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American Wood Council
TR 10 - Calculating the Fire Resistance of Exposed Wood Members

66 pages (2 MB PDF)

The superior fire performance of timbers can be attributed to the charring effect of wood. As wood members are exposed to fire and the wood begins to burn, a char layer is formed. The char layer acts as an insulator and protects the core of the wood section. Thus, wood members can be designed so that a sufficient cross section of wood remains to sustain the design loads for the required duration of fire exposure. A standard fire exposure is used to calculate the fire resistance. Revised in 2015 to include design provisions and fire test data for unprotected Structural Composite Lumber and unprotected Cross-Laminated Timber in accordance with the 2015 NDS.

 
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