The Federal Transit Administration approved last month the Metropolitan Washington Airport Authority’s revised testing plan for eleven 30-year-old foundations that will be used to support piers for the new Dulles Metrorail extension in northern Virginia to Dulles International Airport. Photo: Dulles Corridor Metrorail Project Team Agency will begin tests on piers originally built in the 1970s to see if they can handle new light-rail system to Dulles Airport, after initial criticism. The concrete foundations, supported by concrete and steel caissons driven 50 to 60 ft deep, are among 13 that were installed by the Virginia Dept. of Transportation in 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.