As 280,000 daily vehicles resumed using the San Francisco-Oakland Bay Bridge on Nov. 2 after a six-day repair of a steel saddle that holds a cracked truss section in place, engineers and metallurgists were still investigating why the original Labor Day weekend fix failed so quickly. Photo & Diagram: Caltrans Bay Bridge closed down for nearly a week after steel members repaired in September fell into traffic. A second emergency contractor again addressed a cracked eyebar in the truss. The Oct. 27 failure occurred when a 5,000-lb crossbeam and steel connectors fell into afternoon traffic, causing one accident and a
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.