Document aJNbNjGn2NqwXzL87NJ32Y6G9

PAOLI, PENNSYLVANIA TO: ALL REGIONAL SALES MANAGERS ALL AREA SALES MANAGERS ALL SALESMEN DISTRIBUTION DIVISION SALES PERSONNEL BY: C. E. Abbey:jw CC: R. I. Fredericks, Paoli K. A. McCaskill, Pao1i M. M. Powers, Paoli General Sa1_ August 12, 1966 SUBJECT: FIRESTOP RE: F1oor and Ceiling Assemb1ies FILE: Wallboard Manual - Section 5 (C) Firestop Forwarded herewith is a copy of a two-page folder distributed by the American Plywood Association in their "Concepts" series which are sent to architects all over the country, as well as to a wide distribution to people in the building field. This is identified as No. 112 "Fire Resistive Plywood Floors and Roofs". Please review the material carefully. It summarizes the many floor and ceiling assemblies in which Firestop can be used with plywood. Study each of the six assemblies carefully. Bear in mind that Bestwall's Firestop, 1/2" thick in some cases and 5/8" thick in other cases, can be used where the fire rated board is shown. Notice Figure 2 shows a mineral acoustical ceiling tile assembly which is not applicable to gypsum board products. The American Plywood Association is obtaining building code approvals of these various assemblies with their plywood. We have obtained approvals of many of the floor and ceiling assemblies with Firestop. Underwriters' have changed the listing of various approved 1 hour floor and ceiling assemblies which Bestwall has tested in the past with conventional wood finished floor over wood sub-flooring and broadened the approval to include plywood. Use the No. 112 "Concepts" as a ready reference to sell Firestop in the various floor and ceiling assemblies detailed. Erie 1 . SGP 0025666 FROM THE AMERICAN PLYWOOD ASSOCIATION / FOR ARCHITECTS / ENGINEERS / BUILDERS NUMBER 112 FIRE RESISTIVE PLYWOOD FLOORS AND ROOFS NEW PLYWOOD CONSTRUCTIONS RECEIVE ONE-HOUR FIRE RATINGS A wider selection of one-hour rated plywood systems is now available to architects and engineers. This means that economical plywood construc tion can be used in larger commercial buildings. Plywood stressed skin construction is included in these one-hour systems for the first time. Plywood is now shown in 25 one-hour assemblies in the Underwriters' Laboratories "Building Materials List." Several of these are illustrated on the following pages. Ceilings are the primary variations in the other plywood assemblies listed. CONSTRUCTIONS RECOGNIZED BY BUILDING CODES The listing of these plywood assemblies is based on fire tests made at Underwriters' Laboratories in accordance with the Standard Fire Tests for Building Construction (ASTM E119). All major building codes (Uni form Building Code, Basic Building Code, Southern Standard Building Code and National Building Code) accept fire tests made in accordance with these tests. Many building authorities had already recognized plywood in one-hour rated systems -- the tests confirmed the adequacy of these constructions for this rating. The constructions listed provide several choices for designers. Variations are generally permitted, but should be confirmed with local building officials. Designs shown in the "Building Materials List" are referenced to serve as a guide for modifications. ONE-HOUR CONSTRUCTION PERMITS AREA INCREASES With one-hour construction, larger buildings may be built with plywood. Since plywood construction is commonly the most economical building method, this can save you money. Consider a one-story school built outside the fire zone under the require ments of the Uniform Building Code. Where the school was built with one-hour