Document 6wRL7p8JdRMjo2yObj6Gq9rj9

UNITED STATES GYPSUM Gypsum Plaster, Building Lime, Plaster Bases and Accessories Catalog lincrc r/r&H' Gypsum Plaster, Building Lime, Plaster Bases and Accessories From the industry leader, every type of system for modern construction Giant rotary calciner removes water from crushed gypsum rock--early step in plaster manufacture. HE plastering products of United States TGypsum have earned the overwhelming preference of the building industry for one reason alone: performance. This record of performance extends through the complete U.S.G. line--broadest in the industry--of plaster and lime products, plaster bases and accessories. It rests largely on the compatibility of these components--all designed by U.S.G. to work together. Coming from a single source, they are most capable of satisfying the specific requirements of the job. The unchallenged leader in developing plaster products and systems, U.S.G. also ranks first in . meeting the specific needs of today's building - design. This results from careful refinement of existing products plus the origination of historic U.S.G. "firsts", such as gypsum partition tile, gypsum lath, truss-design studs, perlited plasters ~ and double-hydrated lime. The valuable 260-page aSV Lathing and Plastering Handbook, exclusive with U.S.Grr is the industry's standard guide to good ' procedures and describes newest developments^ includinxg. tu**n' e-e.,a. v..- ing, lower-c -os t methods*.jfc-SvkT's.-jsrrS* .......*" ^ U.S.G.'a Architectural Technical Literature provides If - -u: . v accurate sysstem daetaauils anad speciaficautions..-l$>i^A2jg ___ ' `` ' Product improvements are released only after their superiority has been clearly proved by thorough testing and field trial. Imperial ''i.1 \ i.-- ^Plaster, for example, was subjected^ * to repeated scratching tests : - V-. ` ' -I * .with weighted wire brushes (illustrated). It came . through with negligible . marking and a surface penetration of less than one millimeter. U.S.G. quality standards demand the best. NOTICE: The following trademarks used herein are owned by United States Gypsum Company: USG, RED TOP, STRUCTO-LITE, STRUCTO-BASE, STRUCTO-GAUGE. DIAMOND, ORIENTAL, FIRECOOE. IVORY, CHAMPION, STAR, PYROBAR, IMPERIAL. ROCKLATH. TRUSSTEEL, SUPER-TITE. B RI D JO I NT. BRACE-TITE, TRUS-LOK, MORTASEAL, THERMAFIBER. GRAND PRIZE. TEXOLITE. SHEETROCK. TEXTONE, DURABOND, PERF-A-TAPE, COVER COAT, DURON, WAL-LITE, QUIETONE, EPOXICAL, INSO-BAK. CONCORDE, CHINA-GLAZE. GLATEX, MAYFAIR, SHOWERFOLD. FLOAT-AWAY, FLOAT-A-JUST, DURA-DRI, OURA-STOP, CEMENTICO, TAL, DURACAL, METAL COAT. ACREPOX. Copyright 1972, United States Gypsum Company TYPES OF GYPSUM PLASTERS PLASTER PRODUCTS 3 U.S.G. gypsum plasters lead the field in consistently meeting the highest requirements of quality and time-saving appli cation. The most comprehensive research in the industry, combined with superior manufacturing facilities, maintain them as the finest piasters obtainable. Four types of United States Gypsum plastering products are covered in this catalog: (1) Basecoat Plasters, (2) Finish Coat, Gauging and Ornamental Plasters and Finishing Limes, (3) Veneer Plasters, (4) Special Moulding and Casting Plasters. Application directions and specifications are available in other U.S.G. literature. For the beauty and durability of which plaster is capable, rigid requirements should be followed as to number of coats applied. Three-coat work is mandatory on all metal lath and on edge-supported gypsum lath used in ceilings; threecoat work is desirable on all gypsum lath; two-coat work is acceptable on unperforated gypsum lath when properly supported, and masonry plaster bases. Exceptions are noted below for veneer plasters. In the column at right are general recommendations listed in the order of preference--No. 1 in each case can be expected to produce the highest quality results. Suggested precautions are: Warehousing--Always store plaster in a dry, well-ventilated warehouse. Rotate stocks by shipping oldest material first. season shipment is made from the plant. Dolivoring--Protect plaster bags from moisture, both in transit and stocking on jobs. Wet bags cause trouble. BASECOAT PLASTER (over metal lath) Scratch Coat Brown Coat 1. Structo-Base Gypsum (a) Plaster, sanded 100:2 2. Red Top Wood Fiber Plaster, neat, or sanded up to 100:1 3. Red Top Wood Fiber Plaster, neat, or sanded up to 100:1 4. Red Top Gypsum Plaster, sanded 100:2 5. Red Top Wood Fiber Plaster, neat, or sanded up to 100:1 6. Red Top Wood Fiber Plaster, neat, or sanded up to 100:1 (a) Verify availability with yo Structo-Base Gypsum Plaster, sanded 100:3 Red Top Wood Fiber Plaster, sanded up to 100:1 Red Top Gypsum Plaster, sanded 100:2 Red Top Gypsum Plaster, sanded 100:3 Structo-Lite Gypsum Plaster (sand float finish only) Red Top Gypsum Plaster, perlited 100:2 (sand float finish only) r local U.S.G. sales representative. BASECOAT PLASTER (over gypsum lath) See "Use of Aggregates" table. Page 4. Aggregates 1. Sand 3. Job-mixed Perlite 2. Mill-mixed Perlite 4. Job-mixed Vermiculite Note: Lightweight aggregates should not be used on a construction where sound isolation ia a consideration. FINISH COATS Float Finishes Smooth Trowel Finishes 1. Ivory Finish Lime (92% 1. Ivory Finish Lime and hydrate), Red Top Keenes Structo-Gauge Gauging Plaster Cement and white 2. Diamond Finish Plaster silica sand 3. Ivory Finish Lime, Red Top t cu. ft. Finish Lime, Red Top of perlite fines or fine silica sand Gauging Plaster and white 4. Ivory Finish Lime and silica sand Red Top Keenes Cement 5. Grand Prize or Red Top Finish Lime, and Red Top Gauging Plaster Note: Float Finish 1 and Trowel Finish 3 (except over metal lath) are the only finishes recommended for use over a basecoat containing lightweight aggregate. Finishes 1, 2 and 4 (smooth trowel) provide high abrasion resistance and because of their hardness must be used over a comparably hard basecoat. 