Document LweZ9103b2V8vgNg84oD5d6Q

GLASS FIBER REINFORCEMENT INTRODUCTION For over half a century, Bestwall gypsum building materials have been accepted as a standard of quality everywhere. This recognition is earned through continued creative research which provides such unique advantages as glass fiber reinforced gypsum plasters and laths. The fiber glass content of Bestwall tibered plasters and laths is an important factor to consider in specifying lath and plaster construction. Literally miles of glass fibers (39'/2 miles per bag of plaster) offer greater resilience and bonding properties that resolve many job difficulties and assure superior results. Armed with this exclusive development, the architect can select with confidence from a variety of lathing systems to meet exacting requirements. INDEX G1AXX FIRFR RFINFORCEMFNT ,,,, . BESTWALL GYPSUM LATH 1 ATHINfi systfms BESTWALL GYPSUM PLASTERS MATHINF APPt ICATION 1 ATH AND Pt ASTFR CONSTRUCTION .. IATH AND PIASTER SPECIFICATIONS.. PRODUCT DATA rnvtPANf DATA Section Page 12 2.__ u 3...... . 5 8 4 sn 5 i/u 6. ... 15 GYPSUM PLASTERS Years of research and field use have demonstrates tnat glass fibered plaster is one of the most versatile piasters ever developed. This advanced improvement m Leered plasters controls the evenness of the scratch coat to produce good bond, thus assuring speedier ana easier application Textile glass filaments of uniform strength and length are dispersed in the mix. These individual filaments *eigh only 1/150 to 1/200 as much as most mamla or sisal fibers yet they are as strong as high strength steel of the same sue Speed--Glass filaments of uniform length and tremendous strength provide speedier and easier application There 'S no balling up to groove the plaster and necessitate bacutrack- mg and smoothing. * Quality Plastering--Provides better keying on metal or pe' forated gypsum lath. A better surface is made for reception of the finish coat. Economy--Spreads freely and provides high coverage 'tfl less droppings. With the glass fibers there is little bmid Jd of fibers and plaster on tools or mixer blades. Machine Application--Where fibered plaster is specified and machine application is used, glass fibered piaster effect* greater construction economies and added design poss'd ' ties. No clogging in the nozzle, no plugging in ,ne hoie FIBER GLASS DATA _ Quality controlled high strength unite"" are well dispersed m the mix Oarf ' - . - ' ?' content measured m miles (Figs zre - .. ; Further information and free consj t 5* Dy wnti ng directly to the Bestwa : o - = - - . cPWf 4 cons'j.: nearest cistrct ctt'ce ; s'nc SGP 0019106 TYPES OF BESTWALL GYPSUM LATH All Bestwall Gypsum Lath is now reinforced with Glass Fibers. In every 1000 feet of 3/8" lath there are 1 2 miles of glass fibers. #t BESTWALL PLAIN LATH Description Consists of a core of gypsum rock sandwiched between two layers of special multi-layer paper covering. The exposed layer is soft and water absorbent, permitting water m the plaster to penetrate the surface. As plaster sets, gypsum crystals form on the paper surface and attach themselves to the main body of the plaster to form a mechanical key. thus assuring maximum bond. Lath paper has water resistant inner plies which prevent the water in the plaster from soak ing through it and thus minimize sagging of the lath and plaster. Available with round edges. Use The standard gypsum plaster base for nail, staple or clip application to wood or steel framing. Size 16" x 48', 3/8' or Vj' thick. (16-1/5* x 48' West Coast only) I ^TM BESTWALL PINHOLATH Description P|am Lath surface-perforated with pinholes no larger than l 16 in diameter, spaced Vi" o.c. This unique feature per rnits rapid suction of water from plaster mix. Provides up to 60% greater compressive strength (psO on finished walls. Dne hour fire resistance over wood frame when plastered to . ` thickness, sanded 1:2. (See Technical Data, p. 9.) Use Specially designed for machine applied plasters. Fast, high, even water absorption speeds plaster application by holding c aster m place during roddmg and darbymg Sue ;6' 48', 16" x 96", y8- thick BESTWALL T-C LATH Description " w-de long length gypsum lath with special high absorbent Permits quick take-up of plaster. Also available pm - ed^ to provide extra suction when plaster is applied over ; -6 by machine. Large sheets decrease number of joints. ' "'! great?- strength and crack resistance to wall and " surfaces. Available with tapered edges Use s-e: an-, designed for reception of veneer or thin coat - rs*ers P'ain or pmholed surfaces are available depending - ` rested suction necessary Sup ' ' " ` -1 X 12 J s' thick 11 Cn order BESTWALL LONG-LENGTH LATH Description Manufactured in special lengths, up to 12', with round or tongue and groove edges. Has same core and paper as Plain Gypsum Lath. Use lesigned primarily for use as a plaster base for thin (2") solid partitions providing fire resistive ratings up to two hours. Can also be used with furring over exterior masonry walls as a plaster base. Size 24' x 96*. `/2' thick. BESTWALL PERFOLATH Description Plain Lath with 3/4~ diameter holes spaced 4" o.c . 48 holes per sheet. Provides a double mechanical bond that increases fire protection. (See Technical Data, p. 9.) Use Applications identical to Plain Lath. A wood stud partition faced with Perfolath and full thickness of plaster specified has one hour fire rating (15 mins, more than Plain Lath) Size 16" x 48", %- thick. BESTWALL INSULATING LATH Description Plain Lath with aluminum foil laminated on the back Re flects 90% of radiant heat and acts as efficient vapor barrier Use Designed primarily for application to exterior wails and top floor ceitmgs Must face a minimum air soace of 4 * to develop reflective insulation value Size *.3 SGP 0019107 I Bestwall Olsen Gypsum Lath Clips permit fast erection of lath over wood or steel framing. Olsen clips attach lath permanently and securely to any framing, require less nailing and no wire-tying. Their strength and flexibility allow slight movement of framing without cracking plaster, compensating tor expansion and con traction stresses. Clips also provide resilience m wall, reducing sound transmission. Simplified, efficient design designates their usage m a variety of wall and ceiling assemblages. TYPICAL LATH SYSTEMS THIN SOLID PARTITION SYSTEM HIGH SOUND TRANSMISSION RESISTANCE Gypsum Lath B) H Clips reinforce external corner wherever gypsum 'ath is not supported by studding and provide positive anchors for partition junctures 0 Clips engage top edge of the long length