frame walls and a one-hour plywood roof, each building could have an area of 15,700 sq. ft. between fire walls. The same school built outside the fire zone under the requirements of the Basic Building Code could have the following areas when separated 30 ft. from other buildings. With one-hour frame walls and a plywood roof, maximum area is 15,300 sq. ft. per building. (When each classroom exits directly to the outside, this increases to 45,900 sq. ft.) When of Ordinary type construction with a one-hour plywood roof, maximum area is 20,000 sq. ft. per building. (When each classroom exits directly to the outside, this increases to 60,000 sq. ft.) PLYWOOD QUALIFIES FOR HEAVY TIMBER ROOF CONSTRUCTION Heavy timber construction is one of the oldest types of construction used in this country. The excellent fire endurance of this type construction has been demonstrated over a period of many years. Now 1 Ye" plywood can be used for roofs in the Heavy Timber classifica tion. This makes this type construction even more economical and useful. Plywood's use in this type construction is illustrated on the back page. SGP 0025667 Additional information available from the American Plywood Association / Tacoma, Wasmngton 98401 Copyright 1964 American Plywood Association One-hour floor 2-4-1 is recognized in one-hour con structions because its V/g" thickness is equivalent to other recognized twolayer plywood systems. A gypsum board ceiling is applied directly to the underside of the joists in this system. One-hour roof This same construction is recognized for one-hour roofs. References ICBO Research Recommendation 1007.9. Figure 5. One-hour assembly -- IVfe" plywood with beams 48" o.c. Figure 6. One-hour stressed skin plywood construction. One-hour floor lVs" 2-4-1 over beams 48" o.c. and %" fire resistive gypsum board are the basic elements in this one-hour con struction. The metal furring strips carry the ceiling across a maximum beam spacing of 48". One-hour roof This same system is well suited for one-hour roofs. References UL Design* No. 28. SGP 0025668 One-hour floor This plywood stressed skin construc tion is the thinnest one-hour com bustible assembly which has passed Underwriters' Laboratories tests. The layers of fiber insulation board and fire-resistive gypsum board are applied in the field. One-hour roof This same system is well suited for one-hour roofs. References UL Design* No. 47 (to be published in future edition of "Building Mate rials List.") MATERIAL REQUIREMENTS These materials are required in one-hour ply wood assemblies. Refer to Underwriter's Labora tories "Building Materials Lists" if additional information is required. a. Subflooring -- Minimum V2" DFPA CD with Exterior glue plywood. b. Subfloor-Underlayment -- V/e" tongue-and- groove DFPA 2*4*1 with Exterior glue plywood. c. Underlayment - s/8" tongue-and-groove DFPA Underlayment grade plywood. d. Stressed Skin Construction - s/e" DFPA CD with Exterior glue plywood glued to mini mum 1200 psi 2 x 6's at 12" o.c. Fabricate in accordance with American Plywood Asso ciation Fabrication Specification SS-8. One-hour floor A conventional plywood floor combines with fire resistive gypsum board in this one-hour rated assembly. Acoustical tile ceilings supported on splines can also be used. One-hour roof Most codes do not require the top layer of plywood and building paper when this assembly is used for onehour roofs. References UL Design* No.'s 25, 33, 34, 41 (Gypsum board ceilings.) UL Design* No.'s 9, 12, 15, 16, 20, 38 (Acoustical tile ceilings.) Channel mav be suspended bettv. joists One-hour floor