1、Designation: C1178/C1178M 11C1178/C1178M 13Standard Specification forCoated Glass Mat Water-Resistant Gypsum Backing Panel1This standard is issued under the fixed designation C1178/C1178M; the number immediately following the designation indicates the yearof original adoption or, in the case of revi
2、sion, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers coated glass mat water-resistant gypsum backing panel designed for use on
3、 ceilings and walls inbath and shower areas as a base for the application of ceramic or plastic tile.1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be u
4、sed independently of the other. Combining values from thetwo systems may result in non-conformance with the standard. Within the text, the SI units are shown in brackets.1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes(excludin
5、g those in tables and figures) shall not be considered as requirements of the standard.2. Referenced Documents2.1 ASTM Standards:2C11 Terminology Relating to Gypsum and Related Building Materials and SystemsC22 Specification for GypsumC473 Test Methods for Physical Testing of Gypsum Panel ProductsC6
6、45 Specification for Nonstructural Steel Framing MembersC1264 Specification for Sampling, Inspection, Rejection, Certification, Packaging, Marking, Shipping, Handling, and Storage ofGypsum Panel ProductsE119 Test Methods for Fire Tests of Building Construction and Materials3. Terminology3.1 Definiti
7、ons shall be in accordance with Terminology C11.3.2 Definitions of Terms Specific to This Standard:3.2.1 glass mat, na mat of glass fibers with or without a binder.3.2.2 edge, nthe bound edge as manufactured.3.2.3 face, nthe coated surface.3.2.4 nominal thickness, nthe manufacturer-stated fractional
8、 value of thickness of the gypsum panel product expressed indecimal value to the nearest one-thousandth (0.001) of an inch.4. Materials and Manufacture4.1 Coated glass mat water-resistant gypsum backing panel shall consist of a noncombustible water-resistant core, essentiallygypsum, gypsum complying
9、 with Specification C22, surfaced with glass mat, partially or completely embedded in the core, andwith a water-resistant coating on one surface.4.2 Coated glass mat water-resistant gypsum panels, type X (special fire-resistant) designates glass mat gypsum panelscomplying with this specification tha
10、t provide not less than 1-h fire resistance rating for boards 58 in. 15.9 mm thick or 34-h fireresistance rating for panels 12 in. 12.7 mm thick, applied parallel with and on each side of load bearing 2 by 4 wood studs spaced16 in. 406 mm on center with 6d coated nails, 1 78 in. 48-mm long, 0.0915 i
11、n. 2.3 mm diameter shank, 14 in. 6.4 mm1 This specification is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsibility ofSubcommittee C11.01 on Specifications and Test Methods for Gypsum Products.Current edition approved Oct.
12、 1, 2011Oct. 1, 2013. Published November 2011October 2013. Originally approved in 1991. Last previous edition approved in 20082011as C1178/C1178MC1178/C1178M 08.11. DOI: 10.1520/C1178_C1178M-11.10.1520/C1178_C1178M-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactAST
13、M Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made
14、 to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Su
15、mmary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1diameter heads, spaced 7 in. 178 mm on center with glass mat gypsum panel joints staggered 16 in. 406 mm on each side ofthe pa
16、rtition and tested in accordance with Test Methods E119.NOTE 1Consult manufacturers for independent test data on assembly details and fire resistance ratings for other types of construction. See fire testreports or listings from recognized fire testing laboratories for assembly particulars, material
17、s, and ratings.5. Physical Properties5.1 Specimens shall be taken from the samples obtained in accordance with Specification C1264.5.2 Specimens shall be tested in accordance with Test Methods C473.C1178/C1178M 1325.2.1 Flexural StrengthThe specimens shall be tested face up and face down. The averag
18、e breaking load shall not be less thanthe following:Method BLoad, lbf NThickness,in. mmBearing edges perpendicularto the board edgeBearing edges parallelto the board edge14 6.4 50 222 40 178516 7.9 65 289 50 22212 12.7 100 445 80 35658 15.9 140 623 100 4455.2.2 Humidified DeflectionSpecimens shall h
19、ave an average deflection of not more than the following:Thickness,in. mmHumidified deflection,eighths of an in. mm14 6.4 not required516 7.9 not required12 12.7 2 658 15.9 1 35.2.3 Core, End and Edge HardnessSpecimens shall have an average hardness of not less than 15 lbf 67 N when tested inaccorda
20、nce with Method B.5.2.4 Nail Pull ResistanceSpecimens shall have an average nail pull resistance of not less than the following when tested inaccordance with Method B:Thickness, in. mm Nail pull resistance, lbf N14 6.4 40 178516 7.9 50 22212 12.7 70 31158 15.9 90 4005.2.5 Water ResistanceThe three s
21、pecimens selected shall have an average water absorption of not more than 5 weight % after2-h immersion.5.2.6 Surface Water AbsorptionSpecimens shall have an average surface water absorption of the face side of the panel notmore than 0.5 g after 2 h of elapsed time.6. Dimensions and Tolerances6.1 Sp
22、ecimens shall be taken from the samples obtained in accordance with Specification C1264.6.2 Thickness, width, and length shall be determined in accordance with Test Methods C473.6.2.1 ThicknessThe thickness shall be 14 in., 516 in., 12 in. or 58 in. 6.4, 7.9, 12.7 or 15.9 mm, with tolerances of 6 0.