lath at ceiling runners . it G Clips stabilize temporary bracing bar that supports lath during plastering operation lid C & E Clips attach Hush edges of adjacent lath panels Mr# RESILIENT WALL CONSTRUCTION (Bestwall Gypsum Lath Base) RX Clips attach gypsum lath to wood framing by means of resilient springs m the wire clips and nailed to the framing C Clips (Resilient) are nailed to wood framing members. These clips float the lath free from structure to provide less sound transmission ChJL-fl K Clips (Resilient) are starting clips used at the base of a wall k B-l Clips secure lath edges of internal and external angles formed by walls and ceilings Do not require nailing. ^6 +-t+' SUSPENDED CEILING CONSTRUCTION (Bestw.il Gypsum Lath Base) I Clips (Centerboard) are used in place of field dips to prevent ceiling lath from sagging --*--------------- J. Stef*Tie Clips attach cross runners to mam runners m suspended ceiling systems V. F Clips are field dips that attach gypsum lath to hot or cold rolled channels in cemng construction FS Clips mechanically suspend gypsum lath from hot or cold rolled channels and are used (or starting first score of lath C Clips (Bridge) when used m suspended ceiling systems afe used as t-e'd dips They aUach, straight eoges o' abutting gyosjm lath \ ip-s \\ Vj SGP 0019108 BESTWALL FIREPROOF GYPSUM PLASTER # *4 GENERAL Best-vall Gypsum Company manufactures a complete line of h'ghly efficient gypsum basecoat and high purity finish plasters. These plasters provide a wide latitude of selection to meet all architectural requirements. Each is designed for a specific function Finish coat plasters provide the last plaster operation before decorating. Various finishes are available, depending on the type of texture or decorative effect desired Basecoat plasters form that portion of the plaster construe tion which is applied to masonry or lath bases and which nelp support and develop the properties of the finish coat Basecoat plasters which require an aggregate are furnished with or without fibers Bestwall basecoat plasters, both neat and mill mixed, are available glass fibered. DESCRIPTION The base of all gypsum plasters is gypsum in its calcined form Gypsum can't burn and will not transfer heat sub stantially m excess of 212' F. until all its water of crystalli zation has been driven off in the form of steam. (It takes approximately an hour for 1700; heat to pass through a 1" thickness of solid gypsum). When water is added to gypsum Plaster on the job. the material re-crystallizes (sets) revertng to its original rock-like chemical form. FEATURES Fire Protection--Because of its water of crystallization, gyp. sum with sand, wood fiber, vermiculite or perlite as aggre gate offers superior fire protection in hundreds of construe tions over wood or steel frame, in walls and partitions and in floor and ceiling construction and for beams and coiumns (See fire ratings on p. 10). Durability--When applied in accordance with specifications, Bestwall Plasters provide uniformly strong, stable walls and ceilings. Bestwall sets evenly and uniformly to maximum hardness and strength. Under normal conditions of service, the plaster will last for the life of the building. Economy--Bestwall spreads freely, provides high coverage. The basecoat plasters bond securely to plaster bases, rncluding gypsum lath, metal lath and masonry. The finish plasters, over basecoat plasters, provide hard, dense sur faces with a minimum of working. The finish wall can oe maintained easily with normal car,. 'Plasticized"--Bestwall basecoat plasters, Neat and LiteMix, are manufactured by a special, scientifically controlled process to maintain plasticity and easy workability. This process imparts plasticity and richness to the plaster and produces uniform high quality. Bestwall ' Plasticized'' Plaster makes possible fast and uniform application. Sound Insulation--Plaster adds mass to masonry units or specially designed lathing systems, providing increased sound reduction through these assemblies. Machine Application--Bestwall glass fibered plaster is rec ommended where fibered plaster is specified and machine application is used. Special "machine application" formulas are available. (See p. 8 and the Plastering Specifications for details). BRAND bestwall bestwall bestwall bestwall _ bestwall bestwall bestwall BESTWALL BESTWALL BESTWALL bestwall BESTWALL bestwall PRODUCT NEAT base coat plaster Unfibered, Fibered. and Extra Fibered UTE-MIX BASE COAT PLASTER Unfibered, Fibered (Glass Only) and Masonry Mix WOOD FIBERED PLASTER CONCRETE BOND PLASTER GAUGING PLASTER--White (Satin Spar) or Local MOLDING PLASTER--White (Sunflower) or Local BUILDERS LIME (Autoclaved Finish Lime) SMOOTH FINISHING LIME (Normal Hydrated Finish L me) SPEEDY MASON'S LIME MASON'S LIME (Autoclaved Mason's Lime! 'Normal Hydrated Mason s Limei KEENE'S CEMENT PREPARED SAND FLOAT FINISH PLASTER PREPARED TROWEL FINISH PLASTER ASTM STANDARDS C 28 60 FEDERAL SPEC. SS-P 402 (N) C 28-60 C 28 60 C 28 60 C 28 SO C 59 50 C 206 49 C 6 49 C 207 49 S C 207 49 N C 6 i 50 - -- 4 SS P 402IW) SS P 402 (W) SS P 402 (G) -- SS L 351 (F) SS L 351(F) SS L 351 (M) SS L 351 'Ml SS C 161 - - APPLIED UNDER ASA 42 1 ASA 42 1 ASA 42 1 ASA 42 1 ASA 42 1 -- ASA 42 1 ASA 42 1 ASA 42 1 ASA 42 : ASA 42 ; ~ ;,A i -- SGP 0019109 SECTION 3 GYPSUM PLASTERS BESTWALL BASECOAT PLASTERS The basecoat is the most important element of a plastered wall. It not only rigidities but strengthens the lath base, helping to resist minor structural stresses, it provides the foundation for the finish coat. Tnere are four distinct basecoat plasters, each de signed for a specific function. Selection of the proper basecoat must be made with regard to the lath base to which it is applied and the desired finish coat which it must support. BESTWALL NEAT GYPSUM PLASTERS (Unfibered, Fibered and Extra-Fibered) Description: Basecoat plasters bond securely to any standard plaster base including gypsum lath, metal lath and masonry units. Requires addition of aggregate and water in field. Uses: 1 Fibered Plaster is recommended to provide greater wet adhesion and to minimize droppings with open type lath 2 Unfibered Plaster is used for scratch coat on solid surfaces and for the brown (second) coat on any backing. Features: Durability -- Applied according to specifications, Bestwall Basecoat Plasters provide uniformly strong, stable walls and ceilings. Machine Application--Special plasters, both fibered and unfibered. are available for use in machine application. BESTWALL LITE-MIX PLASTER Description: A base coat plaster that