Mineral acoustical ceiling panels are suspended below a conventional ply wood floor in this one-hour construc tion. A T-bar grid suspension system carries the 2' x 4' acoustical panels. One-hour roof Most codes do not require the top layer of plywood and building paper when this assembly is used for onehour roofs. References UL Design* No.'s 17, 21, 22, 23, 27, 30, 31, 36, 37, 39. Figure 1. One-hour assembly -- resilient channel ceiling system. One-hour floor %" gypsum board is attached directly to the underneath side of the joists in this construction. Similar construc tions with %" plywood subflooring and Vi" plywood underlayment have been widely accepted for years because of similarity to other rated systems. One-hour roof Most codes do not require the top layer of plywood and building paper when this assembly is used for onehour roofs. References UL Design* No.'s 1, 29, 42. Note: This construction is also recognized for 45 min. assembly (UL Design* 1) and 30 min. assemblies (UL Designs* 1 and 2) with a Vi" or less gypsum board ceilings. *See Underwriters' Laboratories, Inc. "Building Materials List" Class E-l designs. Figure 3. One-hour assembly -- ceiling attached directly to joists. HEAVY TIMBER ROOF CONSTRUCTION Most building codes include a type or classification of construction referred to as "Heavy Timber." In this type of construction, fire resistance is attained with extra thick materials (codes specify mini mum thicknesses), construction details, avoidance of concealed spaces, and other factors. Heavy Timber type construction is widely recognized as comparable to one-hour constructions. Full scale fire tests have shown that 1 ys" 2-4-1 plywood provides the same good performance as nominal 2" tongue-and-groove lumber decking. See Figure 7. For this reason 1 ye" plywood is rapidly gain ing acceptance for Heavy Timber roof construction. The Uniform Building Code recognition of tongue-and-groove 2-4-1 in this appli cation is one example. (Research Recommendation No. 1007.9.) For More Information Write American Plywood Association, 1119 A Street, Tacoma, Washington 98401 for Plywood Constructions Systems, Form No. 65-310. This 48-page guide shows how plywood is used for roofs, walls, and floors in commercial and industrial buildings. It is a new publication first released in December, 1965. SGP 0025670 AMERICAN PLYWOOD ASSOCIATION A.I.A. F ILE NO. 2 3 -L N .A.H .B. IN D EX NO. 3 4 0 FIRESTOP TYPE XXX GYPSUM WALLBOARD Improved Bestwall Flrestop Is a gypsum wallboard reinforced with specific amounts of in combustible glass fibers and unexpanded vermiculite. Under heat this results in a thermal stabilized core which provides increased fire protection. Now, through greater glass fiber reinforcement, Firestop's fire resistance has been further increased, as shown by the chart on the back of this sheet. The higher glass fiber content also gives increased strength and better nailing qualities. Bestwall Firestop in various assemblies carries ratings of 45 minutes to 3 hours fire resistance. These ratings meet Building Code requirements for interior wall and ceiling construction in buildings of all types, from wood frame to highly incombustible, and for various occupan cies of residential, public, and commercial character. Extra glass fiber content gives greater protection, additional flexural strength to minimize breakage in handling and installation, and better nailing qualities Various assemblies provide 45 minutes to 3 hour fire protection No joint treatment of any kind is required to obtain fire resistant ratings One of the lowest cost 2 hour fire