1、Designation: C1177/C1177M 13C1177/C1177M 17Standard Specification forGlass Mat Gypsum Substrate for Use as Sheathing1This standard is issued under the fixed designation C1177/C1177M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision,
2、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 glass mat gypsum substrate, which is designed to be used as an exterior substra
3、te for a weatherbarrier.1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI unitsare shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be usedindependently of the
4、other. Combining values from the two systems may result in non-conformance with the standard.1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be considered as requirements of the
5、 standard.1.4 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barr
6、iers to Trade (TBT) Committee.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 ProductsC645 Specification for Nonstructural Steel Framing MembersC
7、1264 Specification for Sampling, Inspection, Rejection, Certification, Packaging, Marking, Shipping, Handling, and Storage ofGypsum Panel ProductsD3273 Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental ChamberE119 Test Methods for Fire Tests of Buil
8、ding Construction and Materials3. Terminology3.1 Definitions 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 weather barrier, na material
9、that prevents the passage of rain, sleet and snow.4. Materials and Manufacture4.1 Glass Mat Gypsum Substrate shall consist of a noncombustible water-resistant core, essentially gypsum complying withSpecification C22, surfaced with glass mat partially, or completely embedded in the core.4.2 Glass Mat
10、 Gypsum Substrate, type X (special fire-resistant) designates glass mat gypsum substrate complying with thisspecification that provide not less than 1-h fire resistance rating for substrate 58 in. 15.9 mm thick or 34-h fire resistance ratingfor substrate 12 in. 12.7 mm thick, applied parallel with a
11、nd on each side of load bearing 2 by 4 wood studs spaced 16 in. 4061 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.C
12、urrent edition approved Oct. 1, 2013Dec. 1, 2017. Published October 2013December 2017. Originally approved in 1991. Last previous edition approved in 20082013as C1177/C1177MC1177/C1177M 13.08. DOI: 10.1520/C1177_C1177M-13.10.1520/C1177_C1177M-17.2 For referencedASTM standards, visit theASTM website,
13、 www.astm.org, or contactASTM 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
14、 what changes have been made 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
15、 the official document.*A Summary 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 States1mm on center with 6d coated nails, 1 78 in. 48 mm long, 0.0915 in. 2.3 mm diameter shank, 14 in. 6
16、.4 mm diameter heads,spaced 7 in. 178 mm on center with glass mat gypsum substrate joints staggered 16 in. 16 in. 406 mm on each side of thepartition and tested in accordance with Test Methods E119.NOTE 1Consult manufacturers for independent test data on assembly details and fire resistance ratings
17、for other types of construction. See fire testreports or listings from recognized fire testing laboratories for assembly particulars, materials, and ratings.4.3 Glass mat gypsum substrate, mold resistant, designates gypsum panels having not more than 20 % mold growth, based onsurface area coverage,
18、when tested in accordance with Test Method D3273.5. 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 Methods C473.5.2.1 Flexural StrengthThe specimens shall be tested face up and face dow
19、n. The average breaking load shall not be less thanthe following:Method BThickness,in. mmLoad, lbf N Bearingedges perpendicular tothe substrate edgeLoad, lbf N Bearing edgesparallel to the substrateedge14 6.4 50 222 40 178716 11.1 88 394 70 31412 12.7 100 445 80 35658 15.9 140 623 100 4455.2.2 Humid
20、ified DeflectionSpecimens shall have an average deflection of not more than the following:Thickness,in. mmHumidified deflection,eighths of an in. mm14 6.4 not required716 11.1 3 912 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 6
21、7 N when tested inaccordance 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. mmNail pull resistance,lbf N14 6.4 40 178716 11.1 70 31412 12.7 80 35658 15.9 90 4005.2.5 Wate
22、r ResistanceThe three specimens selected shall have an average water absorption of not more than 10 weight %after a 2-h immersion.6. Dimensions and Tolerances6.1 Specimens shall be taken from the samples obtained in accordance with Specification C1264.6.2 Thickness, width, length and end squareness
23、shall be determined in accordance with Test Methods C473.6.2.1 ThicknessThe nominal thickness shall be 14, 716,12, or 58 in. 6.4, 11.1, 12.7 or 15.9 mm, with tolerances in the nominal thickness of 6132 in. 6 0.860.8 mm, and with localvariations of 66116 in. 6 1.661.6 mm from the nominal thickness.6.
