Traditional Queen Post Roof Truss

The queen post truss is simpler and lighter in weight.

Traditional queen post roof truss.

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. It s also more lightweight and can be used to cover larger areas. King post trusses are also used as a structural element in wood and metal bridges. This arrangement is particularly good for longer truss spans in excess of 24 feet.

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. This truss is made from a variety of materials such as timber or steel. 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. What is a queen post truss.

This truss is also very strong and adaptable with regard to desired span and roof pitch. Unlike the king post the queen post has two wooden vertical posts called queen post. They look great and offer an open area in the middle of the truss. Queen post truss is suitable for 8 to 12 meters.

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. Queen post trusses provide for larger spans than those capable of a king post. 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 does not put weight on the centre of the main tie beam as the king post truss.

Queen post timber trusses can easily span 30 feet or more. King posts also appear in gothic revival architecture queen anne style architecture and occasionally in modern construction. They make a fan type design hence then name fan truss. A queen post roof truss is essentially a modification of the king post truss.