resistive incombustible floor and ceiling assem blies available Large, lightweight panels handle easily Official Fire Hazard Classification by U.L. 10-15 Flame-spread U.L. Label Service Symbol appears on twin mounting tape binding each bundle of two pieces Vi" or %" "Bestwall Firestop Type "XXX" is marked frequently along the center so that Firestop is easy to identify when in place Lowest weight %" Fire rated board approximately 2250 lbs./1000 sq. ft. Bestwall Firestop is recommended where fire resistance is desired, and/or for Building Code Requirements, o'f 45 minutes to 3 hours for interior wall and ceiling con struction in residential, commercial and public buildings. Thickness: Vi", %" Length: 6' to 16' (in even feet) Width: 4' (2' on order) Edges: Tapered or Square (Tongue and Groove backer only) Packaging: Twin Mounted, end taped Application: Horizontal application is recommended for new improved Firestop. Start application in upper corner, working across and down. Either cut openings out of full panels or plan joints to occur on the studs nearest the center of the openings. No joint treatment or further surface treatment of any kind is required. Nalls: Wallboard Nail Spaclngs Thickness Walls Ceilings 5d--1 %" long-- Vi" 5d Cooler 15/64" head--13)6 ga. 6d--1 %" long-- Va" head--13 ga. %" 6d Cooler Drywall Screws Vi" or %" Length Varies 7" 7" 12" 6" 6" (over) SGP 0025671 GP-6701 6EORGIA-PACIFI C / BESTWALL GYPSUM DIVISION A.I.A. FILE NO. 2 3 -L N .A .H .B . IN D EX NO . 3 4 0 FIRE RESISTANCE RATINGS POSSIBLE WITH BESTWALL FIRESTOP CONSTRUCTION PARTITIONS 16'' 0 C Load bearing except when noted "N" (N) F. R. W. S. A. W. P. 1. 24" O.C (N) 2" x 3" Wood Studs-- 24" OC (N) THICK NESS 4ft" 4ft" 5ft' 4ft' 5ft" 6 ft" 5ft' -- 5ft' 5ft" 6" 5ft" 4ft" 3ft" WEIGHT LB /SQ. FT. 52 59 60 -- 7.0 9.5 12 0 85 13 4 54 60 81 7.96 WALL SURFACE ft" Bestwail Firestop, Both sides ft" Bestwail Firestop, Both sides Vi Bestwail Firestop, Both sides, with Mineral Wool m stud space ft" Bestwail Firestop, 2 layers both sides ft' Bestwail Firestop, Both sides ft" Bestwail Firestop, 1 layer one side, 2 layers other side ft" Bestwail Firestop. 2 layers each side ft" Bestwail Firestop, over ft" sound deadening board both sides ft" Bestwail Firestop. 2 layers each side staggered studs ft" Bestwail Firestop. 1 layer nailed one side, 1 layer on resilient furring other side ft" Bestwail Firestop. 1 layer nailed one side, 1 layer on resilient furring other side plus fiber glass insulation in stud space ft" Bestwail Firestop. 2 layers one side, 1 layer on resilient furring other side Vi" Bestwail Firestop. 1 layer over Gypsum Sound Deadening Board, both sides --- ft" Bestwail Firestop. Both sides ft" Bestwail Firestop, Both sides FIRE R SISTANCE RATING 1 TEST REF. 30 Mm 45 Min 1 Hr 1 Hr EST. U L #1 BMS 92 U L #6 1 Hr Hi Hr 2 Hr 1 Hr 2 Hr U L #5 EST T 194 EST 1 Hr EST 1 Hr tb 1 MODEL BLDG CODE APPROVALS E) C A b. u. -- -- ' 1 Hr LAB UNIV OF CALIf h, b u. Load Bearing Screw Type Steel Stud: Non Load Bearing 1ft" 24" O.C 3ft" 24' O.C. 2ft" 24" 0 C 2ft" 24" OC 3ft" 24" 0 C 3ft" 24" 0 C 1ft" 24" 0 C 2y>" 24 " 0 C 2W 24" O C 2'h" 24" 0 C 3ft" 24" 0 C 4ft" 6ft" 2ft" 4ft" 4' 3ft" 5ft" 5ft" 3ft" 3ft" 5" 4ft" 4" 6ft" 6ft" 6" 65 110 54 60 4.1 -- 80 80 84 -- 104 80 7.0 104 11 0 88 ft" Bestwail Firestop, 1 layer each side ft" Bestwail Firestop, 2 layers each side ft" Bestwail Firestop, 1 layer each side ft" Bestwail Firestop, 1 layer each side ft" Bestwail Firestop over 7/16" Noise Stop Board one side, Vi" Bestwail Firestop other side, fiber glass insulation in stud space ft" Bestwail Firestop, 1 layer each side, face layer Eternawall (movable partition) ft" Bestwail Firestop, 1 layer one side, 2 layers other side ft" Bestwail Firestop, 1 layer one side, fiber glass insulation in stud space. 