Queen Post King Post Roof Truss

A queen post is a tension member in a truss that can span longer openings than a king post truss.

Queen post king post roof truss.

King post trusses are also used as a structural element in wood and metal bridges. This truss is made from a variety of materials such as timber or steel. Even though it is a tension member rather than a compression member they are commonly still called a post. Queen post roofs queen post trusses are used for spans over 30 feet and contain two perpendiculars to brace up the tie beam spanning the walls.

Day bridge in southwestern pennsylvania. It is not suitable for the long span. The truss is suitable for spans varying from 5 to 8 metre. The king post truss does not provide storage space because the frames are usually exposed and do allow extra room.

They look great and offer an open area in the middle of the truss. 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. 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.

King post truss is used when there is a need to support the weight of an expansive roof. The oldest surviving roof truss in the world is a king post truss in saint catherine s monastery egypt built between 548 and 565. It does not put weight on the centre of the main tie beam as the king post and crown post do. Roofs constructed with the combination of king queen post roof trusses are a mansard truss truncated truss and king and queen post truss.

A queen post is often confused with a queen strut one of two compression members in roof framing which do not form a truss in the engineering sense. The pictures of hales hall barn w axham great barn and w estenhanger castle barn next page show how the queen truss may have developed into the hammer beam roof. The queen post truss gradually replaced other truss types. Queen post truss is suitable for 8 to 12 meters.

Queen post timber trusses can easily span 30 feet or more. The queen post truss is simpler and lighter in weight. What is a queen post truss. Queen post roof trusses alone are suitable for span up to 13 5 or 14 meters.

It is simple r lighter and requires less wood. 379 is a queen post truss for a 32 feet span. King and queen post truss. King posts also appear in gothic revival architecture queen anne style architecture and occasionally in modern construction.