4 BASECOAT PLASTERSGYPSUM PLASTER. LIME. BASES & ACCESSORIES Basecoat plasters are applied to bases of masonry or lath, and support the finish coat. Their primary functions are to cover the base and provide a durable, continuous coat to receive the finish coat. There are three types of basecoat plasters: gypsum, lime and Portland cement. Gypsum is the most widely used because of itB workability and economy. Portland cement is used for exterior work and certain specialized uses, while (as a basecoat plaster) lime has been replaced by the more modern products. U.S.G. gypsum basecoat plasters are specifically formulated to control setting time and working characteristics. They can be applied by either hand or machine methods. REO TOP Wood Fiber Plaster is a gypsum plaster containing fine particles of selected wood fiber. It may be used with the addition of water only; however, when used over masonry plaster bases, 1 cu. ft. of sand per 100 lbs. of plaster must be added, and when used as j. scratch or brown coat 1 cu. ft. of sand may be added. Wood fiber plaster can be applied to all standard lath and masonry plaster bases; it is strongly recommended as a scratch coat for metal lath. . Wood fiber neat weighs approximately 14 lass than a sanded . . . gypsum basecoat; has nearly twice the compressive and . -- tensile strength of sanded plaster; generally provides greater fire resistance than sanded gypsum plaster at slightly higher 5^1 cost. Complies with ASTM C28 and Federal-Specification-- 55lSS-P-00402B, Type - '=.- ' . - ^ .V. ~ : REO TOP Gypsum Plaster is a gypsum basecoat requiring the addition of aggregate and water on the job. It is supplied in throe formulations: Regular--for use with sand aggregate, . j^^#!|pjs7hand application; LW--for use with lightweight aggregate, >hand application; Machine Application--for use with sand Is' y ' - or lightweight aggregate. Complies with ASTM C28 and Federal Specification SS-P-00402B, Type II. REO TOP Two-Purpose Plaster is a gypsum basecoat requiring -tk* addition of aggregate and water on the job. Suitable for <. v^jB^either hand or machine application and use with sand or >' - - -- - >-. Sr - lightweight aggregate meeting ASTM C3S. Complies with ASTM C28 and Federal Specification No. SS-P-00402B, Type II. STPUCTO-BASE Gypsum Plaster is a special gypsum basecoat plaster that develops higher strengths than conventional plasters. It is recommended for such areas as handball courts, hospital corridors, schools, etc., or wherever an exceptionally high-strength basecoat plaster is necessary. Complies with Federal Specification SS-P-00402B, Type II, and ASTM C28, "gypsum neat plaster", including a strength require ment of 2800 psi compressive strength. STRUCTO-UTE Gypsum Plaster is a mill-mixed perlite aggregated gypsum plaster which requires the addition of water only. It is formulated in two types: Regular--for use over gypsum or metal lath; and Masonry--for use on high suction unit masonry base only. Structo-Lite weighs less than half as much as sanded basecoat plaster; has a "k" factor of 1.74, providing three times the insulation of sanded plaster. For this reason Structo-Lite is not recommended for use with radiant- heated panels, nor for use over metal lath when a smooth trowel lime finish is to be used. The added fire protection afforded by Structo-Lite is the outstanding contribution of the product. Over-all cost is comparable to job-mixed light weight aggregate plaster. Complies with Federal Specifi cation^SS-P-00402B, Type I, and ASTM. C28. for gypsum ready-mixed plaster. j ' <:/ Portland Cement-Lime Plaster is used for interior applications where high moisture conditions exist, or as an exterior base coat for stucco. Prepared on job in following proportions: Scratch and Brown Coats--Mix MORTASEAL, Mason's Lime with Portland cement and sand in accordance with ANSI A42.2, Type L. Suggested proportioning: scratch coat--1 bag Portland cement, bag lime, 5 to 6 cu ft. sand; brown coal-- 1 bag Portland cement, 1 bag lime, 6 to 7 cu. ft. sand. . Finish Coal--Oriental Exterior Finish Stucco (mill-mixed), or a float (white or colored) or texture finish plaster. " - *7 FINISH COAT PLASTERS PLASTER PRODUCTS 5 finish plasters serve as a leveling coat over the basecoat to provide a durable surface with the required resistance to abrasion. Some finishes are used as a base for decoration while others provide the final finished surface themselves. Some types of gypsum finish plasters require the addition of water only; others are a blend of gypsum, lime and water, or of gypsum, lime, sand and water. They are selected according to job requirement for texture, color, hardness, sound absorption and for compatibility with the basecoat. Three general classifications of finishing materials are (1) prepared finishes; (2) smooth trowel finishes; (3) sand float finishes. The finish coat serves as a leveling coat, as a base for decoration and provides the required resistance to abrasion. Gauging plasters impart an early hardness and strength, minimizing the shrinkage characteristic of lime, finishes may be trowel, float, texture, spray, or a combi nation of these methods. EXTERIOR FINISHES ORIENTAL Exterior Finish Stucco is a mill-prepared, waterresistant finish for use over Portland cement-lime basecoats only. Water only is added. Float, texture, stipple sponge, spatter-dash or rough coat finishes are easily applied; not designed for smooth trowel finish. In white and 7 colors for hand or spray application. EPOXICAL Wall Matrix is a high-strength design medium for creating beautiful and durable building surfaces. Consisting of two components--epoxy resin and a hardener to which sand is added--Epoxical embeds exposed aggregate on exterior and interior surfaces with powerful bonding action. Eight times lighter than concrete, Epoxical helps reduce dead load. Other advantages include: great versatility--applies easily over concrete, concrete block, brick, Portland cement stucco basecoat, exterior grade plywood, cement asbestos board; low cost--applied cost is (a) about one-half that for exposed concrete paneling, (b) significantly less than .for quarried o ^ * |U 6 GYPSUM PLASTER. LIME, BASES & ACCESSORIES stone veneer, (c) when applied over 8' concrete block, usually no more than the cost of 4' face brick backed by 4' common brick; fast setting--allows immediate seeding of aggregate. Hardens in 1 to 6 hours, depending on tem perature, with total curing time of 48 hours. Weatherresistant and unaffected by freeze-thaw cycling, Epoxical Matrix is available in six attractive colors plus white. INTERIOR FINISHES DIAMOND Finish Plaster is an interior finish designed to provide exceptional surface hardness--1M times as great as a l-to-3 job mix of regular gauging and lime. Mill pre pared; requires addition of water only, thus saves labor at site. Provides greater resistance to cracking and delamina tion; has stabilized set, excellent troweling characteristics. Two formulations: Regular Set, (or use over conventional sanded gypsum basecoat, and Quick Set, for use over thin veneer basecoat such as Imperial Basecoat Plaster. GAUGING PLASTERS (for blending with lime putty) STRUCTO-GAUGE Gauging Plaster--A high-strength gypsum . gauging plaster, for extreme hardness and resistance to surface abrasion; Quick or Slow Set. Use only over a high . strength basecoat--wood fiber, sanded gypsum, ^.. v-X' Structo-Base or Imperial Basecoat Plaster. Complies with -w--- ASTM C28 and Federal Specification SS-P-00402B, Type V. RED TOP Keanes Cement--A dead-burned gypsum gauging, ' wk*"cb requires extensive troweling except in regular sand ^ float finishes. This troweling densities the surface for hard-: ^.'