Hip Roof Purlin Support

Purlins as shown in sample photos below are installed for rafter support.

Hip roof purlin support.

If you see sagging rafters recommend stabilization by a qualified contractor. Hip rafters are simply called hips and are shown here as brown. In architecture or structural engineering or building a purlin or purline is a horizontal structural member in a roof. Purlins support the loads from the roof deck or sheathing and are supported by the principal rafters and or the building walls steel beams etc.

Hip roofs have hip rafters which are oriented diagonally to the ridge and outside walls. 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. The purlins are supported by vertical or slightly angled bracing.