Traditional Queen Post Roof Truss

This arrangement is particularly good for longer truss spans in excess of 24 feet.

Traditional queen post roof truss.

The queen post truss is simpler and lighter in weight. 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 truss is suitable for 8 to 12 meters. These trusses are capable of handling spans up to 22 long.

King post trusses are also used as a structural element in wood and metal bridges. They make a fan type design hence then name fan truss. The king post truss with struts queen posts is based on the popular king post truss design but with the addition of two queen posts pictured above. It s also more lightweight and can be used to cover larger areas.

A queen post roof truss is essentially a modification of the king post truss. Sometimes referred to as a palladian truss the queen post truss consists of two principal rafters a tie beam two vertical posts queen posts and a straining beam. Unlike the king post the queen post has two wooden vertical posts called queen post. It does not put weight on the centre of the main tie beam as the king post truss.

Queen post trusses provide for larger spans than those capable of a king post. This truss is also very strong and adaptable with regard to desired span and roof pitch. Queen post timber trusses can easily span 30 feet or more. 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 also known as a fan truss this type of truss is just like a king post except that it has two diagonal braces or web runners emanating from the bottom of the king post to the top chords on either side. King posts also appear in gothic revival architecture queen anne style architecture and occasionally in modern construction. 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.