In many a floor/ceiling and roof/ceiling assembly listed in UL’s Fire Resistance Directory, a ceiling membrane is required to thermally protect the structural members of the assembly in the event of a ...
SCHOFIELD, Wis. — Greenheck’s new ceiling radiation damper model CRD-320WT, combined with select models of Greenheck ceiling exhaust bathroom fans, adds even more code-compliant options for wood truss ...
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