King Post Roof Truss Diagram

Many building codes do not allow a roof on a shed to be less than 3 12 as flatter roofs are more prone to leaks and snow damage.

King post roof truss diagram.

The truss has four main parts. King post truss is used when there is a need to support the weight of an expansive roof. The king post roof truss is the simplest of the trusses because of its simple composition. The bottom horizontal which serves as ceiling and upper floor joist is known as the.

A king post truss is a simple triangular gable truss with a center brace known as the king truss. 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. The king post truss does not provide storage space because the frames are usually exposed and do allow extra room. The top two diagonal pieces that serve as rafters are known as the upper cords.

King posts were used in timber framed roof construction in roman buildings and in medieval architecture in buildings such as parish churches and tithe barns the oldest surviving roof truss in the world is a king post truss in saint catherine s monastery egypt built between 548 and 565. Roof trusses have revolutionized roof framing. Parts of a truss panel length peak continuous la teral brace 12 slope pitch tru s pl te top chord heel bottom chord bearing point splice panel point w edg block span out to out of bearings cantilever overhang bottom chord length web double cantilever common trusses their spans king post span up to 16 queen post fan spans 10 to 22. A run of 12 12 is a 45 degree angle.

King posts also appear in gothic revival architecture queen anne style architecture and occasionally in. It is not suitable for the long span. We will be going over how to do a king post truss on a shed with a 4 12 roof but it can be done on any type of pitch. It is often used in simple roof trusses such as in the shed porch and garage.