Gable End Roof Overhang Framing

Framing for gable end overhangs rakes for steel framing is codified in the irc 2012 2015 r804.

Gable end roof overhang framing.

There are no similar requirements for wood framing. Of the many ways that gable end overhangs are built the two most common ways are the use of ladder details and outriggers ladder details are usually adequate if the overhang is less than about 8 inches although they are frequently used for longer overhangs. The biggest problems with gable end overhang strength occur if your roof overhang is greater than about 12 inches. The picture above shows the plan view of a gable roof ladder trusses are made up using four noggins bridging at each corner to support a rafter outside the building.

Inadequate nailing of the sheathing to supporting framing or inadequate connections of the framing at the rake edge that supports the roof. Due to the steeper angle of gable roof the maximum width of the eaves is narrower than other shed styles. This can be from two causes. After the gable is framed lookouts extend from the first rafter inside the gable wall out over the plates to support the overhanging barge rafter.

The american wood council s 2012 wood frame construction manual defines rake overhang as the horizontal projection of the roof measured from the outside face of the gable endwall to the. For slanted roof sheds overhangs add character and facilitate proper drainage. A rake on the gable end of the roof can be created with the construction of additional roof framing. After the end points of the plates are located the length is found using a base 1 triangle for a 6 in 12 pitch where the hypotenuse is 1 118 times the length of the base.

Framing a gable roof building a gable with barge end purlin struts and collar ties. That rafter outside forms the overhang for the barge boards to fix to and so the soffit boards and ventilation are continuous all the way. Then load bearing roof beams fixed to the trusses are extended in the same way. After that you should fix the cornice board to the end sides of the ridge and the load bearing beams.

Uplift of roof decking at the overhang.