The group headed by the National Transportation Safety Board investigating the Sept. 9 natural gas pipeline rupture and explosion that killed eight people in San Bruno, Calif., released an interim report that ruled out outside corrosion and damage caused by a third party as the cause for the blast, but found that part of the pipe near the rupture was constructed with seam-welded pipe, which owner Pacific Gas & Electric reported as seamless. Photo: NTSB NTSB investigator examines welds on a pipeline section recovered from the San Bruno explosion. Related Links: NTSB Preliminary Report 9/29/2010 State Inspector Warned PG& E
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.