Mission Specialists Joe Tanner and Heidemarie Stefanyshyn-Piper wrapped up STS-115’s first spacewalk at 11:43 a.m. EDT. Their efforts centered on preparing the P3/P4 truss for operation. The new truss ...

An aerial drone photo taken on Aug. 18, 2025 shows the construction site of Hanjiang River bridge of Xi'an-Shiyan high-speed railway in Shiyan City, central China's Hubei province. Hanjiang River ...

Wood truss construction surged in popularity in the 1960s and ’70s, but back then most buildings that used metal-plate-connected wood trusses had flat ceilings. With today’s CAD and BIM technology, ...