Mass. Department of Transportation crews have completed installation of high-strength support straps on approximately 25,000 tunnel light fixtures in the Boston Big Dig Central Artery tunnels as a safety measure.The system was developed as a temporary three-to-five-year solution to the tunnel light corrosion issues while engineers evaluate options for a long-term solution, the agency noted in a July 25 press release..Paul Norton, principal at TranSystems in Boston, which served as transportation consultant for Mass DOT, says the high-strength polymer support strapping wraps around the entire lighting fixture and engages the steel Unistrut structure. “We studied 10 alternatives based on cost,
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.