Standard Specification for
the Manufacture, Performance, and Testing of Metal
Suspension Systems for Acoustical Tile and Lay-in Panel
Ceilings1

This standard is issued under the fixed designation C 635; 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

Click below to download Astm C 635 – 00 Pdf free

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Click here to download Astm C 634 – 02 Pdf Free Download