DCA3: Designing fire-rated I-joist assemblies
Construction Specifier
JUNE 30, 2021
The wood I-joist (WIJ) assemblies were added to DCA3 in 2001 and were intended to promote the usage of engineered lumber by simplifying the associated design, specification, and permitting processes. Achieving this level of performance with cavity insulation generally entails insulating the entire depth of 302 mm (11.875 in.)
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