ASTM_C_36_-_C_36M_-_03e1.pdf

Designation:C 36/C 36M 03e1Standard Specification forGypsum Wallboard1This standard is issued under the fixed designation C 36/C 36M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon(e)indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.e1NOTEThe word rating(s)was added to the term fire resistance throughout editorially October 2004.1.Scope*1.1 This specification covers gypsum wallboard which isdesigned to be used for walls,ceilings,or partitions and affordsa surface suitable to receive decoration.NOTE1Specification C 840 contains application procedures for gyp-sum wallboard.1.2 The values stated in either inch-pound or SI(metric)units are to be regarded separately as standard.Within the text,the SI units are shown in brackets.The values stated in eachsystem shall be used independent of the other.Values from thetwo systems shall not be combined.1.3 The text of this standard references notes and footnotesthat provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall not be consideredas requirements of the standard.2.Referenced Documents2.1 ASTM Standards:2C 11 Terminology Relating to Gypsum and Related Build-ing Materials and SystemsC 473 Test Methods for Physical Testing of Gypsum PanelProductsC 645 Specification for Nonstructural Steel Framing Mem-bersC 840 Specification for Application and Finishing of Gyp-sum WallboardC 1264 Specification for Sampling,Inspection,Rejection,Certification,Packaging,Marking,Shipping,Handling,and Storage of Gypsum BoardE 84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE 96 Test Methods for Water Vapor Transmission of Mate-rialsE 119 Test Methods for Fire Tests of Building Constructionand Materials3.Terminology3.1 Definitions of terms shall be in accordance with Termi-nology C 11.4.Materials and Manufacture4.1 Gypsum wallboard shall consist of a noncombustiblecore,essentially gypsum,surfaced with paper bonded to thecore.4.2 Foil-backed gypsum wallboard shall consist of gypsumwallboard with a layer of aluminum foil laminated to the backsurface.4.3 Gypsum wallboard,type X(special fire-resistant)des-ignates gypsum wallboard complying with this specificationthat provides not less than 1-h fire resistance rating forboards58in.15.9 mm thick or34-h fire resistance rating forboards12in.12.7 mm thick,applied parallel with and oneach side of load bearing 2 3 4 wood studs spaced 16 in.406mm o.c.with 6d coated nails,178in.48 mm long,0.0915 in.2.32 mm diameter shank,14in.6.4 mm diameter heads,spaced 7 in.178 mm o.c.with wallboard joints staggered 16in.406 mm on each side of the partition and tested inaccordance with the requirements of Test Methods E 119.NOTE2Consult producers for independent test data on assemblydetails and fire resistance ratings for other types of construction.See firetest reports,or listings from recognized fire testing laboratories,forassembly particulars,materials,and ratings.4.4 Gypsum wallboard shall have a flame spread index ofnot more than 25 when tested in accordance with Test MethodE 84.5.Physical Properties5.1 Specimens shall be taken from the samples obtained inaccordance with Specification C 1264.5.2 Specimens shall be tested in accordance with TestMethods C 473.1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.Current edition approved Oct.1,2003.Published November 2003.Originallyapproved in 1921.Last previous edition approved in 2001 as C 36/C 36M 01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.NOTICE:This standard has either been superseded and replaced by a new version or withdrawn.Contact ASTM International(www.astm.org)for the latest information 5.2.1 Flexural StrengthThe specimens shall be tested faceup and face down.The average breaking load shall be not lessthan the following:Thickness,in.mmMethod AMethod BLoad,lbf NBearing EdgesAcross Fiberof SurfacingLoad,lbf NBearing EdgesParallel toFiber ofSurfacingLoad,lbf NBearing EdgesAcross Fiberof SurfacingLoad,lbf NBearing EdgesParallel toFiber ofSurfacing146.450 22220 8946 20516 715167.965 28925 11162 27621 93389.580 35630 13377 34326 1161212.7110 48940 178107 47636 1605815.9150 66750 222147 65446 2053419.0170 75660 267167 74356 2495.2.2 Humi