The prototype radiotherapy system combines a fixed vertical radiation beam with horizontal patient rotation. (Courtesy: Paul Liu) Radiation therapy plays a fundamental role in cancer treatment, but ...

In most motorbikes and cars, headlight controls are limited. They have a fixed direction of beam and it can only be switched between high beam and low beam. This makes it difficult to drive when there ...

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.

Welcome back to the "Behold the Beam" series of articles. In part three (Firehouse®, September 2010) of the series, we discussed the first five of the 13 common types of beams that firefighters can ...

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 ...

Q: 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. Is it ...

Q. 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. Is it ...