Building codes are the invisible backbone of the built environment. They are the rules and standards that govern how structures are designed, constructed and maintained to protect public health, safety and welfare. They touch every aspect of a building, from its structural frame to its energy performance, fire protection systems and accessibility features.

Roof framing has been gradually evolving from the traditional stick framing to the use of manufactured trusses. This article explores the adoption of manufactured trusses, their configuration, and the structural mechanisms underlying their performance. The article will also look at the advantages that manufactured trusses have over the traditional stick framed roofs.