*;'^->-^-ness and resistance to surface abrasion. Complies with 'll: tr.- ASTM C61 and Federal Specification SS-P-00410 Type I ;'T , . (Regular) and II (Quick Troweling).'1 _ ; . / ., CHAMPION and STAR Gauging Plasters, White--These con ventional quick- and slow-set gauging plasters are available with perlite fines for use over lightweight aggregated base . coats or unaggregated for use over sanded basecoats. Comply with ASTM C28 and Federal Specification SS-P-00402B, Type V. - .. RED TOP Gauging Plaster--Similar to CHAMPION and Star - Gauging, except in slightly darker color, available either - perlited or unaggregated. Complies with ASTM C28 and ' r : Federal Specification SS-P-00402B, Type V. ` . .. . . FINISHI^NG LIME--S . . IVORY Finish Lime--An autoclaved finishing lime. Does not require soaking, and virtually eliminates possibility of future expansion within the finish coat because of unhydrated magnesium oxides. Complies with ASTM C206 Type S, and Federal Specification SS-L-00351a, Type F (not more than 8% of unhydrated oxides). RED TOP and GRAND PRIZE Normal Hydrate Finish UrnasEconomical and uniform; require soaking at least 16 hours to develop proper plasticity and degree of hydration neces sary prior to use. Comply with ASTM C6 Type N, and Federal Specification SS-L-O0351a, Type F. RED TOP Finish Quicklime--High-calcium finishing lime which requires 16 hours of soaking to develop proper plasririty and required degree of hydration prior to use. Com plies with ASTM C5 and Federal Specification SS-Q-351. HIGH-STRENGTH VENEER PLASTERS IMPERIAL Plaster is a veneer interior product that trims days from plaster finishing schedules and provides exceptionally high strength and abrasion resistance (3,000 psi). Yet its applied cost averages only slightly above that of conven tional drywall. Applied to thickness of Via' to V'; requires only the addition of clean water. Qualifies for ratings of up to two hours and 54 STC in metal-frame and wood-frame assemblies. Complies with ASTM C587. Available in ma chine and hand-applied formulations in two types: IMPERIAL Finish Plaster--for single-coat application com posed of scratch coat and immediate doubling back (except "i C S 0 1 6 2 0 2 8 FINISH COAT PLASTERS PLASTER PRODUCTS T in suspended or furred ceilings) directly over Imperial Plaster Base, glass fiber tape and special comer bead or over Imperial Basecoat Plaster in two-coat system. Provides a smooth trowel, float, or spray texture finish ready for decoration. ' IMPERIAL Basecoat Plaster--for use where two-coat applica tion and a high-strength conventional finish are preferred. Can be applied to either Imperial Plaster Base, Inso-Bak Rigid Insulation, directly to concrete block, or over a bond ing agent on monolithic concrete. Formulated to receive Imperial Finish Plaster, high-strength gauged lime putty, Diamond Finish Plaster, STRUCTO-GAUGE-lime, or Keeneslime-sand float finishes. RED TOP Radiant Haat Plaster is a high-density formulation for use with electric cable ceilings. Allows higher operating temperatures than with other products; provides more efficient heat transmission and greater resistance to heat deterioration. RED TOP Radiant Haat Basecoat Plaster is hand- or machineapplied to cover cable. RED TOP Radiant Heat Finish Plaster is then applied in a '/it' to *4' coat for total thickness of K*- Used over special USG R.H. Base attached to wood joists, to metal furring channel or suspended metal grillage, or over a bonding agent directly to monolithic concrete ceilings. Mill-prepared; requires addition of water only. Meets NEC requirements. U.L. listed. SPECIAL PLASTERS RED TOP Moulding Piaster is used in specialized work such as cast ornamental enrichments or running cornices. The grind is conducive to fine detail; controlled set helps obtain exact reproduction. Available in white and gray colors. Complies with ASTM C28 and Federal Specification SS-P-00402B, Type V. RED TOP Casting Plaster, for general casting shop use, pro duces excellent detail in fine plaques and art statuary. It exhibits exceptional plasticity, maximum surface hardness, strength. Only water is added. USG Art Plaster, for small casts and other rapid-drying applications, is finely ground for excellent reproduction of detail. Works easily and produces high surface hardness. C5016 2029 CS016 2030 PLASTER BASES & ACCESSORIES GYPSUM PLASTER. LIME. BASES & ACCESSORIES ^ The industry's broadest and best-known line of plaster bases* and lathing accessories is outlined on the following pages, in six groups: (1) Gypsum and Mineral Fiber Plaster Bases; (2) USG Metal Lath; (3) Pyrobar Partition Tile; (4) Trim Accessories--USG Corner Reinforcements, Screeds and Control Joints; (5) USG Lath Attachment Clips and Screws; (6) USG Structural Accessories --Metal Studs, Runners, Channels, Brackets, > N '*&*-*- -r - - :: Proper use of U.S.G. plaster bases and plasters provides the * secure bond necessary to develop strength and resistance to abuse and cracking. A "mechanical" bond is formed when plaster is pressed through the mesh or holes of the lath, forming keys on the back side--as with metal lath or per- forated gypsum lath. A "suction" bond is formed when gyp- _ _ r -'t? sum plaster is applied over gypsum lath, rigid insulation and masonry bases; the tiny needle-like plaster crystals penetrate ;J into the surface' pores of the base'by suction. JWhen per- a forated gypsum lath is used, both suction and mechanical bonds are developed.