Queen Post Roof Truss Design

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.

Queen post roof truss design.

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 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. The truss is a framework consisting of rafters posts and struts which supports your roof. A king post uses one central supporting post whereas the queen post truss uses two.

King post trusses are also used as a structural element in wood and metal bridges. This free online truss and roof calculator generates the axial forces and reactions of completely customisable 2d truss structures. The queen post truss is simpler and lighter in weight. As we will see below there are several different types of designs and this will impact the angles and designs of the overall truss.

Bonnet roofing systems are basically a mansard roof backwards. Queen post truss is used when there is a need to cover large areas. King posts also appear in gothic revival architecture queen anne style architecture and occasionally in modern construction. It does not put weight on the centre of the main tie beam as the king post truss.

Alpine truss designs are engineered to meet specific span configuration and load conditions. A queen post is a tension member in a truss that can span longer openings than a king post truss. While this article focuses on configurations we also have a very cool set of illustrations showcasing the different parts anatomy of roof trusses. Queen post roof truss design hood roof.

Queen post truss is suitable for 8 to 12 meters. Likewise referred to as kicked eaves a hood roof has 4 sides with a high top incline as well as a. This type of queen post roof truss design is incredibly immune to solid winds so is optimal for high wind or cyclone vulnerable locations. The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers.

They look great and offer an open area in the middle of the truss. 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. This truss is made from a variety of materials such as timber or steel. Just as there are many types of roofs with many roof parts there are many different types of roof trusses this extensive article explains through a series of custom truss diagrams the different truss configurations you can use for various roofs.

The oldest surviving roof truss in the world is a king post truss in saint catherine s monastery egypt built between 548 and 565.