Q. Tim, I’ve never worked with metal joist hangers. How long have joist hangers been around? When I hold one in my hand, I question whether it’s actually strong enough to support all the weight that ...

This graphic illustrates a new design for the framework of columns and beams that support bridges, called "bents," to improve performance for better resistance to earthquakes, less damage and faster ...

Officially identified as Column 1001-B, the steel beam, one of 47 that held up the South Tower, was quickly plastered with Mass cards, rosary beads, flags, photos of missing innocents, letters from ...