^, X <. -1 GYPSUM PLASTER BASES# .A Rocklath, Imperial and USG R.H. Plaster Bases are gypsum lath in sheet form providing a rigid, tire-resistant? base for the economical application of gypsum plasters. Rocklath requires about 45 percent less basecoat plaster 1 than with metal lath--provides excellent bond, and adds 'v. '-t lateral stability to the assembly, ^ ;c* 'tt5Ca^T.2-fe;v. The special gypsum core of this lath is faced with multi-layer laminated paper designed to check plaster slide and resist lath sag. As illustrated at right, the outer layers (1) are made super-absorbent to draw moisture from the plaster mix so uniformly and so quickly that the plaster takes on anti slump strength before it can slide; the inner layers (2) are chemically treated to form a positive barrier against moisture penetration, thus preventing softening of the gypsum core, which may cause sag after plaster is in place. The face paper is folded around the long edges of all three types of gypsum bases; in addition, the ends of Imperial and USG R.H. Bases are square-cut and finished smooth. These bases are fabricated in thicknesses of V%% 14" and and in eight different products for specific uses as listed below. All 16' and 24' widths comply with ASTM C37 and Federal Specification SS-L-30c, Type I. Veneer bases comply with ASTM C588. Regular ROCKLATH Plaster Base is recommended for nail or staple application to wood and nailable steel framing, for dip attachment to wood framing, steel studs and suspended metal grillage, and for screw attachment to USG Metal Studs and Furring Channels. Perforated ROCKLATH Plaster Base is identical with Regular Rocklath except that $' round holes are punched through the lath 4' o.c. in each direction, one M" diam. hole for each 16 sq. in. of lath area. This provides a mechanical key in addition to the natural plaster bond, and obtains higher fire ratings. Not recommended for attachment to ceilings, either wood framing or metal grillage, where the only support provided is by dips at edges. ROCKLATH FIRECODE Plaster Base is a gypsum lath which combines all the advantages of Regular Rocklath with additional resistance to fire exposure--the result of a spe cially formulated core containing special mineral materials. Long Length ROCKLATH Plaster Base is manufactured for use in constructions requiring floor-to-ceiling-height lath, such as the Solid Rocklath and Plaster Partition System and the USG Exterior Wall Furring System. Lengths are mill-cut as required up to 12 ft. tE o e 10 PLASTER BASES . s * v"*' Sound resistance built in with application of ' ' i Imperial Plaster Base over RC-1 Resilient Channels. i Plaster keys projecting through openings of Junior Diamond Mesh Metal Lath, used here, provide high resistance to cracking and frame movement. ' Foil-Back ROCKLATH Piaster Base offers all the advantages ; - of Regular RoCKLATHasa rigidplasterbase,ismade in the same sizes, but has bright aluminum foil laminated to the back side. This creates an effective vapor barrier at no addi tional labor cost, to combat moisture condensation--a com mon cause of peeled exterior paint, warped siding and rotted studding. Its vapor permeability of 0.67 perms is well below the FHA permeability limit of 1.00. In addition, Foil-Back Rocklath provides positive insulation value when installed with the foil facing a l/i' minimum air space. When used as a ceiling, under winter heating conditions its resistance value is 2.69; in retarding downward heat flow in summer, its effectiveness is nearly double for a resistance value of 4.88 including air space (see table below). Corrosion and normal dust accumulation exert negligible effect on the vapor barrier and insulation characteristics of Foil-Back Rocklath. Long Length Foil-Back ROCKLATH, also with aluminum foil laminated to the back side, is used primarily for furring exterior masonry walls. Lengths are mill-cut as required up to 12 ft.; formed with square edges. Thermal resistance values are as follows: Surface, Haat Flow & Soason horizontal horizontal vertical vertical (up) (dn) (hor) (hor) winter summer winter summer Foil-Back ROCKLATH H' *4* 2.69 4.88 3.89 3.89 2.82 5.01 - 4.02 4.02 Not#: Resistances are bated on still air film. Vfe* tandad planer, and lath wrth one reflective surface facing a 46* still air apace. (Horizontal surface atr spaces are 7Vi*, vertical 46* to 4*.) IMPERIAL Plaster Base is a special gypsum lath in large sheet form, with strength and absorption-characteristics designed for use with Imperial Plasters. Available in Regular, Firecode and Firecode "C" core, 48" wide, H' or *A' thick, 8- to 12-ft. lengths. Both FntEOODE types have fire rated cores which add fire protection and are U.L. listed. The >4' to s4* Imperial Finish Plaster is applied after joints have been covered with Imperial glass fiber lino-weave tape. USG #900 Corner Bead is used. Using the Firecode "C" base, the system qualifies for ratings of up to two hours and 53 STC in metal-frame and wood-frame assemblies. USG R.H. Base is a specially fortified large-size gypsum lath, used with Red Top Radiant Heat Plasters in electric cable ceilings. Nailed or screw-applied to wood joists; screwapplied to USG Metal Furring Channels or RC-1 Resilient Channels; joints are reinforced with IVi wide Imperial glass fiber tape. The system improves heat emission and resistance to heat deterioration. INSO-BAK Mineral Fiber Rigid Insulation is specially formu lated for one-step furring, insulating and lathing interiors of exterior masonry and monolithic concrete walls while meet ing noncombustible requirements for Class A construction. It does not emit toxic gases when exposed to fire. One side of the insulating base provides optimum adhesive bonding; the other side is roughened for use with Imperial Veneer Plasters. The rigid insulation is laminated directly to walls with Durabond 500 Adhesive. After joints have been finished with Imperial glass fiber lino-weave tape, base is finished with `4' to !4' Imperial Basecoat Plaster and *4' finish plaster. Inso-Bak also may be used with USG Z-Furring Channels and screw-attached Imperial Plaster Base and plaster or Sheetrock SW Gypsum Panels. CS016 2032 METAL LATH 11GYPSUM PLASTER. LIME. BASES & ACCESSORIES USG Metal Lath is sheet steel that has been slitand expanded to form a multitude of small mesh openings. It is made in Diamond Mesh, Riblath and Stuccomesh types and in two different weights for each style. All are manufactured from' rust-resisting copper alloy steel, further protected by a coat ing of blade asphaltum paint, except 3.4-lb. diamond mesh which uTalao available in galvanised steel. Not for use with over-aggregated plaster in scratch coat. They comply with Federal Specification w. - -"Si r 4-* Metal lath* embedded' within the plaster provides high resistance to transverse impact, thus decreases the haxards of serious cracks and failures due to structural movement of " the frame. It is readily shaped to ornamental contours to a ' degree not possible with other plaster bases. ;:j^^g;l^'r4-t Ends of bundles of USG Metal Lath^are spray-painted ~r-,, different colon JTorvarioua weights, thus simplifying stodc-^^' ing and handling.'All 8.4-lb!lath is' paintedrsd; 2.6-lb/^$ '^-^E^ diamond mesh and 2.^5-lb. H' riblath are white; 4.04b. US--G Jun'Yior'r*"Diamro' n d Mesh- La- th' i'sa small diamond mesh ^ metai plasterlube (approx. 11,000 meahes per sq. yd.)