2 layers other side ft" Bestwail Firestop, 1 layer one side, fiber glass insulation n stud space, 1 layer ft" Bestwail Firestop over 1' core board other side ft" Bestwail Firestop, 1 layer each side ft' Bestwail Firestop. 2 layers each s<de ft" Bestwail Firestop, 2 layers each side ft" Bestwail Firestop, one layer over ft" Bestwail Gypsum Sound Deadening Board, both sides (no adhesive) ft' Bestwail Firestop. 2 layers each side. Eternawall face layer movable partition) ft" Bestwail Firestop, 2 layers each side ft" Bestwail Firestop, 2 layers one side, 1 layer over ft" fiber 1 Hr 1 Hr 1 Hr 1 Hr. !>/? Hr. 1 Hr 2 Hr 2 Hr 1 Hr 2 Hr 2 Hr l'i Hr 1 2416 T 2406 tb l. M. b. I_* ' A, B L A, b u -- A. C* A. B. C* -- ABC ` -- 3ft" 24" O C Metal Faced Non Load Bearing Steel Faced Wall Elwin G Smith & Co Inc 6ft" -- 11.1 -- ft" Bestwail Firestop. 2 layers each side, fiberglass insulation in stud space ft" Bestwail Firestop. 4 layers 2 Hr 2 Hr tb i -- (Walcon Corp ) Aluminum & Steel Unit Part (R C Mahon Co ) (R C Mahon Co ) (R C Mahon Co ) (R C Mahon Co ) Steel Faced Wall (H H. Robertson Co ) (H H Robertson Co ) (H H Robertson Co ) (H.H Robertson Co ) Semi-Solid: Gypsum Stud Non Load Bearing Solid Gypsum Board Double Solid Gypsum Board EXTERIOR WALL: S E. Gatv. Panels 2x4" Wood Studs' 16" O.C, -- __ __ -- 5ft" Norn 5ft" Nom 6V' Nom 2 ft" 4 ft ' 2 ft" 6" 4" 5" 5" 5' -- __ -- __ -- __ __ __ -- 72 79 91 95 134 13 4 __ .-- ft' Bestwail Firestop, 4 layers Vi" Bestwail Firestop. 4 layers ft" Bestwail Firestop. 2 layers each side Vi" Bestwail Firestop. 5 layers Vi" Bestwail Firestop, 2 layers each side ft" Bestwail Firestop, 4 layers Vi" Bestwail Firestop, 4 layers Vj" Bestwail Firestop, 4 layers with 1 layer ft" Bestwail Firestop Bestwail Hummer System "B" ft' Bestwail Firestop, 1 layer each side 1' x 6" Rib 24" O C ft" Bestwail Firestop over ft" Sound Deadening Board each side of 2ft" x 3' Gypsum Rib 24" O.C ft" Bestwail Firestop each side 1 " Core Board ft" Bestwail over Vi" Bestwail Firestop. each side 1' ribs ft" Bestwail Firestop. 2 layers each side 1" Rib ft" Bestwail Firestop, 2 layers each side 1" Rib ft" Bestwail Firestop. 1 layer each side IV x 6' Gypsum Rib with exterior Stran Wall (S E. Panel) Interior, ft" Bestwail Firestop Exterior Vi" gypsum sheathing and wood siding or other 2 Ht 2 Hr 2 Hr 3 Hr 2 Hr 2 Hr 3 Hr 1 Hr 1 Hr 2 Hr It, Hr 2 Hr 3 Hr 1 Hr T 3128 EST UL T 3039 -- -- -- A*-8* AHC -- -- FLOOR & CEILING Wood Joists 16" O.C. Finished floor on rough subfloor or ft -ft* Plywood Pre-Fab Floor Panels with Stringers Spaced 12" 0 C Steel Bar Joists 24" O.C. 2' Concrete Floor on Metal lath centering With 2ft" Concrete Floor -- Ceiling __ 11 4 13 0 13.0 120 160 65 34.2 32 0 33 9 34.1 36 4 38 5 39 3 38 0 -- Interior ft" Firestop, 2 layers Exterior Vi" Bestwail Gypsum Sheathing 2" x 8" T & G and 4" brick wall ft" Bestwail Firestop ft" Bestwail Firestop. 2 layers with resilient furring channel 24' O C between layers Vi" Bestwail Firestop, 1 layer, over ft*1 Sound Deadening Board ft' Bestwail Firestop nailed or screwed to metal furring 16' O C ft" Bestwail Firestop, metal furring 24' O C Vi" Bestwail Firestop, metal furring 24" O C ft" Bestwail Firestop. metal furring 24' O C ft1 Bestwail Firestop. metal furring 24' O C Vj" Bestwail Firestop, metal furring 24" O.C ft" Bestwail Firestop metal furring 24" OC ft" Bestwail Firestop "120" ceiling tile, metal grid 24' OC ft" Bestwail Firestop `'120'' ceiling tile, metal grid 24' O C 2 Hr 45 Mm 1 Hr U L if 23 III *1 U L 246 -- ABC AB 1 Hr 1 Hr 1 Hr 1', Hr l'j Hr 2 Hr 2 Hr 2 Hr 2 Hr 2 Hr U L #47 U l t2 U L fr 19 U L *17 UL * 259 UL 2237 U L =69 U L *208 T 2104 -- ABC A* C A*. B* C A*. B* C* A* B* C* ABC ABC ABC STEEL COLUMN Fire Proofing Beam Protection ft" Bestwail Firestop, 1 layer -- ft" Beslwall Firestop. 