Guidance and Recommendations for the Seismic Evaluation and Retrofit of Multi-Unit Wood-Frame Buildings with Weak First Stories (FEMA P-807-1)

The resource provides guidance and recommendations for the seismic evaluation and retrofit of multi-unit wood-frame buildings with weak first stories. It includes comprehensive information on the seismic retrofitting process, including the seismic evaluation criteria, retrofit design examples with special cantilever columns, wood-structural-panel shear walls, lateral-torsional bracing for steel moment frames, and implications for short-side-open buildings. Technical details such as collector design, steel moment frame modeling, base fixity considerations, and retrofit cost estimates are discussed.