* A'^~ general all-purpose lathTiest for*ornamental and contour^ plasteringLThe small -meshes conserve plaster and reduce rl*r droppings. Also available in self-furring type having dimple" indentationsspaced li4" o.c. each way for use as^-` ' / USG Poly-Backed Metal Lath USG Poly-Backed Metal Lath is galvanized Junior Diamond': Mesh Lath with 1-mil clear polyethylene factory-bonded to. the bade. Ideal for machine-applied stucco in curtain walls and for plaster in interior partitions. _ - '-rf - - USG 4-Mesh Z-Rlblath is a "flat rib" type of lath with smaller mesh openings, suitable for "double-up" plastering. More rigid than diamond mesh, it is excellent as nail-on lath, and for lie-on work on fiat ceilings. Not recommended for con tour lathing. ' USG %' Riblath comes in a herringbone mesh pattern with %' V-shaped ribs running lengthwise of the sheet at 4M' intervals, with inverted intermediate */fi' ribs. The heavy ribs provide exceptional rigidity. Used when supports are spaced more than 16' o.c. and for 2' solid studless metal lath and plaster partitions. Also used as a centering lath for concrete floor and roof slabs. Unsuitable for contour plaster ing or resilient application. Minimum ground thickness must be 1'. USG M" Riblath provides a herringbone mesh pattern with %' deep V-shaped ribs lengthwise of the lath at 6' intervals. It is a structural lath, providing the dual functions of center ing and reinforcement for concrete floor and roof Blabs; for greater spans than permissible with riblath. It is not recommended as a plastering lath. USG Expanded Metal Stuccomesh is a 1J$' x 3H" diamond mesh pattern designed as a base for exterior stucco, hand or pump applied. It should be applied with 114" galvanized self-furring nails; when used over sheathing other than wood, longer nails providing minimum penetration of 1M" into studs should be used. See technical data on metal lath, next page. o CD O IU O U U 12 PLASTER BASES GYPSUM PARTITION TILE Pyrobar Partition Tile is a precast, kiln-dried gypsum tile for building non-load bearing fireproof partitions. It is the original gypsum partition tile--improved many times, still the leading product of its kind. Because of its light weight--30 to 50 percent lighter than other commonly used masonry units--Pyrobar Tile is ideal for use in office buildings and other structures requiring alterations to suit tenants' needs. Partitions built of Pyrobar require much less structural steel to support them. It is made in 12' x 30' size--2H SQ- ft. of wall surface per side of each tile--in four thicknesses with indented surfaces, in hollow and solid types as follows: 2* Solid, 3* Hollow for column fireproofing and vent shafts 3* Solid, 3* Hollow, 4* Hollow and 6* Hollow, all for partitions and column fireproofing Pyrobar Tile offers economical installation because of its fewer joints than with smaller masonry units. Its machinemoulded units lay accurately to form a level surface, require less plaster and mortar than other types; easily cut, handled and maintained. It also is the most compatible masonry plaster base for gypsum basecoat plasters. As another advantage, Pyrobar provides the greatest fire protection per inch of thickness of any commercial partition assembly; fire ratings up to 4 hours. It offers excellent sound transmission loss ratings when plastered two sides, further improved by resilient lath and plaster facing on one side. Complies with ASTM C52 and Federal Specification SS-T00316a. Portland cement and lime mortars do not bond adequately with Pyrobar: RED TOP Partition Tile Cement should be used. Likewise, Portland cement or lime plasters cannot be used over Pyrobar Tile. Red Top Gypsum Plaster is recommended. PYROBAR Partition Tile CS016 2034 TRIM ACCESSORIES 13GYPSUM PLASTER, LIME, BASES & ACCESSORIES USG Trim Accessories--corner reinforcements/ screeds,*^* * ~ metal trim, control joints and joint reinforcement tape--- 4*' enjoy the industry's top acceptance because of their dependa^gtl bility and continual improvement in design. USG Comer^T'i : Beads should be used on all external plaster corners to pro^T.':. vide plaster protection, true and straight lines at corners,''^'.; and grounds for plastering; USG Casing Beads around wiD".';^ openings and at intersections of plaster with other finishes?^1'' USG Screeds are used to divide different types of plaster finishes and as a separation between plasteranda cement^.//^T-^ base, or as a permanent noncombustible sensed^ to control^4^4^*-- plaster thickness and alignment beneath tile wood or otberstSR/gijf, r. "Bid base They are made from top-quality galvanixed stoel--^comer^ 4:'-4_4 beads and screeds from 26-ga., caring beads from.24r-ga. stehLjSftisifej'&S: 1-A Expanded Corner Bead has wide expanded flanges that; are easily flexed. Preferred for irregular comersTProvided increased rrinforcement close to nose of bead.' . yv -* ~V\ ^ 4-A Flexible Corner Bead is a general purpose corner! economical and most generally uaed._By snipping flangy| this bead may be bent to any curved design (for archways^ telephone niches, etc.). Can be secured to comers with Corner Bead Clips attachedto: 4-R Expanded Comer Bead is an i small nose and totally expandedV wide I increase plaster keys* and., minimise^ conjer/c general purpose bead forstraightor arched < 10-A Expanded Comer Bead is similar to 4-R Bead but with* 2M' wide expanded flanges. Espedallysuitablebn irregulax^L, *. comers. . , -"-z. -r..\ v- -j.sc^C.'SL55S5b-e?.re*va<ce.>kr-<-** 900 Comer Bead serves dual purpose with either one- or two-" v coat Imperial Plaster Systems. Gives 4' grounds, and its 1W fine-mesh flanges can be either stapled or nailed. Pro-^ _ vides superior plaster key and eliminates shadowing.- - > '' ' ' Cornerite and Striplath are strips of printed copper alloy ': Diamond Mesh lath used as reinforcement. Selv-edge Cornerite, bent lengthwise in the center to form a 100 angle, should be used in all internal plaster angles where metal lath is not lapped or carried around; over non-ferrous lath anchored to the lath, and over internal angles of masonry constructions. Optional in Resilient ROCKLATH lathing sys tems; used in the "Floating Angle" method of applying gypsum lath to wood framing to reduce plaster cracking. Striplath is a similar fiat strip, used as a plaster reinforce ment over joints of non-metallic lathing bases and where dissimilar bases join; also to span pipe rhsmti .. Vr USG Casing Beads (styles shown at left and below) are used as a plaster stop and exposed to eliminate the need for wood trim around window and door openings; also recommended at junction or intersection of plaster and other wall or ceiling finishes. May be used with USG Metal Lath, Rocklath EL U..-J -B| L nton 1o0 u tv No. 138 Quarter Round No. 60 Semi*Square No. 66 Square (short llange type) (short flange type) (expanded flange type) 14 TRIM ACCESSORIES Gypsum Plaster Base, or masonry construction. In order to insure proper grounds for plastering, A' casing beads are recommended for use with metal lath, A' beads with all masonry units, A' beads when the flange is applied under Rocklath Plaster Base, A' beads when the flange is applied over Rocklath. 