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Fire Tests Show Similar Results for Plywood and OSB.

Plywood and oriented strandboard (OSB) roof sheathing burned at essentially the same rates under fire tests conducted recently by the Phoenix Fire Department in cooperation with the National Institute of Standards and Technology (NIST). The tests were designed to help determine how long firefighters might safely remain on the roofs of burning structures built with different materials. Four small wood structures representing slightly different types of Southwest construction were used as test samples. Two were built with OSB roof sheathing and two with plywood sheathing. The roofs also varied by finish roofing: two used tile and two used asphalt shingles. All four structures used wood roof trusses. The elapsed time prior to the "dummy" firefighters falling through the roofs ranged from just over 16 minutes to about 17-1/2 minutes. The results suggested no clear difference in the performance between the plywood and OSB assemblies.
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Publication:Forest Products Journal
Article Type:Brief Article
Geographic Code:1USA
Date:Feb 1, 2001
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