23、015in. 6 0.40 mm and with local variations of 6 0.030 in. 6 0.80 mm.6.2.2 WidthThe nominal width shall be up to 48 in. 1220 mm, with a tolerance of 332 in. 3 mm under the specified width.6.2.3 LengthThe tolerance in length shall be 6 14 in. 6 6 mm6.2.4 End SquarenessCorners shall be square with a to
24、lerance of 6 14 in. 66 mm in the full width of the panel.6.3 Edges and EndsThe edges and ends shall be straight and either square or tapered.7. Finish and Appearance7.1 Coated glass mat water-resistant gypsum backing panel shall have surfaces true and free of imperfections that render thepanel unfit
25、 for its designed use.8. Sampling, Inspection, Rejection, Certification, Packaging, Marking, Shipping, Handling, and Storage8.1 Shall be in accordance with Specification C1264.9. Keywords9.1 bath; ceilings; ceramic or plastic tile; construction; core; end and edge hardness; fire-resistant; flexural
26、strength; glass mat;gypsum; humidified deflection; immersion; nail pull resistance; shower; surface water absorption; type X; walls; water absorption;water resistance; water-resistantC1178/C1178M 133APPENDIX(Nonmandatory Information)X1. ALTERNATE DEFINITION FOR TYPE XThis Appendix gives general info
27、rmation and also suggestions for inclusions to be made elsewhere by the specifier. They are notpart of this specification.The definition of type X in 4.2 and the alternate definition given in this appendix are intended only as a test to define the coatedglass mat water-resistant gypsum backing panel
28、s as meeting the requirements of type X. These tests do not indicate a preferredapplication nor do they limit the use of the product in other fire rated assemblies.All gypsum panel products for which type X is defined, except gypsum lath and gypsum shaftliner board, use the same test fortype X produ
29、cts, therefore the type X definition indicates a consistent level of fire resistance.X1.1 Coated glass mat water-resistant gypsum panels, type X (special fire-resistant) designates glass mat gypsum panels providinga greater fire resistance than regular glass mat water-resistant gypsum panels of the
30、same thickness. Type X (special fire-resistant)glass mat water-resistant gypsum panels, when tested in accordance with Test Methods E119, shall provide the following minimumfire resistance ratings for the assemblies described:X1.1.1 One hour for a 58 in. 15.9 mm thickness applied to a partition in a
31、 single layer application on each side of 3 58 in. 92mm deep non-load bearing galvanized steel studs complying with Specification C645 spaced 24 in. 610 mm on center. The 58in. 15.9 mm thick glass mat water-resistant gypsum panels 48 in. 1220 mm wide shall be attached using 1 in. 25 mm longdrywall s
32、crews spaced 8 in. 203 mm on center along the edges and ends, and 12 in. 305 mm along intermediate studs.All jointsshall be oriented parallel to and located over studs and staggered on opposite sides of the assembly; andX1.1.2 Two hours for a 12 in. 12.7 mm thickness applied to a partition in a doub
33、le layer application on each side of 2 12 in.64 mm deep non-load bearing galvanized steel studs complying with Specification C645 spaced 24 in. 610 mm on center. Thebase layer 48 in. 1220 mm wide shall be attached using 1 in. 25 mm long drywall screws spaced 12 in. 305 mm on centeralong panel edges,
34、 ends and along intermediate studs. Joints shall be oriented parallel to and located over studs and staggered onopposite sides of the assembly. The face layer 48 in. 1220 mm wide shall be attached using 1 58 in. 41 mm long drywall screwsspaced 12 in. 305 mm along panel edges, ends and along intermed
35、iate studs. Joints shall be oriented parallel to and located overstuds, offset 24 in. 610 mm from the base layer joints, and staggered on opposite sides of the assembly.SUMMARY OF CHANGESCommittee C11 has identified the location of selected changes to this specification since the last issue,C1178/C1
36、178M 08,C1178/C1178M 11, that may impact the use of this specification. (Approved Oct. 1,2013October 1, 2011)(1) Added dimension of 516 in. to the physical properties and dimensions and tolerances.(1) Revised 2.1 and 4.1.Committee C11 has identified the location of selected changes to this specifica
37、tion since the last issue,C1178/C1178M 06, that may impact the use of this specification. (Approved August 1, 2008)(1) Revised 6.2.3.C1178/C1178M 134ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users
38、 of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every f
39、ive years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical
40、committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, P
41、A 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).C1178/C1178M 135
