Strong Backs And Purlin Braces For Large Hip Roofs

For a heavy roof for each 25 m of roof plan area or part thereof one roof plane diagonal brace or one roof space diagonal brace is required.

Strong backs and purlin braces for large hip roofs.

So a question on purlin braces for you. Bracing must be installed off of walls or beams. An important notation is that the purlin bracing should be off of walls or beams as needed. When they could have used 2 x 8 or 2 x10 rafters and not have had to use purlin braces at all.

Hips rest on an outside corner at the bottom and connect to the ridge at the peak. Purlins are installed horizontally under metal roofs. Hip rafters are simply called hips and are shown here as brown. Purlins braces shall be 2 x 4 s and shall be installed to bearing walls.

Use this for gable roofs hip roofs and combinations of these. Purlins as shown in sample photos below are installed for rafter support. Stabilization typically involves installation of a purlin system. These purlin braces or any other roof braces ridge braces hip rafter bracing along with valley bracing must not be supported off the ceiling joists.

Tbd22 typical tsbr2 24 typical gbc see back page simpson strong tie 1 9 7 5 3 1 1 2 1 0 8 6 4 2 3 2 2 vtcr see back page 2011 simpson strong. Most crews and builders adhere to it. On hand framed roofs there are a pretty established set of rules basically code regarding joist and rafter size hip and ridge size purlin bracing ridge bracing strong backs hog backs etc. Please see the back page of this flier for information about these products.

They give added support to the roof and also provide a nailing surface for the end panels and drip edge. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. For a light roof for each 50 m of roof plan area or part thereof one roof plane diagonal brace or one roof space diagonal brace is required. Aheps adjustable hip end purlins for step down hip systems and gbcs gable end brace connectors.

Hip roofs have hip rafters which are oriented diagonally to the ridge and outside walls. 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. 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. Purlins are 2 by 4 feet and are installed much like metal roofing.

One of the problems i see contributing to the destruction is the use of 2 x 6 rafters necessitating the use of large double lvl beams to support the purlin braces. Lumber attached to those larger purlins. The slope angle shall not be more than 45 degrees from the horizontal and spaced no more than 48 on center.