is 50% lighter than gypsumand sand plaster. Available either Fibered. Unfibered or Masonry Mix, Fibered Lite-Mix contains glass fibers to provide added strength and uniform thick ness with less droppings Requires addition of water only in field. Masonry Mix available for application on masonry oases Uses: May be used for machine or trowel application to produce a superior basecoat. Features: Fire-Resistant--Perlite aggregate provides higher fire resistance than sanded plasters. Mixes smoothly--has no tendency to block the nozzle of the plaster gun. High Insulation Value--Lite-Mix provides greater m sulation than sanded gypsum plaster, BESTWALL WOOD FIBERED GYPSUM PLASTER Description: Non-staining shredded wood fiber additive provides good working properties when used without aggregate Uses: Intended for use without aggregate as scratcn and brown coat. May be mixed with one part of sand for scratch coat over high suction masonry. Features: Economy--Can be applied quickly and easily Strength--Bestwall Wood Fibered Gypsum Plaster has approximately 3 times greater compressive and tensile strength than sanded plaster: up to 2V2 times greater resistance to lateral impact and 50% greater surface hardness. Fire-Resistant--Wood fibered Plaster provides excel lent fire rating up to 50% higher than sanded plaster BESTWALL CONCRETE BOND GYPSUM PLASTER Description: A basecoat plaster designed to bond permanently with monolithic concrete to preserve a hard, durable surface. Requires addition of water only m field Uses: Specially formulated to compensate for 2 problems 1 where surface is too dense for ordinary plaster to form a mechanical key, and 2. where thermal expansion of concrete is lower man that of ordinary'plasters Features: Bonding Strength--Concrete Bond adheres we-i properly prepared concrete surfaces, columns => ibeams and on smooth cement block walls Low Cost--An economical basecoat plasm-' vide for application direct to concrete s--r J-e3 SGP 0019110 ^0 ^^ |T ' l BESTWALL FINISHING PLASTERS GAUGING PLASTERS Description: Specially ground high purity gypsum finishing plas ters designed to be blended with lime putty. They provide the base for final wall or ceiling decoration. Usually applied over a gypsum plaster basecoat and to a thickness of Vu" to Vi". Available in "Slow Set" and "Quick Set". Features: White Coat Finish--Gauging sets to provide a hard. smooth white coat finish, over gypsum basecoat. Plasticity--Lime is used to furnish whiteness, plas ticity and bulk. 1 Satin Spar Gauging Plasters are very white. 2 Bestwall Gauging Plasters made of local rock are recommended for use where pure white finish is not necessary. They furnish the same high quality sur face as Satin Spar. ' MOLDING PLASTERS Description: Very white plasters made from selected gypsum rock of exceptionally high purity. Specially ground and processed to provide hard strong molds and casts. Excellent for ,un work and ornamental features. 1 Sunflower Molding Plasters are very white. 2 Bestwall Molding Plasters made of local rock are recommended for use where pure white work is not necessary. They furnish the same high quality sur face as Sunflower. finishing limes Bestwall Smooth Finishing Lime (Normal Hydrated) Description: Hydrated Finishing Lime soaked to putty consistency (approximately 16 hours) blended in proper proport'n with gypsum gauging plaster Troweled to a smooth, hard finish over properly prepared gypsum ^asecoat. Must be blended with gypsum gauging "'aster of proper proportion which provides initial se! ar|d strength, avoiding shrinkage cracks. Features: Teness. Bulk and Plasticity are provided by me " "ast Easy Application with full flexibility and ;:'^y Bestwall Builder's Lime (Autoclaved) Description: A pressure hydrated (less than 8% unhydrated oxides) special finishing lime. May be mixed by adding lime to water in mechanical mixer. Features: Requires no soaking to produce smooth, uniform, white, highly plastic putty. Normal plasticity achieved immediately. MASON'S LIME Bestwall Mason's Lime (Normal Hydrated) and Bestwali Speedy Lime (Autoclaved) available. BESTWALL KEENE'S CEMENT Description: A high strength, "dead burnt" white gypsum plaster. Provides stronger, harder surface when substituted for gauging plaster in a lime-gauging mix. The lower the lime content, the harder the finish. Available Regular and Fast set. Features: Resistance to Abrasion--provides high resistance to abrasion making it suitable for use in bathrooms, kitchens, hospitals, etc. Low Water Absorption--because of high density, has low water absorption. Various Finishes--Keene's Cement when mixed with varying proportions of lime putty provides "standard hard" "medium hard" and "extra hard" finishes. BESTWALL PREPARED TROWEL FINISH Description: A pre-mixed gypsum finish coat plastei requiring addition of water only Made from high grade gypsum rock of white or local gray. Features: Strength--produces very hard surfaces approxi mately twice the strength of ordinary li^e gauging finishes. Easy Decoration--can be decorated as see-' as drv SGP 0019111 SECTION 3 MACHINE APPLICATION BESTWALL MACHINE APPLICATION PRODUCTS BESTWALL PINHOLATH Bestwall Pinholath provides an excellent base for a variety of machine applied plasters on walls, combining coverage ease with one-hour fire rating. Pinholes, scientifically de signed to precise depth, width and space permit the lath to uniformly absorb up to 12 times more water from the plaster mix than regular lath. The mix quickly achieves proper consistency for various finish treatments. Special papers have high tensile strength to prevent plaster crack ing. (See Technical Data, p. 9). MACHINE APPLICATION Bestwall manufactures a complete line of products speci fically designed for machine application. Specially formu lated plasters are designed to pump at low hose pressure with less water demand. These advantages assure steady, uniform flow from the nozzle without aggregate separation or plug ups and strong, rigid plastering with minimum waste. For scratch coat over metal lath, Bestwall Glass Fibered Plaster forms adequate keys with minimum blow through. To accommodate machine applied plasters, Bestwall also has developed special pinhole-perforated gypsum lath-- Pinholath and T-C Lath (see Product Descriptions, p. 3). The primary value of pmholing, a Bestwall exclusive, is to permit greater water absorption in machine application resulting in greater densification. ADVANTAGES Speedy Application--Machine plastering speeds construction time and lowers production costs. It eliminates mixing set-up at intermediate