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What do you have to do to forfill the guidelines to meet a two hour firewall rating at the ceiling?
what does a two hour firewall look like at the top. The drywall meets a metal roof with flutes. does anyone have a ul listing for the wall?
Two layers of 1/2 inch fire rated sheet rock.
Joints should be staggered.
The first layer has to be taped and mudded before installing the second layer.
Association of the Wall and Ceiling Industry
http://www.awci.org/
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