6-A Plain Base Screed is a flush type A' ground O'ob- shimmed for A' grounds), used as a straight divider strip between different types of plaster, as between gypsum and Portland cement. : . . 7-A Curved Point Base Screed is a dividing strip for use between plaster surface and projecting Portland cement base. Upper ground is A', bottom ground is 1'. " . 8-A Picture Mould provides a concealed mould, attached to r, . \ lath and plastered flush to the notch opening, leaving.a A' ?*; wide slot into which hooks may be inserted to support j- Z- lV:'. pictures, maps, etc. Grounds A' Gob-ehimmed for A' ^ grounds). . . USG Motal Trim comes in two styles to provide neat edge " ' protection for veneer plastering applications at cased open- . v' ' ings and ceiling or wall intersections. Made of galvanized >-" steel, both have perforated flanges to strengthen the plaster bond. They fit over edges of A' or A" Imperial Plaster Base, and provide grounds for Imperial Plasters. No. 701-A--V is channel-type casing nailed to door or window buck. No.`r- ;';. 701-B is an angle edge trim used at junction of plaster base ' with rough concrete or masonry ceiling--attached by stapling when used with USG Metal Studs. . d,; ^ ; . P-1 Vinyl Trim is a channel-shaped rigid trim with flexible ' vinyl fins which compress on installation to provide a posi tive acoustical seal comparable in performance to one bead of acoustical sealant. For perimeters of Imperial Plaster partitions using A' or A' plaster base. P-2 Vinyl Trim is a channel-shaped vinyl trim with a pressuresensitive adhesive backing for attachment to the wall at wall-ceiling intersections. Provides positive perimeter relief in radiant heat and veneer plaster systems. Allow A' to A' clear space for insertion. CS016 2036 USG Control Joint is designed to relieve stresses of both expansion and contraction in large plastered areas. Made from roll-formed zinc, it is resistant to corrosion in both interior and exterior uses with gypsum or portland cement plaster. An open slot, A' wide and A' deep, is protected with plastic tape which is removed after plastering is com pleted. The short flanges are perforated for keying and attachment by wire-tying to metal lath or by stapling to gypsum lath. Thus the plaster is key-locked to the control joint, which not only provides plastering grounds but can also be used to create decorative panel designs. Sizes and grounds: No. SO, A'; No. 75, A"\ No. 100, 1* (for use such as exterior stucco). USG Control Joint No. 093 applies the same functions of the regular control joint (above) to Imperial Plaster veneer installations. Made of zinc, with A' ground dimension 8nd a tape-protected A' opening V(j* deep. Used from floor to ceiling in long partition runs, and from door header to ceiling. LATH ATTACHMENT CLIPS AND SCREWS gypsum plaster, ume. bases & accessories 15 IMPERIAL Tap* is a special 2X' wide glass fiber lino-weave tape designed to reinforce joints of large-siae Imperial and USG R.H. Plaster Bases prior to finishing with the veneer plasters of those systems. Open weave of tape allows rapid air escape during plaster embedding; highly crack resistant. Two types: "P"--pressure-sensitive, and "S"--staple-at tached. For estimating purposes: finishing 1,000 sq. ft. of surface requires about 370 linl ft of tape. _ .... A complete line of specially formed steel clips and self drilling steel screws is available to provide positive attach ment and rapid erection of U.S.G. gypsum plaster bases and metal lath. Various types are designed for use with ten different U.S.G. partition and ceiling systems. ~`'-s Bridjoint Clips^provide a rigid alignment of Rocklath . Plaster Base where ends of lath do not fall on structural members, thus adding crack resistance at vulnerable points; Brace-Tite Clips, of special wire, attach X' Rocklath to memu ceiling grillages, exterior wall and beam furring chan nels; Trus-Lok Clips attach X' Rocklath to Trussteel Studs; USG Bracing Clips and Ceiling Runner Clips attach Long Length Rocklath to channels and runners^, ^ USG Resilient Clips provide a non-rigid or floating attach ment of X' Rocklath Plaster Base and USG Metal Lath to the structural frame, thus affording increased protection against plaster cracking due to structural movement, and increased sound resistance.' . .. ------ -H. , .... ,...... '-T- USG Brand Screws are used to attach veneer plaster bases to metal or wood framing; are also an alternative to MS-1 Clips in attachment of Rocklath to USG Metal StudsI^V '-Cir-J. SJr1 - ts *? A. ~1 - JPm- `V.'lS.JrV.'';i^Y t* Viin^ 16 CLIP ACCESSORIES BRIDJOINT Field Clip B-l is used to support end align end joints which do not fall opposite structural members; sizes for both i4' And Y' Rocklath. BRIDJOINT Corner Clip B-2 is used in conjunction with B-l dips to eliminate nailing in comers and angles; also when ceilings are resilient and walls nailed direct and vice versa. For X' Rocklath only. BRACE-TTTE Field Clip BT-1 is used for suspended ceilings, exterior wall and beam furring and hollow pipe chase par titions. Provides support across full width of lath. For use with standard Y' cold-rolled channels. BRACE-T1TE Starter Clip BT-1 is used in conjunction with BT-1 Field Clip to start first course of lath. TRUS-LOK Field Clip TL-1 is designed for attaching %' Rocklath Plaster Base to Trdssteel Studs. TRUS-LOK Starter Clip TL-2 is used with TL-1 Clips, MS-1 Clips and runner track to start first course of lath. TRUS-LOK Drive-in Clip is used to anchor (1) bottom course of lath in direct attachment to Trussteel or USG Metal Studs, and (2) top course of lath in partitions to underside of monolithic concrete flat slab or concrete joist filler con struction; also as starter-finisher clip with Metal StudRocklath partition. MS-1 Clip serves for quick, direct attachment of Y' Rocklath to channel-type USG Metal Studs. SUPER-TITE Clips, applied with a special gun, attach diamond mesh lath to Trussteel Studs. USG Bracing Clip attaches Y' channels to Y' Long Length Rocklath as temporary braces in 2' solid Rocklath and plaster partition construction. Calling Runner Clips are used for attaching Long Length Rocklath to "L"-shaped ceiling runners. Resilient Clip TR-1 attaches */ ROCKLATH to TRU8STEEL Studs spaced 16' o.c., furs lath Yt' from stud face. Resilient Starter-Finisher Clip R-SF is used with starting and last courses of resiliently attached Rocklath Plaster Base on wood studs or Trussteel Snap-In Runner Track. Resilient Clip R-l for