floors and dependence upon general con tractors for hoisting facilities. Economy--Machine application, using gypsum lath and plasters developed for this purpose by Bestwall Gypsum Company, offers maximum coverage per man with minimum waste. Durability--When mixed and applied according to specifica tions. resultant plastering develops full strength and hard ness resulting in strong, durable walls and ceilings. Design Flexibility--Machine application lends itself to the flexibility of design for which gypsum plaster is noted, thus placing no limitation on use of this method of application. BESTWALL T-C LATH Designed specifically for thin coat plaster application, T C Lath is available Plain or Ptnholed. Where the plaster is put on over x," thick by machine, the pmholed product is re quired for high water suction so that the mix can be darbied and troweled. A 2-m. wide fiberglass mesh is used for |omt strengthening between sheets and in vertical and ceiling corners. Thin coat plasters shall be applied in accordance with manufacturers' specifications. BESTWALL NEAT GYPSUM PLASTERS Unfibered plaster may be used for the scratch (first) coat on gypsum lath or masonry (solid surfaces) and for the brown (second) coat on any backing. Fibered plaster con tains a carefully measured amount of glass fiber to provide greater wet cohesion and minimize droppings behind open type lath. Fibered plaster is recommended for the scratch coat on perforated gypsum or metal lath and may be used for the brown coat on any backing. Extra-fibered plaster contains a greater proportion of glass fiber and is preferred in some areas for the scratch coat on metal lath. BESTWALL LITE MIX un*ibre Fibrd igiu wiri Mixes smoothly, spreads easily and has no tendency to block the nozzle of the plaster gun. Lite-Mix produces a superior basecoat. It is also available in a Masonry Mu for application on masonry bases. Water only is added on the job. BESTWALL TWIN PLASTER #ii.i. iw ci dn A specially controlled process gives Twin Plaster easy work ability for fast, uniform coverage. In machine application, it prevents clogging in the nozzle and plugging in the nose^ It is used with equal facility for hand application Made chighest purity gypsum. Twin Plaster is available glass fibere or unfibered to meet every job condition. 8 SGP 0019112 Bestwall Gypsum Plasters can be applied over gypsum or metal plaster bases on wood or steel framing. By varv ng the type of lath and the plaster mix and thickness, a full range of fire ratings may be obtained, from 4o minutes to four hours. TECHNICAL DATA CONSTRUCTION TYPE BASE HKtmam P atrip*-- TW^hp 2" i 4' Wood Studs 16 on Center Steel frame 5H' 5H" 5H" 5H* 5H" 5H" 5*" 5*" 5 H'' 5V 2m r 2" 2" 2" I'/t" 2vr 2 Vs" 4A" to 5*" 4`/4" to SH" 5V 4* Bestwall Pnnotath H " Bestwall Plain Gypsum Lath Plain Gypsum Lath y%" Plam Gypsum Lath H" Perforated Gypsum Mataf Lath Metal Lath Matal Lath Matal Lath Vi" Long Length Gypsum Lath `/j" Long Length Gypsum Lath Vi" Long Length Gypsum Lath Vt" Long Length Gypsum Lath Mate! Lath Metal Lath Matal Lath Matal Lath Plain Gypsum Lath H" Perforated Gypsum Lath Matil Lath V%m Perforated Gypsum Lath 1 ... PLASTER MIX 1 part of Gypsum Plaster r 100 pounds) to cu ft aggregate THICKNESS Fact of Lath to Face of Finished Surface a Mm tcfiMR Md Brmm> (1 mt ScrwkN Pi alls Up) Gypsum Sand 1 2 Gypsum Sand 1.2 Gypsum-Sand 1.2. 1 2 Gypsum Wood Fiber Gypsum-Sand 1 2. 12 Gypsum-Perlite 12 12 Gypsum-Send 1 2. 1 3 Gypsum Wood Fiber Gypsum-Perlite 12 12 Gypsum-Vermicuhte 1 2, 1 2 Gypsum Sand 1.1. 1.2 Gypsum Perlita 1 2 Gypsum Perlita 1.2. 1 2 Gypsum Varmiculita 1.2 12 Gypsum-Sand 1.2. 1 2 Gypsum-Perlite 12 Gyosum-Perlita 1:2.1 2 Gypsum-Vermculite 1 2. 1 2 Gypsum-Perlite 1:2 Gypsum-Sand 1.2. 1 2 Gypsum-Sand 1.2. 1.3 Gypsum-Perlite 1 2. 1 2 V," vr */r Ve" Vt" V." v*Y*~ yr vr r yr l'/4" \ym Vi" v v yr FIRE RATING -------------- 1 WEIGHT LBS. PER SQ. FT. NRC (AVERAGE) DECIBELS 1 Hour 1 Hour 45 Mmutas l Hour l Hour 1 Vi Hours 1 Hour 2 Hours 1 Hour 1 Hour 1 Hour l Vi Hours 2 Hours 2 Hours l Hour 1 Hour 2 Hours 2 Hours 1 Hour 1 Hour 1 Hour 2 Hours 15 15 14 7 --1 -- 18 1 -- -- 35 lo 45 -- -- 1-- 16 5 _____ 110 9 74 -- -- 16 to 21 15 38 -- ' 33 -- -- 30 to 41 Wood Joists end Floor Steel Joists - Furring Channels 16" oc 16" oc 16" oc 16" oe 12" oc 16" oc 12" oc H' Bestwall Pmhoialh V%m Bestwall Pmhoialh H' Bestwall Plam Gypsum Ljth H" Perforated Gypsum Lath *H' Perforated Gypsum Lath H " Perforated Gypsum Lath Metal Lath Metal Lath H" Perforated Gypsum Lath (Clips) Perforated Gypsum Lath (Clips) V|" Perforated Gypsum Lath (Clips) V' Perforated Gypsum Lath (Clips) H" Porforated Gypsum Lath (Clips) H' Perforated Gypsum Lath Plus l' Math H" (Clips) Plus 1" Mesh Metal Lath Metal Lath Metal Lath StHl Floors 2 to 2,A*` Concrete Floor with Suspended Ceilings 12" oc H" Perforated Gypsum Lath Pius Clips and Wire Reinforcing Metal Lath Metal Lath Gypsum-Peiiite 1 2 Gypsum-Sand 1 2 Gypsum-Sand t 2 Gypsum-Sand 1 2 Gypsum-Sand 1 2 Gypsum-Partita 1 2 Gypsum-Se^d 1 2. 1 3 Gypsum-Pi .ie 1 2. 1 2 Gypsum Pari it* 12 Gypsum Varmiculita 1 2 Gypsum Pe'lite 1.2. 12 Gypsum-Perlite 1.2 Gypsum-Peritte 12 12 Gypsum-Perlite 1 2 Gypsum-Perlite 1 2. 1 3 Gypsum-Sand 12.13 Gypsum Partite 12 12 Gypsum Verrmcuhtt ) 2. J 2 Gypsum-Perlite 1 2 Gypsum Perlita 1 2. 1 3 Gypsum Wood Fiber VT VT vr H' Vi" H" VT V H" r Vir Me' Vu" 1" Vi' lMi" r H" on Ceilings (ft" on Baam) r ft" 1 Hour 1 Hour 1 Hour 45 Minutes 1 Hour 1 Hour 1 Hour l Vj Hours l Hour 1 Hour 1 Vi Hours -- 3 Hours 3 Hours 4 Hours 2 Hours 3 Hours 4 Hours 3 Hours 4 Hours 4 Hours 12 5 17 5 40 32 to 34 ---- -- -- -- -- -- -- -- -- ______ -- ---- -- ---- -----. -- -- -- -- ______ -- ~~ ' Columns :St*el) V," Perforated Gypsum Lath V Perforated Gypsum Lath K" Perforated Gypsum Lath i V Perforated Gypsum Lath 1 2" Layers '/j ' Pla-n Gypsum Lath 1 Metal Lath Metal Lath i 1 Gypsum-Sand 1 2", ; Gypsum-Sand 1 2 1 3 Gypsum Perlita 1 2 V, 1 Gypsum Perlite 1 2. 1 3 - Gypsum Perlite 1 2. 