Queen Post Roof Truss Span

Even though it is a tension member rather than a compression member they are commonly still called a post a queen post is often confused with a queen strut one of two compression members in roof framing which.

Queen post roof truss span.

A king post has a central vertical post as used in architectural or bridge designs working in tension to support a beam below from a truss apex above. Queen post roof trusses are very similar in design to king post trusses except that the interior of the truss has two vertical queen posts instead of one central king post. These steel joints are needed to support the overall truss. A queen post is a tension member in a truss that can span longer openings than a king post truss.

This truss is made from a variety of materials such as timber or steel. They look great and offer an open area in the middle of the truss. Queen post truss is used when there is a need to cover large areas. The oldest surviving roof truss in the world is a king post truss in saint catherine s monastery egypt built between 548 and 565.

Queen post timber trusses can easily span 30 feet or more. Queen post roof truss queen post truss is define as a pitched roof support using two vertical tie posts connected between the tie beam and the rafters. It can also be built of combination of wood and steel. A king post uses one central supporting post whereas the queen post truss uses two.

It does not put weight on the centre of the main tie beam as the king post truss. Parts of a truss framed roof gable end valley set gi rde t u s dutch hip girder dutch hip framing stepdown hip framing end jack stepdown girder. King post trusses are also used as a structural element in wood and metal bridges. As the name implies this pitched truss has the combined appearance of the queen post truss and scissors truss.

King posts also appear in gothic revival architecture queen anne style architecture and occasionally in modern construction. King post roof truss spans upto8m king post truss is a wooden truss. Alpine truss designs are engineered to meet specific span configuration and load conditions. Total load psf duration factor live load psf roof type 55 1 15 40 snow shingle 55 1 15 30 snow tile 47 30 snow 40 20 snow 1 25 20.

The more complex the truss framework is the greater quantity of these joints will be required. Its web configuration resembles that of the queen post truss while its appearance resembles that of the scissors truss. Common truss types and spans 1. Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge.

It can be used for spans upto 8m. Queen post truss is suitable for 8 to 12 meters. Queen post truss spans upto 10m queen post truss is also a wooden truss. Common trusses their spans king post span up to 16 queen post fan spans 10 to 22 fink w spans 16 to 33 howe k spans 24 to 36.

The queen post truss is simpler and lighter in weight. The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers.