A magnitude-7.5 quake, simulated by a shake table on July 14, proved performance-based seismic design is valid for a six-story, wood-frame residential building on a one-story steel frame. Damage was negligible, say investigators from Colorado State University and Simpson Strong-Tie.

Historic-Size Quake Test Validates ‘Performance’ Seismic Design
Photo: Simpson Strong-Tie Company Inc.