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| Frequently
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What resources are available for wood construction in high seismic areas and why build with wood in earthquake-prone areas?
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ANSI/AF&PA Wood Frame Construction Manual (WFCM) 2001 Edition is presently referenced in model building codes such as the IBC (International Building Code) and IRC (International Residential Code). The WFCM is an ANSI approved document that provides engineered and prescriptive requirements for wood frame construction based on dead, live, snow, seismic, and wind loads derived from the 2000 International Building Code (IBC).
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- Wood has a high strength to weight ratio. Since wood is lighter than steel or concrete, there is less mass to move – a critical factor during an earthquake.
- Wood members connected with steel fasteners create a very ductile (flexible) assembly which is less prone to brittle failures often seen with unreinforced masonry or concrete structures.
- Multiple, repetitive wood members (studs, joists, and rafters at 16”-24” on-center) provide redundancy in wood assemblies making them less prone to catastrophic collapse.
- Wood’s renewability, low life-cycle environmental impacts, and ability to sequester carbon provides the optimal combination of green building and stability for earthquake-prone areas.
- Tests have proven the viability of wood frame structures under seismic loads: http://www.awc.org/NewsReleases/2009/NewsReleases2009.html#eq.
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