1 3 : Gypsum Sand 1 2 1 3 j Gypsum Perlite 12 13 1 Vi" IV 1" IV IV tv I 1 Hour T~T" j 2 Hours 2 Hours 3 Hours 4 Hours l Hour : 4 Hours J_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ f -------- ! --------- -- -- -- -- -- -- L. ~..._ XOTt: Thu tabls is i summit only, biltd on toils it Undonofitors Loborotones Nationil Bofeou of Stindords ond/or Ohio Stoto Umyorsity, soonsorod by tho Gypsum Asiocia t'On Metal Lath Association Pariita institute. Vermicuitte institute or others the I re rat'n| weight and sound characteristics are based on a combination ol specific Ititrlt is published by the Associations and also by the National 8ueeu of Standards n various 8MS reports, by rfattone) Board ot fire Underwriters in their L'st of Piling* and others Mor* compete listings and details are available from many sources1 Plus Mem Mesh strip reinforcing over iosts SGP 0019113 SECTION 4 LATH AND PLASTER CONSTRUCTION GYPSUM LATH AND PLASTER FIREPROOFING THIN SOLID PARTITIONS A 2" Solid Partition is a non-load bearing (non supporting) unit composed of Bestwall Long-Length Gypsum lath threecoated out on both sides to a total 2' thickness. No stud ding is required. The lath is inserted into floor and ceiling runners and is temporarily braced during the plastering operation. 2' Solid Partitions make economical floor area dividers and render more usable space than hollow or tile partitions. Bestwall Olsen Gypsum Lath Clips provide easier, faster erection and eliminate wire-tying. Tested under A.S.T.M. Standards. 2" Solid Partitions of lath and sanded plaster qualify for 1 hour fire rating. For higher fire ratings, consult Technical Data--Lath and Plaster Construction on the pre vious page. HOLLOW STEEL STUD PARTITIONS Hollow Steel Stud Partitions consist of gypsum lath and plaster over steel studding. These partitions may be load bearing or non-load bearing depending upon studding used. Studs are available in widths from 21/2' to 6". Bestwau Gyp sum Lath is secured to the studs by use of transverse clips or other special clips and techniques. These partitions are particularly adaptable where pipes and utilites are to be concealed. Weight of Hollow Steel Stud Partitions is determined in pounds per square foot and will range from 10 lbs to 15 lbs depending upon aggregate used and thickness. A 1 hour fire rating is obtained when Bestwall Perfolath and a l/2' plaster is used Mix is 1 part plaster to 2 parts lightweight aggregate or sand. SGP 0019114 I GYPSUM LATH AND PLASTER FIREPROOFING BEAM AND COLUMN FIREPROOFING Fireproofing of the beams and columns is accomplished by abutting y8` Bestwall Perfolath around the perimeter of the beam or column and plastering to thickness required for desired fire resistance rating The Perfolath is held by tying douoie strands of the wire around the lath and spaced 16" o c. Cornerbeads applied by staples or tie wire provide ground for proper thickness as well as straight true corners Sanded plaster is used for fire ratings up to three hours Lightweight aggregates provide fire ratings up to 4 hours A 4 hour column rating requires two layers of : V thick gypsum lath. tr i f* CEILING FIREPROOFING Lath and plaster citings when directly attached to or sus pended from structural members provide fire protection that eliminates concrete or tile encasment of steel framings. Dead weight loads are reduced by as much as 50% This m turn reduces structural steel requirement to a minimum of 15%. Thicknesses of lath and plaster are based on required fire ratmg$. Sand aggregate provides up to 2 hour fire rating while up to 4 hour fire ratings may be obtained with the use of vermiculite or perlite aggregates. % furring channels are directly attached to the bottom of the structural members or tied to main runners in sus pended systems. Bestwall 3/a` Perfolath is attached to furnng with transverse clips and plastered out to required thickness 'or three and four hour fire resistive ratings. 12 gaug ,s !a,d diagonally across the plastering side of the lai ,iec to each clip for additional support Plaster mix sr 1 Part gypsum to 2 parts aggregate for scratch coat a for brown coat For double up work which is permitl solld lath nailed or stapled to supports 16' on maximum (no perforated lath, nor clip attached lath -'''cportion may be changed to 1 2% for entire Das SGP 0019115 SECTfOr5 SPECIFICATIONS SPECIFICATIONS FOR 1. MATERIALS A. Gypsum Lath shall conform to the current Standard Specifications for Gypsum Lath, ASTM Designation: C37 Gypsum lath shall be one of the following types: Plain, Perforated or Insulating. All gypsum lath shall be as manufactured by Bestwall Gyp sum Company and shall conform to the following dimen sional requirements: Thickness 3.8' or i/?- Width 16" (a) or 24' Length 48" (b) (a) 16'/i` wide lath is available in Pacific Coast Markets. (b) Long-length lath vi" thick is available for special systems such as solid gypsum lath and plaster partitions and furred walls. B. Gypsum Lath Clips shall be Bestwall Olsen Gypsum Lath furnished by Bestwall Gypsum Company. C. Other Metal Accessories such as corner beads, base screeds, concealed picture molds, etc., shall be not I ghter than No. 26 U.S. gage steel, zinc coated, with perforated or expanded flanges or clips shaped so as to permit complete embedment in the plaster. D. Channels shall be hot-rolled or cold-rolled steel, free of rust, with required weight per thousand lineal feet. 2. APPLICATION OF GYPSUM LATH A. Except where noted below Bestwall Gypsum Lath shall be securely nailed to wood supports spaced not to exceed 16' on center (24' on center for l/2' lath) with 13 gage, l'/a" long (1*4" long for t/2" lath). 19/64' flat-head, blued nails approximately 5' o.c. The nails shall be driven with the underside of the head flush with face of the lath and shall not be closer than 3/B' from edges or ends. There shall be not less than four nails per lath per support with 16" wide lath. Where 24" wide lath is applied, there shall be at least 5 nails per lath per support, approximately 5* on center. B. Where gypsum lath is used for certain fire-resistive rated construction, five 13 gage, l%" long, 3/8" flat-head, blued nails per lath per support for 16' wide lath may be required. INTERIOR LATHING C. Ya~ Bestwall Gypsum Lath may be applied with staples to wood nailing members by means of a pneumatic tool Staples shall be not less than 16 gage flattened galvanized wire. '/u~ flat crown, divergent point, not less than %' long. Staples shall be driven with the crown parallel to the long dimension of the nailing member, using not less than 4 staples per 16" width of lath per nailing member and not more than 5" o.c., in such a manner that the crown bears tightly against "he lath but does not cut into the face paper. Ine legs ci the staples shall not be closer than %' from the ends and edges of the lath. D. Bestwall Gypsum Lath shall be applied with its face side out and with the long dimension at right angles to the framing members. End joints shall be made to fall on dif ferent supports in alternate courses,or the lath shall be applied so that end joints are madecontinuously on one support. In the latter case, the continuous joints shall be covered with 3' wide strips of metal lath and the long or edge joints shall be offset or staggered. In all cases, the lath shall be butted together. E. Corner bead shall be used qver lath to protect all exter nal vertical corners and to establish grounds, and snail be attached securely in such a manner as to assure proper alignment during application of plaster. F. Comerite shall be provided at all interior angles and shall be nailed lightly or stapled to the lath, not to the framing members. G. Where Bestwall Olsen Gypsum Lath Clips are used, the erection of lath shall be in accordance with the directions and details shown in the various constructions. 