Nearly a decade ago, early in conceptual design for the 230,000-sq-ft infill addition to the American Museum of Natural History in Manhattan, talks with potential contractors made it apparent that ...

It wasn’t swimming weather, as jets of wet concrete about the same hue as the gray January sky were sprayed over a framework of rebar Tuesday. But the start of the shotcrete installation marked a ...

Connecting Pittsburgh, Penn., to its southern hills, the Liberty Tunnels serve as one of the major arteries to the city, eliminating the need to travel over or around Mt. Washington. Before the ...