A king post is a central vertical post used in architectural or bridge designs, working in tension to support a beam below from a truss apex above. In aircraft design a strut called a king post acts in compression, similarly to an architectural crown post.

What is a king post on a truss?

The king post truss is used for simple roof trusses and short-span bridges. ... The truss consists of two diagonal members that meet at the apex of the truss, one horizontal beam that serves to tie the bottom end of the diagonals together, and the king post which connects the apex to the horizontal beam below.

What is the purpose of king post truss?

King post truss is used when there is a need to support the weight of an expansive roof. This roof provides not only functionally, but also adds beauty as well. The king post truss is also used for simple roof lines and short span bridges. It is used in aircraft construction.