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. Photo: Simpson Strong-Tie Company Inc. Related Links: Jumbo Quake Test Validates Design: Magnitude 7.5 Tembler Jolts Connections
The market is generally healthy and steadily growing, and margins are up for large specialty contractors. Further, advances in design tools and owner demand for collaboration are giving subcontractors a seat at the table early on in projects.