Pitched Roof Trusses

A howe scissors truss is so called because its appearance resembles that of an opened pair of scissors.

Pitched roof trusses.

The pitched or common truss is characterized by its triangular shape. The chord size and web configuration are determined by span load and spacing. Examples of live loads are snow wind rain and temporary construction loads. Pre manufactured stock trusses are constructed with spruce pine fir spf or southern yellow pine syp lumber.

A pitched roof uses not only the external wall systems but also particular parts of the internal walls. Live loads are not always present. Some common trusses are named according to their web configuration such as the king post fan fink or howe truss. Its bottom chords join together at the apex creating a pitched or vaulted ceiling.

There are two basic methods of pitched roof construction. These trusses the meet building code criteria as specified by structural building components of america sbca and the truss plate institute tpi. A cut roof this is the traditional method of cutting the timber on site and building up the roof using rafters ridge boards joists and purlins etc the exact details being determined by the size of roof size of timbers etc. Roof trusses are engineered wood alternatives to hand framed rafters.

With rafters collars ties struts ridges underpurlins ceiling joists hanging beams combination hanging and strutting beams pitching plates and so on. A pitched roof construction is the classic old school way of roof construction. It is most often used for roof construction.