1、Designation:C 1395/C 1395M 04e1Specification forGypsum Ceiling Board1This standard is issued under the fixed designation C 1395/C 1395M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses
2、 indicates the year of lastreapproval.A superscript epsilon(e)indicates an editorial change since the last revision or reapproval.e1NOTEThe word rating(s)was added to the term fire resistance throughout editorially October 2004.1.Scope*1.1 This specification covers12in.12.7 mm thick gypsumceiling bo
3、ard designed for use on interior ceilings with framingspaced not more than 24 in.610 mm on center and thataffords a surface suitable to receive waterbased texture andother decoration.This product is also suitable for use oninterior walls.NOTE1Specification C 840 contains application procedures for g
4、yp-sum ceiling board.1.2 The values stated in either inchpound units or SI(metric)are to be regarded separately as standard.Within thetext,the SI units are shown in brackets.The values stated ineach system shall be used independent of the other.Valuesfrom the two systems shall not be combined.2.Refe
5、renced 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 B
6、oardC 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 119 Test Methods for Fire Tests of Building Constructionand Materials3.Terminology3.1 Def
7、initions used in this specification shall be in accor-dance with Terminology C 11.4.Materials and Manufacture4.1 Gypsum ceiling board shall consist of a noncombustiblecore,essentially gypsum,surfaced with paper bonded to thecore.4.2 Gypsum ceiling board,type X(special fire-resistant),designates gyps
8、um ceiling board complying with this specifi-cation that provides not less than34-h fire resistance rating forboards applied parallel with and on each side of load bearing 23 4 wood studs spaced 16 in.406 mm on centers with 6dcoated nails,178in.48 mm long,0.0915 in.2.3 mmdiameter shank,14in.6.4 mm d
9、iameter heads,spaced 7 in.178 mm on centers with gypsum board joints staggered 16 in.406 mm on each side of the partition and tested in accordancewith Test Methods E 119.NOTE2Consult producers for independent test data on assemblydetails and fire resistance ratings for other types of construction.Se
10、e firetest reports or listings from recognized fire testing laboratories forassembly particulars,materials,and ratings.4.3 Gypsum ceiling board 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
11、 samples obtained inaccordance with Specification C 1264.5.1.1 Specimens shall be tested in accordance with TestMethods C 473.5.1.2 Flexural StrengthThe specimens shall be tested faceup and face down.The average breaking load shall be not lessthan that given in Table 1.5.1.3 Humidified DeflectionThe
12、 specimens shall have anaverage deflection of not more than516in.8 mm.1This test method is under the jurisdiction of ASTM C11 on Gypsum andRelated Building Materials and Systems and is the direct responsibility ofSubcommittee C11.01 on Specifications and Test Methods for Gypsum Products.Current edit
13、ion approved Jan.1,2004.Published January 2004.Originallyapproved in 1998.Last previous edition approved in 2001 as C 1395/C 1395M-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 informat
14、ion,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 repl
15、aced by a new version or withdrawn.Contact ASTM International(www.astm.org)for the latest information 5.1.4 Core,End,and Edge HardnessThe specimens shallhave an average hardness of not less than 15 lbf 67 N whentested by Method A and 11 lbf 49 N when tested by MethodB.5.1.5 Nail Pull ResistanceThe s
16、pecimens shall have anaverage nail-pull resistance of not less 80 lbf 356 N whentested by Method A and 77 lbf 343 N when tested by MethodB.6.Dimensions and Tolerances6.1 Specimens shall be taken from the samples obtained inaccordance with Specification C 1264.6.2 Thickness,width,length,and end squareness shall bedetermined in accordance with Test Methods C 473.6.2.1 ThicknessThe nominal thickness shall be12in.12.7 mm with tolerances in the nominal thickness of 6164in.0.4 mm with local variations