24、2.2 WidthThe nominal width shall be up to 48 in. 1220 mm, 1220 mm, with tolerance of 18 in. 3 mm under thespecified width.6.2.3 LengthThe tolerance in length shall be 6614 in. 6 666 mm6.2.4 End SquarenessCorners shall be square with a tolerance of 6618 in. 6 363 mm in the full width of the substrate
25、.6.3 Edges and EndsThe edges and ends shall be straight and either square, beveled, featured, tapered, or featured and tapered.7. Finish and Appearance7.1 Glass mat gypsum substrate shall be free of any cracks and imperfections that would render it unfit for its designed use.8. Sampling, Inspection,
26、 Rejection, Certification, Packaging, Marking, Shipping, Handling, and Storage8.1 Shall be in accordance with Specification C1264.C1177/C1177M 1729. Keywords9.1 core; exterior substrate; fire-resistant classification; flexural strength; glass mat; glass mat gypsum substrate; gypsum;hardness; humidif
27、ied deflection; nail pull resistance; noncombustible; sheathing; substrate; type X; water resistance; weatherbarrierAPPENDIX(Nonmandatory Information)This Appendix gives general information and also suggestions for inclusions to be made elsewhere by the specifier. They are not part of this specifica
28、tion.The definitions of type X as given in 4.2 and the alternate definition given in this appendix, are intended only as a test to define glass mat gypsum substrate for useas sheathing as meeting the requirements of type X. These tests do not indicate a preferred application nor do they limit the us
29、e of the product in other fire relatedassemblies.All gypsum panel products for which type X is defined, except gypsum lath and gypsum shaftliner board, use the same test for type X products, therefore the type Xdesignation indicates a consistent level of fire resistance.X1. ALTERNATE DEFINITION FOR
30、TYPE XX1.1 Glass mat gypsum substrate, type X (special fire-resistant) designates glass mat gypsum substrate providing a greater fireresistance than regular glass mat gypsum substrate of the same thickness. Type X (special fire-resistant) glass mat gypsumsubstrate, when tested in accordance with Tes
31、t Methods E119, shall provide the following minimum fire resistance ratings for theassemblies described:X1.1.1 One hour for a 58 in. 15.9 mm thickness applied to a partition in a single layer application on each side of 358 in. 92mm deep non-loadbearing galvanized steel studs complying with Specific
32、ation C645 spaced 24 in. 610 mm on center. The 58 in.15.9 mm thick glass mat gypsum substrate 48 in. 1220 mm wide shall be attached using 1 in. 25 mm long drywall screwsspaced 8 in. 203 mm on center along the edges and ends, and 12 in. 305 mm along intermediate studs. All joints shall beoriented par
33、allel 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 double layer application on each side of 212 in. 64mm deep non-loadbearing galvanized steel studs complying with Specification C645 spaced 2
34、4 in. 610 mm on center. The baselayer 48 in. 1220 mm wide shall be attached using 1 in. 25 mm long drywall screws spaced 12 in. 305 mm on center alongsubstrate edges, ends and along intermediate studs. Joints shall be oriented parallel to and located over studs and staggered onopposite sides of the
35、assembly. The face layer 48 in. 1220 mm wide shall be attached using 158 in. 41 mm long drywall screwsspaced 12 in. 305 mm along substrate edges, ends and along intermediate studs. Joints shall be oriented parallel to and locatedover studs, offset 24 in. 610 mm from the base layer joints, and stagge
36、red on opposite sides of the assembly.SUMMARY OF CHANGESCommittee C11 has identified the location of selected changes to this specificationstandard since the last issue,issue (C1177/C1177M 08C1177/C1177M 13,) that may impact the use of this specification.standard.(Approved Oct. 1, 2013Dec. 1, 2017)
37、.)(1) RevisedAdded 2.1 and 4.3.4.1.C1177/C1177M 173ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent righ
38、ts, 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 five years andif not revised, either reapproved or withdrawn.Your comments are invited either for r
39、evision 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 committee, which you may attend. If you feel that your comments have not received a fair hearing y
40、ou 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, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may b
41、e 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 174
