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Designation: C 37/C 37M – 99 - Gypsum Lath1

This standard is issued under the fixed designation C 37/C 37M; the number immediately following the designation indicates the year of 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. | ij Designation C 37 C 37M - 99 Standard Specification for Gypsum Lath1 This standard is issued under the fixed ds ii r atic n c 37 C 37IXM the number immediately following the designation indicates the year of original adoption or in the case of revision the year of last revision. A number in parentheses indicates the year of last rerpprovrl. 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. 1. Scope 1.1 This specification covers plain and ioil-backcd typd of gypsum lath which is designed to be used as a base for application of gypsum plaster see Specifica on c 28 . 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 each system shall be used independent of the other. Values from the two systems shall not be combined. 1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes excluding those in tables and fgures shall not be considered as requirements of the standard. 2. Referenced Documents 2.1 ASTM Standards C 11 Terminology Relating to Gypsum and Related Building Materials and Systems2 C 28 Specification for Gypsum Plasscrs2 C 473 Test Methods for Physical Testing of Gypsum Panel Products2 C 1264 Specifica on for Siampiin - Inspection. 1 100000. Certlfcaiion. Packaging. Marking. Shipping. Handlmg and Storage of Gypsum Board2 E 96 Test Methods for Water Vapor Transmission of Materials3 E 119 Test Methods for Fire Tests of Building Construction and Materials4 3. Terminology 3.1 Defimtions of terms sludl be in accordance wiiti Tenm-nology C 11. 4. Materials and Manufacture 4.1 Plain gypsum lath shall consist of a noncombustible 1 This specification is undef the jurisdiction of ASTM Committee C-ll on Gypsum and Related Building Materials and Systems and is