In Maine, contractors are “blowing up” bridges: They are inflating hollow carbon-fiber tubes on-site, bending them into arches and infusing them with resin. Filled with concrete, the bridges are ready to be decked, backfilled and paved. Acting as bridge arches for short spans, carbon tubes are inflated and filled with concrete by workers in Maine. Related Links: Dozens of Test Projects Later, Advocates Still Have Durable Dreams Material for Milk Containers Now Supports Railroad Traffic Brit E. Svoboda, chief executive of Advanced Infrastructure Technologies Inc., which owns the rights to the system, is hiking around the U.S. to promote its
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.