3. METAL LATH AND METAL FURRING Shall be in accordance with ASA Standard Specifications for Interior Lathing and Furring, No. A42.4 (latest current ver sion). 4. WORKMANSHIP All metal construction and lathing shall be erect so that finished plaster surfaces may be true to line, and be level, plumb, square, curved or as otherwise required, without excessive thickness of plaster. SPECIFICATIONS FOR GYPSUM PLASTERING The following specifications covering machine mixed neat basecoat plasters with a lime putty white coat finish are applicable to a majority of plaster work. As indicated in Section 2A (Materials) Bestwall offers a full line of plaster materials which work well, applied under the ASA 42 Standard Specifications for Interior Plastering. For more information write the Bestwall Gypsum Co. 1. GENERAL PROVISIONS The work includes all labor, materials, services, equipment, and scaffolding required to complete the plastering of the project in accordance with the drawings and specifications. (See interior lathing specifications.) 2. MATERIALS A. Plastering Materials The plaster materials shall be selected from the following categories and brands as manufactured by Bestwall Gypsum Company and conforming to the current ASTM specifications as noted: BESTWALL Gypsum Plaster C28 BESTWALL Lite-Mix C28 BESTWALL Wood Fibered Plaster' C28 BESTWALL Concrete Bond Plaster C28 BESTWALL Prepared Trowel Finish -- BESTWALL Prepared Sand Float Finish -- BESTWALL Satin Spar White Gauging Plaster C28 BESTWALL Common Gauging Plaster C28 BESTWALL Sunflower Molding and Casting Plaster C59 BESTWALL Keene's Cement C61 BESTWALL Builder's Lime (Autoclaved Finish) C206 Type S BESTWALL Smooth Finishing Lime (Normal Hyorated) C6 Type N B. Aggregates (for use with gypsum plaster) Sand, Perlite or Vermiculite shall conform to ASTM Specification C35 5/ > for use in basecoat plaster. For plastering, the aggregate weight per cu. ft. shall be for sand, 100 lbs; for Perlite ana Vermiculite, 7 to 11 lbs. Fine Sand having rounded particles uniform m size ('re quently called "quicksand"), fine Perlite or fine Vermiculite shall not be used. C. Water shall be clean, fresh, potable and free from sue amounts of mineral and organic substances as would arfec the set of the plaster. D. Materials, Delivery of, and Protection All manufactured materials shall be delivered in the original packages ~cr^ tamers, or bundles bearing the name of the manu'ac'ure of the brand Plaster and all cementious materials shall be ept c"r u ready to be used: they shall be kept off the gr0lJ cover, and away from sweating walls and other - faces Metal goods snail be protected agamst "-s 4 12 SGP 0019116 SECTION 5 SPECIFICATIONS If glazed sash are not in place and the building is subiected to hot. dry winds or temperature differentials from day to night of 20"F. or more, openings shall be screened with ch"esecloth or similar materials. B. Masonry Surfaces on which suction must be reduced shall be properly wet down immediately before the plaster is applied. Because bituminous compounds do not provide ideal bases for plaster, the application of plaster to masonry or concrete which has been coated with such compounds is forbidden. C. Monolithic Concrete Surfaces shall be cleaned of all dust, loose particles, and other foreign matter. Laitance and efflorescence shall be removed by washing first with 10% solution of commercial hydrochloric acid (muriatic acid) and water and then with clean water to remove all traces of acid. Grease and oil shall be completely removed (Note 9b). Concrete surfaces shall have sufficient roughness to provide proper bond. If necessary, the surface shall be evenly wet ted, but not saturated, to provide proper suction. If surfaces are not rough, they shall be hacked or bush-hammered or a dashcoat of Portland Cement grout, composed of 1 part of cement to iy2 parts of fine sand mixed to a mush con sistency. shall be applied. The Portland-Cement grout shall be forcibly dashed on the concrete surface, using a stiff fiber brush, with a whipping motion. This coat shall be kept damp for at least two days immediately following its application and then allowed to dry. Before application of plaster, the surface shall be evenly dampened if necessary to provide proper suction. D. Metal Grounds and other accessories, such as corner beads, screeds, picture molds, etc., shall be carefully examined to see that they are straight, curved, plumb, level, square, or true to the acquired angles, as the case may require, before the plaster is applied. E. Surfaces shall be carefully examined before the plaster is applied thereto, and the proper authorities notified of any and all unsatisfactory conditions. Application of the plaster then shall not proceed until such unsatisfactory con ditions have been satisfactorily remedied or adiusted. 9. APPLICATIONS OF BASE COAT A. Two-Coat Work--Base (first) coat shall be applied with sufficient material and pressure to form good bond on gypsum lath or masonry as the case may be. and to cover well. Then, before this scratch coat has set, and without raking its surface, material of the same proportions shall be doubled back to bring the plaster out to grounds struck to a true surface wtih rod and darby, without application of water and cross raked or scratched to provide a mechanical key for reception of the finish (second) coat. Slow-setting plaster shall be accelerated to provide a set (mixed mate rial) of less than 4 hrs. B. Three-Coat Work--Scratch (first) coat shall be applied with sufficient material and pressure to form good full keys on metal lath, wire lath, or wire fabric, or good bond on gypsum lath or masonry, as the case may be, and to cover well and then be scratched to a rough surface Slow setting plaster shall be accelerated to provide a set (mixed mate rial) of iess than 4 hrs Brown (2nd) coat shall be applied after the scratch (1st) coat "as set ` rr" 3nd oard brought out to grounds. straightened