Pitched Roof Trusses

Some common trusses are named according to their web configuration such as the king post fan fink or howe truss.

Pitched roof trusses.

Roof trusses are engineered wood alternatives to hand framed rafters. Its bottom chords join together at the apex creating a pitched or vaulted ceiling. Pre manufactured stock trusses are constructed with spruce pine fir spf or southern yellow pine syp lumber. 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.

A pitched roof uses not only the external wall systems but also particular parts of the internal walls. The pitched or common truss is characterized by its triangular shape. Examples of live loads are snow wind rain and temporary construction loads. The chord size and web configuration are determined by span load and spacing.

A pitched roof construction is the classic old school way of roof construction. A howe scissors truss is so called because its appearance resembles that of an opened pair of scissors. Live loads are not always present. They are designed at a 4 12 pitch to be spaced 2 foot on center.

There are two basic methods of pitched roof construction. With rafters collars ties struts ridges underpurlins ceiling joists hanging beams combination hanging and strutting beams pitching plates and so on. Naturally this truss is used in buildings for creating a pitched roof.