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    Engineered wood products, such as oriented strandboard, laminated veneer lumber, and other composite wood products, are being used more often in construction. This includes use as rim boards, which are the components around the perimeter of a floor assembly. This situation has increased the need for information about the fire resistance of these products. In this study, we evaluated different engineered wood products for fire resistance using both the ASTM E119 standard for fire exposure and a modified time-temperature curve. We looked at unprotected, gypsum-board-protected, and double gypsum-board-protected rim boards. Using the data from this study, we evaluated possible construction options for achieving certain levels of fire resistance of engineered wood products in use as rim boards. We also developed a simple analysis method for evaluating the protection provided by the rim board.

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    White, Robert H. 2003. Fire resistance of engineered wood rim board products. Res. Pap. FPL-610. Madison, WI : U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 2003. 22 pages.


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    Fire resistance, rim boards, composite wood products.

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