ABSTRACT

Earthquake Strengthening of Cripple Walls in Wood-Frame Dwellings, South Napa Recovery Advisory   [open pdf - 2MB]

"The August 24, 2014 South Napa earthquake has reinforced past observations that wood-frame dwellings with flexible wood foundation walls (known as cripple walls) and inadequate anchorage (bolting) to the foundation are vulnerable to damage from earthquake shaking (Figure 1). Damage due to vulnerable cripple walls, particularly taller cripple walls, can be significant and costly to repair. In addition, homes with cripple wall damage are usually identified as unsafe to occupy (i.e., 'red tagged'). As a result, occupants will be displaced and unable to live in their home until repairs can be performed, adding living expenses to the cost of repairing earthquake damage."

Report Number:
FEMA DR-4193-RA2
Publisher:
Date:
2015-04
Copyright:
Public Domain
Retrieved From:
Federal Emergency Management Agency: http://www.fema.gov/
Format:
pdf
Media Type:
application/pdf
URL:
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