A 40-second test in Japan on the world’s largest shake table demonstrated for the first time that wood-framed mid-rise buildings can be built to withstand major earthquakes, say researchers. The simulation of a magnitude-7.5 quake on a six-story residential building caps a $1.4-million research project that is elevating performance-based seismic design of wood frames. The work is expected to result in new standards for mid-rise wood buildings, which rarely are allowed in quake zones. Photo: Neeswood and Simpson Strong-Tie World’s largest shake table helped demonstrate the viability of performance-based seismic design for wood frames. During the July 14 test, the
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.