Officials suspect work on a new 3.9-km metro line as the most likely cause of the early afternoon collapse of the city’s historical archive building in Cologne, Germany, on March 3. Buildings adjacent to the six-floor archive structure, which was erected in 1971, were demolished. By the morning of March 4, two people were thought missing, though no injuries had been reported. A Cologne city hall spokesman says the collapse occurred over a few minutes as ground beneath the archive caved in. The buildings were some 20 meters above new twin tunnels of Cologne Transport Company’s (KVB) North-South line, due
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.