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Designation: C 318/C 318M – 00 - Gypsum Formboard1

This standard is issued under the fixed designation C 318/C 318M; 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. | ij Designation C 318 C 318M - 00 Standard Specification for Gypsum FOrmboard1 This standard is issued under the fixed designation c 318 C 318M 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. 1. Scope 1.1 This speciflcation covers the mumum requirements for gypsum formboard designed for use as a permanent form for poured-in-place reinforced gypsum concrete roof decks. 1.2 The values stated in either inch-pound units or SI metric 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 which provide explanatory material. These notes shall not be considered requirements of the standard. 2. Referenced Documents 2.1 ASTM Standards C 11 Terminology Relating to Gypsum and Related Building Materials and Systems2 C 473 Test Methods for Physical Testing of Gypsum Board Products and Gypsum Lath2 C 1264 Speciflcation for SampHng. Inspection. Reiection Certification Packaging. Mmking Slhpping Handllng and Storage of Gypsum Board2 G21 Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi3 3. Terminology 3.1 Definitions Definitions of terms used in this standard shall be in accordance with Terminology C 11. 4. Materials and Manufacture 4.1 Gypsum formboard shall consist of a noncombustible core essentially gypsum containing not more than 15 by weight of fber either mineral or organic synthetic or natural. 4.2 The face surface shall be specify call treated to rceìst fungus growth. 5. Physical Properties 5.1 Specimens shall be tested in accordance with Test Methods C 473. 1 This specifcation is under the .