Vet!sweTififcw eifr-Vll'*> BB012 1027  Hvd'J-N-.S M:/ .-M i ~ - 31 ." - . 1 v * Uy*^* -;j.i * .' '**> The TRUSSTEEL Sfud hollow metal lath and plaster partition is sturdy, durable, and easy to erect. Pipes, ducts and conduits are easily concealed. These partitions are light in weight, fireproof and economical. .-v, Note the ease with which this sys tem accommodates pipes and ducts. The simplicity of TRUSSTEEl Stud erection is clearly illustrated here. This is a truss design stud for hollow, non-load bearing fireproof partitions. Outer chords and diagonal struts are built of round rods. As shown in the sketch, the component parts are (A) top and bottom runner tracks, (B) rod studs spot welded at all contact points, (C) attachment shoes for connecting the studs to the runners that permit up to 4" upward adjustment, (D) Metal Lath applied to {both sides of studs with 18-gauge galvanized tie wire. For Resilient Metal Lath construction, No. 400 clips can be used instead of wire. Advantages [ [Trussteel studs are built on the sound engineering principles of the truss, and make strong, rigid parti tions. Partitions of this type have been specified, job- ctested and approved for the most important jobs, under the most exacting conditions. Trussteel studs have exclusive features that result in greater economy in the erection of hollow partitions. tThey can be quickly fitted around pipes and ducts of all types, and are easily spliced. The attachment shoes cmake each stud adjustable in height to take care of varying ceiling heights. The lather requires no special tools for quick, easy erection. to a IO i-* M cO W -i. Sizes Available: Stud Width Stud Weight per 1,000 lin. ft. Track Weight per 1,000 lin. ft. Maximum Partition Height 3'/*' 4-' '"6r'v v-: 455 lbs. . ' . 4701b*. -^V::51S lbs. : . ^ 354 lbs. . 4i7ib*. . 583 lbs. V 18 ft. . ' ; 18 ft. ' - 20 ft. ' 'j / k j Stud lengths: 7'Qr to 20'0# in increment* of 3#. Runner Track*: 3!4r, 4* and 6* width* by 8'0' long. "A -vr Recommended Stud Spacing Type of Lath 2-5 lb. Diamond Mesh Lath 3.4 lb. Diamond Mesh Lath 2.75 lb. Vi' Riblath ; 3-4 lb. Vt" Ribloth --X 3.4 lb. y%` Riblath 4.0 lb. W Riblath :: . Plain or Perforated ROCKLATH Plaster base TRUSSTEEL Stud Spacing ' T" 7-'-'^ 12 inches 15 inches j, 'Cl 15 inches , / .' - . 19 inches 24 inches ' :;r A ` ^ -l 24 inches ; 18 inches J- " Erection Align the Trussteel Runner Tracks accurately to the partition layout. Securely fasten to the floor or ceiling at 16" intervals. Use Vi inch concrete stub nails for concrete slabs. Space Trussteel Studs 12", 16" or 24" on centers, according to the weight and type of metal lath to be used, and secure each stud to the runner track with two attachment shoes at both top and bottom. Shoes may be either wired or crimped to the stud. Partitions 12 feet or more in height should be braced horizontally with ZA inch channels wired permanently to the inside of the studs. This bracing should be spaced not more than 6 feet on centers vertically. Where the Trussteel Stud Partition abuts some other construction, nail, tie-wire or toggle-bolt the Runner Track to the wall. Corners and partition intersections are formed with four Trussteel Studs. Fasten two studs to each side of every door buck. Rocklath plaster base can be applied to Trussteel o r to Studs with special clips. Consult your U.S.G. repre- O sentative. W *+ ]O U O Tl?;: Km- - -r: "" -H.'':- -- * -------<' :';v> ' O /. t . : ' 1 1 , T i k (t ^ tV v ~ 'jw V- '- :>tv;yv:rf,v;.v V; .;;<> *j ' . 1. Fireproof--Composed essentially of gypsum, the . partition is fireproof. When plaster is sanded 1 to. 1,' .,... ::.(:: 1_ to 2, it receives a 1-hour fire resistance rating. . 2. Space Saving--Only 2r thick. Replaces partitions " more than twice as thick--saves up to 5% of total ' floor area. ' ; a..'; . 1 . j.; , 3- Strong--An official impact test with a 60-lb. weight travelling through a four foot fall failed to produce^ ' v a discernible crack after three successive blows.1'.'_T'|5^ 4. Economical--Actual cost is comparable with the cost of conventional wood studs with ROCKLATH plaster ii:.'base and plaster, both sides. :. *' .*r&lT*v):*, .* wtth F.H.A. r*aii?rm*nt finr rontn! fiAiitmn " ~*-3 Description The 2" Solid Rocklath and Plaster Partition is a stud less, non-load bearing partition consisting of lA" Long Length V-edge Rocklath plaster base held vertically in floor and ceiling runners and plastered on both sides with H" of plaster. The lath is braced on one side with temporary wood or V\" steel channels which are re moved just before the brown coat of plaster is applied to the braced side of the lath, and after the brown coat has set on the unbraced side. This construction is suitable for non-load bearing partitions in multi-unit homes, apartment buildings, offices, hospitals, schools and other structures. It can be used for walls up to 12 feet high. Electrical outlet boxes and conduits, plumbing fixtures and door bucks are easily installed during the erection of this partition. FIRST, nail down metal floor dips approximately 24 inches on center. The metal base side plates snap over shoulders of dips. Then grout gypsum piaster into base section. V . - SECOND, securely attach the L-shaped metal ceiling runner. Center the top flange over, the center line of base. The three horizontal slots allow for minor variations in ceiling height. 