DEAR TIM: I’m getting ready to build a large room addition that needs a beam to support the floor joists. I’ve been told that a wood beam will work, but I’ve always seen steel I-beams in other houses.

Many renovated buildings replace wood and masonry structural elements with steel. The replacement of heavy wooden roof and floor joists with the lighter steel open-web bar-truss joists is a common ...

We explored a variety of concepts, from twin-tub girder types to orthotropic deck systems,” he notes. SSSBA organized a modular steel-bridge task group to explore the possibilities. The group, made up ...