2 layers --- ft" Bestwail Firestop, 3 layers -- ft" Bestwail Firestop, 4 layers - -- ft" Bestwail Firestop 2 layers 1 Hr 2 Hr 3 Hr 4 Hr 1 Hr EST U L *8 U L * 18 U L #26 UL A B. C A, B C A B, C A. B C` Fire Hazard Classification--Official Underwriters' Tests Vi and Vi' Bestwail Firestop, 10 15 (LABELED) For all 45 nun and 1 hour ratings ft' plywood (underlayment grade, T86) over building paper, over '/2" structural interior plywood (with exterior glue gfade--CD) may be used over the wood joists with other ceilings as detailed LABEL SERVICE SYMBOL FOR Applied for Approval--1966 1 Official Underwriters' Tests have proven joint finishing rs not required for the rating in assemblies of Firestop Under "Model Building Code Approvals" A, refers to International Conference of Building Officials, B. refers to Southern Building Code Congress, C. refers to Building Officials Conference of America Additional Approvals requested 1/2" BESTWALL FIRESTOP FIRE RESISTANCE CLASSIFICATION FIRE HAZARD CLASSIFICATION Flame Spread Fuel Contributed Smoke Developed 15 HjB HU jjfl BJJJITiThJ RfflEtfcxTB! FLOOR AND CEILING Design No 2 30 Mm Design No 1 Design No 33 45 Mm 1 Hr Design No 46 1 Hr Design No 17 1 V, Hr Design No 237 2 Hr Design No Design No Design No Design No Design No Design No l 4 5 8 9 10 WAILS AND PARTITIONS 45 Mm Design No 12 2 Hr 1 Hr 2 Hr Design No 7 Design No 8 3 Hr 3 Hr 2 Hr 2 Hr 2 Hr COLUMN PHUttClIUN Design No 21 4 Hr LABEL SERVICE SYMBOL FOR 5/8" BESTWALL FIRESTOP FIRE RESISTANCE ClASSIFICATION FIRf HA7ARD CLASSIFICATION Flame Spread Fuel Contributed Smoke Developed 15 15 0 FLOOR AND CEILING Design No 69 2 Hr Design No 217 2 Hr Design No 13 P', Hr, Design No 2 1 Hr Design No 1 1 Hr Design No 259 2 Hr. COLUMN PROTECTION Design No 18 Design No 8 Design No 26 3 Hr 2 Hr 4 Hr. WALLS AND PARTITIONS Design No 5 3 Hrs Design No 7 Design No 23 2 Hrs 2 Hrs Design No 5 Design No 10 1 Hr 1 Hr GP 6701 Rev ?/67 The lobel Service lymbol of Underwriter*' loboiolonei Inc. which appear* on the twin mounting tope, binding each bundle of two piece* it the method pro vided by Underwriter*' lobo'oto'.e*. Inc, to identify gypium wollboord which ha* been produced under the label Service A.nd etpeoolly important to orchi tect* ond building inspector*, the front of each sheet i* morbed S" or I* BestwoH firestop Type X" *o thot it's easy to identify when in place SGP 0025672 BESTWALL'S IMPROVED FIRESTOP 1/2" THICK All Its 1- and 2-HOUR RATINGS plus the old 45-MINUTE on walls or ceilings for BOCA requirements PROVEN BY OFFICIAL FIRE TESTS at OHIO STATE UNIVERSITY ENGINEERING EXPERIMENT STATION and UNDERWRITERS7 LABORATORY SGP 0025673 GEORGIA-PACIFIC / gypsum oivisi N nflMMONWf ALTH RUM. OffVCS. PORTLAND, OREGON 9750^3 SGp 0025674 -UL DESIGN No. 46 1 HOUR COMBUSTIBLE Ul CO hl/> ID CO os u 0 3 0 1 I co co 6 Z Z o /> 111 o D SGP 0025675 SGP 0025676 -UL DESIGN No. 17 lVa HOURS INCOMBUSTIBLE -B X G J O tS T C f*7 E /? i/H /rs LU --J CD H => CO o uz in oc 3 O X cs K CO CS o Z Z o 1/1 LU O 3 SGP 0025677 *3 5 i? S.V ?$ 5> 35 Si* i i' t5 . > i O 0 > V1 * Q. o a a ss*" Q ^$ $$ o u b *d JM n '' *tr\\l 5> oC ro to >*CL t TO O O)0^ *o * * 0) 0 )O 0m 5^ S5^ "* k it r n a$^ 2 HOURS INCOMBUSTIBLE NON-LOAD BEARING SGP 0025678