'Vi^ . ___, . v.. J ; ' THIRD, place bottom edge of long length ROCK. J lATH plaster base inset grovtedbase section and '';.j v 'V top edge against the .vertical flange of celling x -. runner. Position against V-edge of preceding lath. ; Ceiling Runner and Clip .-.v;.;.'.--.: -This ceiling runner is designed for die ^ ceiling attachment of Long Length j ..., ROCKLATH Plaster base in the construe- . ; tkm of 2' solid ROCKLATH and plaster ? - partitions. The runner is attached to j .. the ceiling and the ROCKLATH fastened . . to'it by use of two hairpin dips for ' ...each piece of ROCKLATH. The three , - horizontal perforations allow for minor' . - variations in ceiling height. ! ' v.Ceiling Runner: 8 ft lengths, 50 pieces Metal Base - V ; The metal base is designed as a floor runner for use with 2* Solid ROCKLATH and Plaster Partitions. The floor dips are nailed to the floor and the base -i: i- snapped In place. The base is then `i - grouted full with sanded plaster raked i At. out In an' Inverted V to receive the Long Length ROCKLATH. Ship. wt. per 1000 ft. double basei 1430 lbs. . (An alternate wood floor runner, milled -:to.-receive the lath, can be used in . * - j -. iy. 'v *. - -j... place of the meta<lV base **. -c if desired.) rrvjt i1 Temporary Bracing Clip This dip is designed to attach the^tem- ^^ porory %' cold rolled channel froce^'T to the ROCKLATH Plaster base. ,THe point of the dip is driven through the^ lath just below the mid-section of par- . .. titions not exceeding 9 feet in height. ';The dip is then turned at right angles to the lath and pulled over the channeL ^ It is easily removed when the channel '"I'V is removed; permits easy and speedy .^ attachment of the temporary bracing. ~ Clips: 500 per carton. ............... .. .. {-' ] - FOURTH, secure top edge of ROCKLATH plaster '^bas# to ceiling runner with hairpin clips. Clips ^ fit easily thru slots in ceiling rvnner. Use two clips per board. FIFTH, %r channel temporary bracet one horl* zontal, for up to 9' height, held with USG brac ing clips; vertical brace, every 6', tied to hori zontal brace and anchored at floor and ceiling. SIXTH, apply scratch coatVo both sides. Follow ing day apply brown coat to sldo opposite bracing. When set, remove bracing and brown braced side. Apply finish to both sides. --:v* - ' . 1 r'-T~-''"7' -*1 : - ,' ics*y~Z;n : -; O 7 -#K /_ c:)Oi^u :_.... j -i fVirL-S^ 5 r iWnon-lodd bearing partition of iath and channel construc- '> -;&? ^fe-tion plastered on both sides to j .;/:5:4dn overall thickness of two inches. ^ \: f* r ^ t. ' <:'r , -. - .* 0|W; Solid Metal Lath and Plaster Partitions are built from readily available stock materials--all items re quired are in normal dealer stock. The construction consists of H" channel studding from floor to ceiling, metal lath, and plaster. USG Metal Base and Ceiling Runner, or other approved methods of floor and ceiling attachment may be used. Electrical equipment and plumbing fixtures, door bucks, etc., are easily installed with the partition. Advantages: Fireproof--composed essentially of gypsum and steel, the partition is incombustible. Has fire resistive rating of 1 hour when plastered with gypsum plaster sanded 1:2, 1:2. Space Saving--only 2" thick. Replaces partitions more than twice as thick. Saves up to 5% of total floor area. Strong--metal lath acts as a steel reinforcement, pro viding exceptional strength. Economical--cost is comparable to conventional wood or metal stud partitions lathed and plastered both sides. Light weight--only 13 to 17 lbs. per partition square foot. Resists Transmission of Sound--37.6 db rating. I [ E C l j u j l j i ...j i . i l r ~ L n . i Ceiling runner, designed for use with metal channel studs, re quires no clips for attachment of metal lath. Runner can be stubnailed to reinforced concrete; is slotted to receive channel ends. Available in 10' lengths. Shipping weight per 1,000 feet, 222 lbs. Erection Recommendations The USG Metal base was designed for use with the 2' Solid USG Metal Lath and Plaster Partitions. The floor clips are nailed to the floor and the base snapped in place. Channel studs attach directly to clips within base. Shipping weight per 1,000 feet double base, 1430 lbs. ] Height of i.;. Partition Thickness of Partition Size of Channel . Stud Permissible Length of Partition Spacing of Studs Lath Recommended Up to 12' . Up to 14' r' Up to 16' Up to 18' 1 - - Up to 20' Up to 24' Up to 30' 2' 2' 2'/*' 12W ' V* vs vs . . -V/i' * 1w No limitation 24 ft. 32 ft. 27 ft. 30 ft. . 36 ft. > : 30 ft. 16' 2.5 lb. Diamond Mesh 16" 3.4 lb. Diamond Mesh 16" 2.75 lb. '/s' Riblath ' 24'* . 3.4 lb. Vs' Riblath j 24" 3.4 lb. Vs' Riblath 24" . 4.0 lb. Vs' Riblath This stud spacing permissible for partition heights not exceeding 16 feet. For greater heights, permanent horizontal stiffener channels must be secured to channel side of partition every 6 feet vertically, or spacings should be reduced 25 per cent. BB012 1033 Fifth--Apply metal lath, starting at ceiling and working toward floor. Sixth--Apply scratch coat to lath side, back-up to channel side. Then brown and finish coats to lath side, finish only to channel side. I i;^-*:-^- -'-v-' _ K:,;j u. `'Umurn. o u O