Kingpost Roof Truss Details

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

Kingpost roof truss details.

The king post roof truss is the simplest of the trusses because of its simple composition. It is used in aircraft construction. Detail of king post and bottom tie beam exploded view of the king post with stirrup connection. King posts also appear in gothic revival architecture queen anne style architecture and occasionally in modern construction.

What are king post trusses. King post roof trusses are the most cost effective truss and they look great when curved braces and webs are used. Therefore the king post truss would have been without doubt the construction used. In aeroplanes the king post supports the top cables and helps to support the weight of the plane s wings.

They have one bottom chord two top chords a king post a vertical central member and optional webs that can be straight or curved. 366 represents a king post roof truss. Trusses are elements where its entire member takes either only compression or tension member are not in bending. It is often used in simple roof trusses such as in the shed porch and garage.

But as it has to be cut out to give a bearing for the struts and principal rafter it really comes out of 9 x 4 inch stuff being 9 inches wide both at top and bottom reduced between to 5 1 2 inches as shown. And the king post k is 5 1 2 x 4 inches at x. S the struts 4x4 inches. P r is the principal rafter 5 inches deep and 4 inches thick.

King post trusses are also used as a structural element in wood and metal bridges. The drawing room unlike the centre section built earlier by sir edward gascoigne had no habitable rooms within the roof space. T the tie beam 9x4 inches.