Hip Roof Purlin Support

All angles can be found on the chappell univer.

Hip roof purlin support.

Hip roofs have hip rafters which are oriented diagonally to the ridge and outside walls. The purlins are supported by vertical or slightly angled bracing. The use of purlins as opposed to closely spaced rafters is common in pre engineered metal building systems and both the ancient post and beam and newer pole building timber frame construction methodologies. Purlins as shown in sample photos below are installed for rafter support.

The braces struts or kickers should be within every 4 and should not be at a greater than a 45 degree angle towards the roof slope lower side. In architecture or structural engineering or building a purlin or purline is a horizontal structural member in a roof. Stabilization typically involves installation of a purlin system.