Design Guide 40, Rain Loads and Ponding provides guidance for designing roof systems to avoid or resist water accumulation and any resulting instability. It includes an in-depth review of rain loads ...

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 ...

Open-web bowstring trusses and steel joists were also used on the interior roof to match the arched profile of the exterior canopies. “Anytime you have different arched chords or use bowstring trusses ...