to a true surface with rod and darby, without application of water and cross raked or scratched to provide a mechanical key for reception of the finish (3rd) coat. To insure full plaster thickness, plaster screeds should be ap plied to scratch coat prior to application of brown coat. C. Plastering on Monolithic Concrete-Surfaces of walls and columns shall have a scratch coat of bond plaster, followed by a brown coat of gypsum plaster (in the proportions of 100 lb. of Bestwall Gypsum Plaster to not more than 3 cu ft. of sand or perlite) troweled into the scratch coat before it has set. The brown coat shall be brought out to grounds using a double-back application if required, straightened to a true surface with rod and darby, with application of water and cross raked or scratched to provide a mechanical key for reception of the finish coat. Surfaces of ceilings shall have a coat of bond piaster, scratched in thoroughly, doubled back, and filled to a true even surface and left rough (maximum thickness %'), to receive the finish coat. D. 2" Solid Gypsum Lath and Placer Partitions shall be scratched in on both sides with y8" fast setting plaster (maximum 3 hrs.) practically simultaneously. The side away from the temporary bracing shall be browned after both scratch coats have set and partially dried. After this brown coat has set firmly, remove the braces and brown the other side leaving y,' for finish coat to bring wall to full 2' thickness. 10. APPLICATION OF FINISHES The finish coat shall be applied to a partially dry base coat or to a thoroughly dry base coat which has been evenly wetted by brushing or spraying. The use of excessive water shall be avoided in the application of all types of finish coat plastering. NOTE: Fine sand or perlite shall be used in smooth trowel finishes. Over gypsum or metal lath bases where light weight aggregate is used and the aggregate content in the basecoat exceeds 2 cu. ft. per 100 lbs. of gypsum, a sand float, acoustical or other finish shall be used. Smooth Trowel Fin ishes shall not be used in this place. A. Trowel Finishes--Trowel Finishes (smooth) shall be ap plied over the base coat scratched in thoroughly, laid on well, doubled back and filled out to a true, even surface. The gen eral thickness shall be y,' to Vs'. The finish shall be allowed to draw a few minutes and then it shall be well-trowelled with water to a smooth finish, free from cat faces and other blemishes or irregularities. B. Float Finishes--Float finishes shall be applied over the base coat, scratched in thoroughly, laid on with a trowel to an even surface, and then floated (with wood, carpet cork, rubber or other type floats, depending on tne texture desired) to a true, even surface free from slick spots or other blemishes. C. Special Plasters--Special Plasters shall be applied n accordance with the directions of the Manufacturer SGP OOI9117 *> * fl 3. BASE COAT PROPORTION Bestwall Gypsum Plastsr shall be mixed wtih sand, perlite or vermiculite in the proportion of 100 lbs. of plaster to rr` more than: RECOMMENDED AGGREGATE PROPORTIONS WITH RESTWAU RASE COAT PLASTER Not Sn S2 shovafs of loot* damp sand ara aqmvafant to ( cu ft of sand piMttf Bast , i j Numb,, I Coats | ; Max cu ft of ag|ra|ata to bo muad i | with 100 lbs of not gypsum plastar ' ' UNDER SMOOTH TROWEL FINISHES j ' Sand (1) | Parlita or Varmiculita 1 , ; PLASTER THICKNESS [ Gypsum lath Metal ; Lath 1 Ovar Masonry | latcaot mono| httiic concratoV) Two coal work Bast Coat Thrae coat work. Scratch Coat Brown Coat Tftrca coat work Scratch Coat Brown Coat Two coat work Basa Coat Thraa coat work. Scratch Coat Brown Coat | 1 ; i j ! 1 | ,i 1! ? * ? , J ,3' , ,3 i i ,12 ? ^ n 3 3 3 2 3 2$ 3 3 3 3 'T' Undar sand float or acoustical plasters mother finishes than smooth trowal) 2 Vj cu ft of oarltta or varmiculita may be used T) Under sand float or acoustical blasters 'other finishes than smooth trowel) per Mi or vermiculite up to 3 cu ft may be used X Varmiculita aifrafata shall m ba used over metal <elh where smooth trowel Mush is usod Over hi|h suction base, sand may ba 4 cu ft ` Bondinf aienti for application to monolithic concreta as a base for reception of piaster may ba used at the discretion of the specifier Such bonding agents snali be apoiied <n accordance with the specifications of the manufacturer A certificate of satisfactory 10b performance may bo requested from the bonding agent manu facturer 4. MECHANICAL MIXING Material that has partially set shall not be retempered or used. Frozen, caked or lumpy material shall not be used. The mixer shall be cleaned of all set or hardened material before materials for a new batch are loaded. Each batch shall be mixed separately. Materials shall be added while mixer is in continuous operation. Put m the approximate amount of water: if sand is used add approximately half the amount of aggregate (if perlite or vermiculite is used add all the aggregate): add all the plaster: add the remainder of the sand aggregate: mix to the proper consistency, adding water if necessary; and dump the entire batch and use. Note: The mixer should be flushed with water when used intermittently. 5. LIME PUTTY A. Bestwall Smooth Finish Lime shall be box soaked or machine mixed with 6 to 6>/2 gal. of water for each 50 lb. bag and allowed to soak overnight. B. Bestwall Builders Lime shall be mixed with approxi mately 6`4 gal. of water per 50 lb. bag. It may be machine mixed and used immediately or soaked and used the next day. 6. FINISH COAT PROPORTIONS A. Smooth Trowel Finish NOTE. For smooth trowel finish l/2 to 1 cu ft. of fine sand y* peMite shall be added for each 100 lbs of gypsum (Gauging or Keene's Cement) 1- Gypsum Lime Putty Trowel Finish shall be mixed m the ^portions of 1 part of gauging plaster (calcined gypsum) c not more than 3 parts of hme putty by volume 2. Keene's Cement Lime Putty Finish may be standard hard, medium hard, or extra hard finish. When mixed mechani cally the water shall be put in the mixer first: then the lime (dry or putty); the sand, if used; and finally the Keene's Cement. Standard Hard Finish shall be mixed in the proportions of 100 lbs. of Keene's Cement to not more than 100 lbs. of dry hydrated lime. B. Sand Float Finish 1. Gypsum Sand Float Finish shall be mixed in the ratio of 100 lbs. of gypsum plaster (unfibered) to not more than 200 lbs. of sand. 2. Keene's Cement Lime Putty Sand Float Finish shall be mixed in the range of 2'4 to 3 parts of sand to 1 part of a mixture of Lime and Keene's Cement by weight with 34 to iy2 parts of Lime to 1 part of Keene's Cement by weight. The