1、Designation: C 1177/C 1177M 08Standard Specification forGlass Mat Gypsum Substrate for Use as Sheathing1This standard is issued under the fixed designation C 1177/C 1177M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of
2、 last revision. A number in parentheses indicates the year of lastreapproval. 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 substrate for aweat
3、her barrier.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem may not be exact equivalents; therefore, each systemshall be used independently of the other. Combini
4、ng valuesfrom the two systems may result in non-conformance with thestandard.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. Refer
5、enced Documents2.1 ASTM Standards:2C11 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 1264 Specification for Sampling, Inspection, Rejection,Certifi
6、cation, Packaging, Marking, Shipping, Handling,and Storage of Gypsum Panel ProductsE119 Test Methods for Fire Tests of Building Constructionand Materials3. Terminology3.1 Definitions shall be in accordance with TerminologyC11.3.2 Definitions of Terms Specific to This Standard:3.2.1 glass mat, na mat
7、 of glass fibers with or without abinder.3.2.2 edge, nthe bound edge as manufactured.3.2.3 weather barrier, na material that prevents the pas-sage of rain, sleet and snow.4. Materials and Manufacture4.1 Glass Mat Gypsum Substrate shall consist of a noncom-bustible water-resistant core, essentially g
8、ypsum, surfaced withglass mat partially, or completely embedded in the core.4.2 Glass Mat Gypsum Substrate, type X (special fire-resistant) designates glass mat gypsum substrate complyingwith this specification that provide not less than 1-h fireresistance rating for substrate58 in. 15.9 mm thick or
9、34-hfire resistance rating for substrate12 in. 12.7 mm thick,applied parallel with and on each side of load bearing 2 by 4wood studs spaced 16 in. 406 mm on center with 6d coatednails, 178 in. 48 mm long, 0.0915 in. 2.3 mm diametershank,14 in. 6.4 mm diameter heads, spaced 7 in. 178 mmon center with
10、 glass mat gypsum substrate joints staggered 16in. 406 mm on each side of the partition and tested inaccordance with Test Methods E119.NOTE 1Consult manufacturers for independent test data on assemblydetails and fire resistance ratings for other types of construction. See firetest reports or listing
11、s from recognized fire testing laboratories forassembly particulars, materials, and ratings.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 MethodsC 473.5.2.1 Flexural StrengthThe spe
12、cimens shall be tested faceup and face down. The average breaking load shall not be lessthan the 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 44
13、5 80 35658 15.9 140 623 100 4451This 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 Sept. 15, 2008
14、. Published October 2008. Originallyapproved in 1991. Last previous edition approved in 2006 as C 1177/C 1177M06.2For 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
15、 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.5.2.2 Humidified DeflectionSpecimens shall have an av-erage deflect
16、ion 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 havean average hardness of not less than 15 lbf 67 N when testedin accordance with Method B:5.2.4 Nail Pu
17、ll ResistanceSpecimens shall have an aver-age nail pull resistance of not less than the following whentested in accordance 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 Water ResistanceThe three specimens selected shallhave an a
18、verage 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 inaccordance with Specification C 1264.6.2 Thickness, width, length and end squareness shall bedetermined in accordance with Test Methods C 473
19、.6.2.1 ThicknessThe nominal thickness shall be14 ,716 ,12 ,or58 in. 6.4, 11.1, 12.7 or 15.9 mm, with tolerances inthe nominal thickness of 6132 in. 6 0.8 mm, and with localvariations of 6116 in. 6 1.6 mm from the nominal thick-ness.6.2.2 WidthThe nominal width shall be up to 48 in. 1220mm, with tole
20、rance of18 in. 3 mm under the specifiedwidth.6.2.3 LengthThe tolerance in length shall be 614 in.6 6 mm6.2.4 End SquarenessCorners shall be square with atolerance of 618 in. 6 3 mm in the full width of thesubstrate.6.3 Edges and EndsThe edges and ends shall be straightand either square, beveled, fea
21、tured, tapered, or featured andtapered.7. Finish and Appearance7.1 Glass mat gypsum substrate shall be free of any cracksand imperfections that would render it unfit for its designeduse.8. Sampling, Inspection, Rejection, Certification,Packaging, Marking, Shipping, Handling, and Storage8.1 Shall be
22、in accordance with Specification C 1264.9. Keywords9.1 core; exterior substrate; fire-resistant classification; flex-ural strength; glass mat; glass mat gypsum substrate; gypsum;hardness; humidified deflection; nail pull resistance; noncom-bustible; sheathing; substrate; type X; water resistance;wea
23、ther barrierAPPENDIX(Nonmandatory Information)This Appendix gives general information and also suggestions for inclusions to be made elsewhere by the specifier. They arenot part of this specification.The definitions of type X as given in 4.2 and the alternate definition given in this appendix, are i
24、ntended only as a test todefine glass mat gypsum substrate for use as sheathing as meeting the requirements of type X. These tests do not indicate apreferred application nor do they limit the use of the product in other fire related assemblies.All gypsum panel products for which type X is defined, e
25、xcept gypsum lath and gypsum shaftliner board, use the same testfor type X products, therefore the type X designation indicates a consistent level of fire resistance.X1. ALTERNATE DEFINITION FOR TYPE XX1.1 Glass mat gypsum substrate, type X (special fire-resistant) designates glass mat gypsum substr
26、ate providing agreater fire resistance than regular glass mat gypsum substrateof the same thickness. Type X (special fire-resistant) glass matgypsum substrate, when tested in accordance with Test Meth-ods E119, shall provide the following minimum fire resistanceratings for the assemblies described:X
27、1.1.1 One hour for a58 in. 15.9 mm thickness applied toa partition in a single layer application on each side of 358 in.92 mm deep non-loadbearing galvanized steel studs comply-ing with Specification C 645 spaced 24 in. 610 mm on center.The58 in. 15.9 mm thick glass mat gypsum substrate 48 in.1220 m
28、m wide shall be attached using 1 in. 25 mm longdrywall screws spaced 8 in. 203 mm on center along theedges and ends, and 12 in. 305 mm along intermediate studs.All joints shall be oriented parallel to and located over studsand staggered on opposite sides of the assembly; andC 1177/C 1177M 082X1.1.2
29、Two hours for a12 in. 12.7 mm thickness appliedto a partition in a double layer application on each side of 212in. 64 mm deep non-loadbearing galvanized steel studscomplying with Specification C 645 spaced 24 in. 610 mm oncenter. The base layer 48 in. 1220 mm wide shall be attachedusing 1 in. 25 mm
30、long drywall screws spaced 12 in. 305mm on center along substrate edges, ends and along interme-diate studs. Joints shall be oriented parallel to and located overstuds and staggered on opposite sides of the assembly. The facelayer 48 in. 1220 mm wide shall be attached using 158 in. 41mm long drywall
31、 screws spaced 12 in. 305 mm alongsubstrate edges, ends and along intermediate studs. Joints shallbe oriented parallel to and located over studs, offset 24 in. 610mm from the base layer joints, and staggered on opposite sidesof the assembly.SUMMARY OF CHANGESCommittee C11 has identified the location
32、 of selected changes to this specification since the last issue,C 1177/C 1177M 06, that may impact the use of this specification. (Approved September 15, 2008)(1) Revised 6.2.3.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item ment
33、ionedin this standard. Users 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
34、and must be reviewed every five 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
35、 of theresponsible technical 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 B
36、ox C700, West Conshohocken, PA 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).C 1177/C 1177M 083
