Traditional King Post Roof Truss

They have one bottom chord two top chords a king post a vertical central member and optional webs that can be straight or curved.

Traditional king post roof truss.

The king post roof truss is the simplest of the trusses because of its simple composition. This style can be embellished with radius cuts on the struts and a through tenon at the base of the king post as pictured above. Tie beam two inclined principal rafter two struts king post. What are king post trusses.

The king post truss consists following components. King post an upright post in the centre of a roof truss extending from the tie beam to the apex of the truss. The crown post rises to a crown plate immediately below and supporting collar beams it does not rise to the apex like a king post. A king post truss utilizes two top chords a bottom chord and a piece that connects the bottom and top chords vertically called a king post.

The truss has four main parts. In traditional timber framing a crown post looks similar to a king post but it is very different structurally. They are only good up to 16 as larger structures require a greater weight distribution. The king post truss is also used for simple roof lines and short span bridges.

In a nutshell it s made up of a central vertical post called the king post two rafters meeting at the apex and a tie beam or the horizontal base. This truss is very adaptable with regard to desired span and roof pitch. Whereas the king post is in tension usually supporting the tie beam as a truss the crown post is supported by the tie beam and is in compression. In aeroplanes the king post supports the top cables and helps to support the weight of the plane s wings.

It is used in aircraft construction. The top two diagonal pieces that serve as rafters are known as the upper cords. The bottom horizontal which serves as ceiling and upper floor joist is known as the lower cord. The king post truss with struts is popular timeless very strong and an elegantly simple truss design.

A king post truss is a simple triangular gable truss with a center brace known as the king truss. Simple to make and require a small amount of lumber king post trusses are ideal for small structures. The king post truss is also called a latin truss.