wood framing spaced 16' o.c., is attached by nailing with 13-ga., \Y% lathing nail. Rocklath is floated i4' free of framing members and held in place by clip. Resilient Clip R-2 is for internal angles of wood frame con struction when both surfaces are resiliently furred. Furs lath Y' from framing. Resilient Clip R-5 is used on masonry walls or for face attachment over sound deadening board. Rocklath is resiliently furred out Ym from face of masonry or backing board. Resilient Clip No. 100 is used to resiliently fur Y' coldrolled channels from 1Y' runner channels in suspended ceiling construction. Alternate clips on each channel are reversed. Lath is furred 1Y' from runner channel. Resilient Clip No. 200 attaches Y' pencil rods to wood studs or joists, thus floats metal lath Y' free of framing members when lath is wire-tied to rods. On walls, rods are snapped into clips; on ceilings, clips are slipped onto rods. Clips are attached with 13-ga. 1Y' lathing nails. Resilient Clip No. 400 is snapped over outer flanges of Trussteel Studs. Y' pencil rod is snapped into protruding tongue of clip, and metal lath wire-tied in place Y' from stud face. ' Resilient Clip No. 500 provides furring and resilient attach ment of metal lath on masonry surfaces. A Y' channel is wire-tied inside protruding tongue of the clip and metal lath is tied to channel, thus is furred out Y' from face of masonry. USG Brand Screws are the recommended means of attach ment of large-size Imperial and USG R.H. Base, as well as of Rocklath Plaster Base in certain applications. Twenty different self-drilling, self-tapping steel screws, complying with ASTM C646, can be used in plastering systems; applied by power-driven screw gun (illustrated). Applica tions are listed at left. Ci U) O 0> oru CJ CD STRUCTURAL ACCESSORIES GYPSUM PLASTER. LIME. BASES & ACCESSORIES 17 U.S.G. leads the industry in the development of structural components for plastering systems. Designed for use with T both gypsum plaster bases and metal lath, these accessories ' help provide established fire ratings and improved sound transmission loss. They offer the advantages of light weigh! low material cost and quick erection, superior strength, aha versatility. All are noncombustible, made from galvanizdfl steel or rods. : L - . . ' -. . v USG metal runners provide secure anchorage, alignment and installation economies for various plaster partitions and wall furring assemblies. Also included are non-load bearidg studs of the truss and channel types, complete with runner ' tracks, shoes and screws as needed; hat-shaped and U- shaped furring and lathing channels, and an adjustable wall . furring bracket. J ' y -> ^ plaster membrane. Limited chasewaya are provided by . . punchouts in the web. Can be spliced with screws or wire ties. Partitions using these studs are low in coet with excellent sound and fire resistance characteristics. Comply with ASTM C645. 20-ga. USG Metal Studs and Runners, channel-type and rollformed from galvanized steel, are used in non-load bearing ' exterior curtain wall systems. Available in four widths. Runners have 1' unhemmed leg. Comply with Federal Specifications QQS-698 and QQS-775d, Class d.^-,....,, _. . USG Metal Runner is_supplied in eight stud widths for use at floor and ceiling. The galvanized steel track also functions as a header over metal door and borrowed light frames. USG Celling and Floor Runners, of 26-ga. galvanized steel, come in two models: L-Type Ceiling Runner to provide top anchorage for studless metal lath or Rocklath solid plaster ' partitions, and Z-Type Ceiling Runner to anchor and align - " Ji' channels in either solid partition * construction or . exterior wall furring. 'I J&c-.- TRUSSTEEL Studs are the original open truss design studs for '( the erection of hollow, fire-resistant partitions. The strongest . . ' non-load bearing studs on the market, they are formed from cold drawn 7-ga. steel wire rods with a tensile strength of . 90,000 psi--substantially higher than hob-rolled sheets from ' \ which pressed metal and edge angle studs are formed. \v * Made with a continuous diagonal wire web welded to double / wire flanges, Trussteel Studs are fabricated in five stud widths: 154', 2H*. 3!4', 4' and 6', factory-cut to job lengths. The open-web design readily accommodates pipes, conduits and ducts without impairing the strength of the partition assembly. This engineered member, together with its accessories (listed, right), provides a framework for easy direct or resilient attachment of metal lath, Imperial or Rocklath Plaster Base--the best sound-isolation parti tions in the industry and the most economical. TRUSSTEEL Snap-In Runnar Track is used in anchoring the Trussteel Stud partition to the floor. Attachment of stud to track is by a snap-in feature. When track serves as a ceiling runner, stud shoes are used if a fire rating is required. Available for all except the 6' width of Trussteel Studs. TRUSSTEEL Runner Track is used with TRUSSTEEL Stud Shoes to anchor the partition to the floor or ceiling, particularly where there is considerable floor-to-ceiling height variation. Available for all widths of Trussteel Studs. Where top track is attached to suspended or furred framing, 1' tapping screws are used to anchor top course of lath into web wires of studs. ' TRUSSTEEL Stud Shoes, V long, connect, studs to regular runner track--permit up to 4' adjustment in partition height. In 20-ga. (for curtain wall) or 24-ga. steel. USG Metal Studs are non-load bearing channel-type members roll-formed from galvanized steel in eight stud widths. The secure rigid screw or clip attachment of the plaster base utilizes the full structural contribution of the lath and CS016 2039. 