Earthquake Strengthening of Cripple Walls in Wood-Frame Dwellings (FEMA P-1024-RA2)

This FEMA Recovery Advisory provides guidance on strengthening cripple walls in wood-frame dwellings, emphasizing vulnerabilities exposed by the 2014 South Napa Earthquake. It details mitigation measures such as plywood bracing and anchor bolts to address flexible wood foundation walls and inadequate anchorage. The advisory includes the FEMA Plan Set with pre-engineered retrofit solutions to improve the attachment between homes and their foundation systems. The resource is intended for use in post-earthquake recovery and seismic retrofitting of residential wood-frame buildings.