specified range is equivalent to the following: from 75 lbs. Lime to 100 lbs. Keene's Cement to 400 to 525 lbs. sand to 150 lbs. lime to 100 lbs. Keene's to 560 to 700 lbs. sand. 7. THICKNESS OF BASECOAT PLASTER Plaster shall be of the following thicknesses measured from the face of plaster base to finished plaster surfaces. Wood or metal grounds or plaster screeds shall be installed to assure such thicknesses: i Gypsum Lath J Metal Lath*, Wire Lath and 'Wire Fabric Masonry and Concrete Walls Monolithic Concrete Ceilings THICKNESS OF PLASTER INCLUDING FINISH COAT. INCH >/2 min. 5/8 mm. s/8 min. >/8 min. 3/a max. A. Plaster thickness when measured from the back plane of metal lath, exclusive of ribs, shall be 34" minimum. B. If monolithic concrete ceiling surfaces require more than 3/a" of plaster to produce required lines or surfaces, metal lath or wire lath bonding for the plaster shall be attached to the concrete before application of plaster. Where the concrete ceiling surfaces are such as to require the appli cation of an excessive thickness of plaster to produce required lines or surfaces, lath shall be applied over furring secured to the concrete. Wood Grounds shall be furnished and installed by others. Metal Grounds shall be furnished and installed by the (plastering) (lathing) contractor. Plaster Screeds shall be installed by the plastering con tractor. 8. PREPARATIONS FOR PLASTERING A. Temperature and Ventilation: When the prevailing outdoor temperature at the building site is less than 55-F a uniform temperature of not less than 553F. shall be continuously maintained in the building for a period of not less than one week prior to the application of plaster, while the plastering is being done, and after the plaster is dry. The heat shall be well distributed in all areas, and deflection or protective screens shall be used to prevent concentrated or uneven heat on plaster areas near the heat source Products of combustion shall be vented to the outside. Ventilation shall be provided to properly dry the plaster during and subsequent to its application. In glazed b'nld mgs this shall be accomplished by keeping windows approximately 2' top and bottom (or side pivoted w* approximately 4") to provide air circulation and by temporary circulators or the air conditioning sy enclosed areas or buildings lacking openings fc ventilation SGP 0019118 BESTWALL PRODUCT DATA SECTION 6 9 1 t pu. n- ?d ed . the /vel >^t. jre . or r rf % J mw J use COWMWt (quart yurt* por imi) n&* BiMCMt Plasters NEAT Unfibered Fibered (glass fiber or sisal fiber) Extre-Fibered (glass fiber or sisal fiber) BESTWALL BESTWALL BESTWALL Scratch coat on all backings aicapt metal lath and monolithic concrata Brown coat on all backings (sanded 2 1) Gypsum Lath 190-220 Metal Lath- 100-130 Gypsum Tile: 210-240 Clay Tile: 165 200 Vi' V `r ? Scratch and brown coat on all backings aicapt monolithic convtxt. same as above .. . Scratch coat on matal lath but mar ho usod ovar all basot eiceot monolithic concrete same as above same as above same as above MILL-MIXED Fibered, Unfibered Masonry Mix BESTWALL Lite-Mis (Available in 80 lb bags only) Whara lightnass is dasirad. for fastar. oasiar application. Gypsum Lath: 135-150 Metal Lath: 75-90 Gypsum Tile: 135-150 Clay Tile: 110-125 vr V,' v,- V,' Wood Fibered Concrete Bond BESTWALL (Available in 100, 50 ar.d 10 lb bags) -- Without sand-scratch coat and brown coat on all backings axcapt masonry With sand-scratch coat On masonry and brown coat on all backings BESTWALL Doubla back coat on monolithic conerata. or as scratch coat only (without sand) Gypsum Lath- 100-120 Metal Lath: 50-65 Gypsum Tile: 85-100 Clay Tile: 65-85 Monolithic Concrete: 90-120 V V '"2" V Finishing Plasters PREPARED TROWEL FINISH PREPARED SAND FLOAT FINISH BESTWALL BESTWALL Whara uniformity and utra hardntss ara dasirad Can ba dee* oratad whan dry--no waiting panod, For uu ovar gypsum basecoat only Whita or gray color Sama as praparad irowat finish axcapt surfaca will ba taxturad. Whita or gray color. 350-400 250-275 Vi* Maximum -- V Maximum WHITE GALuiNG COMMON GAUGING BESTWALL Satin Spar --------------------------------- - BESTWALL Mixed with lima for uxa ovar gypsum basacoat Great work ability: hard, smooth, whita surfaca. Highast grado rock. Avail able m quick sat and alow sat. Mixed with lima for use ovar gypsum basacoat. Selected qual ity rock, light gray color. Gives hard, smooth surfaca. Availabla m quick sat and slow sat. KEENE'S CEMENT MOLDING AND CASTING BESTWALL BESTWALL Sunflower Mixad with lima Givas strong, dtnsa surfaca with high rasistanea to abrasion and watar. Two sots: regular and fast finish. Mad# from rock ovar 98% pure. Gives hard strong molds and casts with low expansion Mixed with watar only for casts Mned with lima and watar for molds. LIME BESTWALL Smooth Finishing Unw (Normal Hydrated) Builder's Lima (Autoclaved) Mutd with gauging and molding plstttri and Ktene s cement to give plasticity, whitsness and bulk Ohio Oolomita Lima furnished normal hydritad and autoclaved ^Available m 50 lb bags only ) * A|1 piasters available m 100 lb. bags except where noted 1600 1600 (4 1 Mix) 550 '/t' Maximum -- Vt' Maximum | V Maximum 1 Up to 750 j V, ' Maximum i if UTH __ 8/STWAU uth Prfor*twd. "Muniing, P:nholath} --- tyAiL , - t :*ngth Lath BSTwAll 1 ~ 'i1ri fP,nhoi]) EMB Round TH toons vmmt V 16"* Round or tongue and groove V edged Vi" 24" Tepered l/ 1 48 ' LQKTN 48" up to 128' io- r -5 . * '* "dth on Pacific coast packed 5 panels per bundle order mmn m/iOM rr. 1500 2000 16" 0 c 24" 0 c RAILS LM./1MS FT. RAIL sta 6B n giuga 52 HAIL SFACUM 5, 2000 Hot AppliCJ be 2000 16 0 c 24 0 c ______ 7 400(01 1 6 400(01 1 l1. ' nf 5hnii nil1 ZWS 5* 1 2: PAROS pa SURDU S' 4 Sn floeo cose r.n Mou^teo SGP 0019119 COMPANY DATA COMPANY Bestwall, the nation's third largest gypsum company, has served builder, architect, contractor and property owner with a full line of quality gypsum building materials and construction components for more than 50 years. FACILITIES Strategically located plants across the nation utilize the most modern equipment and production techniques. In addition, quality control anc. research laboratories continuously check and control the performance of the finished product to meet highest quality standards. An efficient distribution network makes Bestwall a prompt and reliable source of supply. SERVICES Offices m principal cities are staffed by qualified sales representatives equipped to provide further information and assistance and to insure that your selection of materials is complete and applicable. SGP 0019120