18 STRUCTURAL ACCESSORIES CS016 2040 USG Metal Furring Channel is a roll-formed hat-shaped sec tion of galvanized steel. It may be attached with furring clips to VA' main carrying channel and spaced 16' o.c. for economical screw attachment of Rocklath as a base for either adhesive attachment of acoustical tile or a basecoat plaster; 4-ft. span. The furring channel also provides non combustible furring for exterior walls, spaced up to 24' o.c. Face width 15^', depth %' USG Z-Furring Channel is used to attach rigid mineral fiber and foam insulation and Imperial Plaster Base to masonry walls. Furring helps minimize effects of structural stresses; prevents wicking of moisture to inside surfaces. Made of hot- dipped galvanized steel. Easily applied with standard fasteners. Furring depth 1'; flange widths and 1 \i'. USG Adjustable Wall Furring Brackets are used for attaching furring channels to exterior masonry walls. Of 20-ga. galvanized steel with corrugated edges, they are wire-tied to horizontal stiffeners, 24' o.c., in braced furring systems. Normal furring depth is M" to 2 with USG Furring Channels, depth is increased by %'. USG Lathing Channels are cold-rolled from 16-ga. steel, black asphaltum painted; used for furring, suspended ceil ings, partitions, and ornamental lathing. Four sizes. RC-1 SHEETROCK Resilient Channel is a galvanized steel channel for resilient attachment of Imperial and USG R.H. Bases to wood framing. This is one of most effective, lowest-cost methods of improving sound transmission loss through partitions and ceilings. Flange is prepunched for fastening by USG 114' Type W or S Screws to wood frame. Base is attached to channel by USG 1' Type S Screw. Chan nel is 2%' wide x $$' in depth. USG Wall Ties are y%'xV corrugated galvanized steel anchors used to tie masonry veneer to the structure. USG Tie Wire is 18 and 16-ga. galvanized soft annealed wire for tying metal lath to channels and furring to runner channels; also 8- and 9-ga. Hanger IFire for suspending ceiling channel runners when spaced not more than 4 ft. o.c. Estimating Method--Ceiling Components: for making quick quantity estimates of channels and tie wire required in suspended ceilings, this "rule of thumb" method is widely used: (1) Determine surface area in square feet. Example: Ceiling area 30 X 100 ft. - 3,000 sq. ft. Divide by 9 to determine square yards of metal lath required. Assume standard suspended ceiling construction of 1H' runner channels 4 ft. apart, and %' furring channels either 12', 13 W or 16' apart, depending on type and weight of metal lath used and allowing for channels adjacent to walls and for channel splices. (2) Quantity of 1M' channels 4 ft. apart-- divide sq. ft. area by 3.2 (3000 divided by 3.2 -- 938 lin. ft.). (3) Quantity of Ji' channels 12' apart--multiply sq. ft. area by 1.1 (3000 X 1.1 - 3300 lin. ft.). (4) Quantity of l4` channels 16' apart--multiply sq. ft. area by 0.8 (3000 X 0.8 -- 2400 lin. ft.). (5) Figure tie wire at approx. 10 lbs. per 100 sq. yds. of lathing. / | | i I j | ; MASON'S & AGRICULTURAL LIMES GYPSUM PLASTER, LIME. BASES & ACCESSORIES Lime is the ingredient most essential in producing a good masonry mortar. When properly combined with sand and Portland cement, it creates a lime mortar of superior per-. formance and almost ageless durability.' ' . ': With lime mortars: better keying between mortar and masonry units. Because of its high plasticity and ability to retain water,'1 lime mortar provides excellent spread and flow under light L,,fe y pressure of the trowel--workability characteristics that a- AKj*j sure full uniform mortar joints. The cohesive qualities of J C. lime mortars produce superior bond strength, reduce mois bM ture penetration and help*ta prevent' efflorescence, leaky, - w *w'a*lTla and.Vfvr*o-'st damaged _____ _ __ __ , . _ _ .. Mortars using U.S.G. lime offer numerous advantages over '< the prepared masonry cement types of mortars. They require' : less retempering during use and show far greater elasticity, thus exhibiting superidr~crack'resistance! They/`re-knit" to automatically "heal smalbcracks that may develop. _ r gain strength over a period of years'iiuring wettinffand dry^ ume change due to unhydrated material; high sand-carrying '^"'capacity. Also employed as an ingredient in the basecoat to strengthen exterior stucco, and to contribute water resiss3sk tance to the back-up basecoat for ceramic tile Complies with ASTM C207 Type S, Federal! Specification SS-L-00351 ' Type M, National Lime Assn. Type -vS*- --;A T,- R^'REDTOP Mason's Hydrated Lima, available either as dolomitic ing cycles. Theyjeduce initial costs bettuse of their high' brilngb-ailcium! imparts^smootl^-workinir'qualities by,, -V.; . volume, excellent sand-carrying capacity, rapid and neat'AX. Increasing the plasticity and water retentivity of the mortar! y, - workmanship, and minimum waste; also need little maintop Excellent bonding qualities resist high or uneven suction in nance.a..n.d...t.h.us*-provide long-range co-n-o-m--y-? United States Gypsum produces four _ pro-dvu~c~ts*for versat~ile' and" economi-od -mo--r the"maaonry*unita! Thislime'provides'adequate strength;'with low volume, change,! butjrequirea^ovemight^soaking.^j, ComplieswithASTM' C207 Type~N, .Federal Specification L-00351.Type M; National LimeAssh! Type Nj^riK^ri MORTASEAL Air, Uv^.-iov uicaoi . REDITOP ................. Mason's Quicklime is a pulverized product of um-'l .-^*A5t-. ^- hydrated dolomitic mason's'lime'ao' formulated that If -----quailty^andhigh putty yield--generally exhibits the ' it, trains (traps) air in the mortar'when mixedjrith'portlani ' highest plastiaty and earnest working' qualities of any type of X cement and sand. The entrained air goes completely through' the mix, and takes the'water witliIt. The result lsTmbrtar| mason'slime. Developsinto a putty of adequate strength and UX iow%o1uiDe ^hange. Must be handled carefully* however, ~ . that is deeply penetrating and easy to handle, contributing landmoust !be property slaked and aged at least 16 hours, ^ to better masonry construction at lower cost. Makes posKg properly cooled before using. Complies with ASTM C5, sible increased production--15 minutes from bag to board--- , ,. . . . . , , . -!\J5:'.`;. Federal Specification SS-Q-00351, Type M.'"Av- needs shake-up only once an hour, thus is particularly suited-- . - , ... ... - to hot weather construction. Absorbs vibration and stress ' See U.S.G. Portfolio L-25 for complete mason's lime data: without cracking, resists suction, requires no slaking or soak- _ ASTM specifications, test results, recommendations for ing, permits an increased volume of sand (approx. 14 cu. ft!) various masonry types. - " , . without sacrificing workability. In high-rise structures, con- j; Other USG Building Lime Products include MORTASEAL Tile- tractors using this lime have reduced costs by pumping the ! - setters' Lime and Mason's Lump Quicklime--Crushed or mortar to points as high as 185 ft.--a difficult task with Pebble. ` . . other mixes. Complies with ASTM C207 Type S and Federal Specification SS-L-00351 Type M. In special 3-ply bag. General Purpose and Agricultural Limes are produced under the Red Top brand and include a Dolomitic Double Hy MORTASEAL Regular Mason's Lime is the standard of the drate, a Dolomitic Hydrate, and two High-Calcium Hydrate industry. Double hydrated, it is a dolomitic lime requiring products. They are used for soil sweetening of lawns and no soaking. Develops exceptional plasticity and workability, gardens, general sanitation purposes, and as an ingredient produces unusually high water retentivity. Negligible vol- in spray mixtures of insecticides and fungicides.