Overhang Dutch Gable Roof Framing

The biggest problems with gable end overhang strength occur if your roof overhang is greater than about 12 inches.

Overhang dutch gable roof framing.

Exactly where the gable interrupts the hip is called the setback the distance from the end of the building to the first set of gable common rafters. I planned to use the experience to teach the contractor s crew western style framing. I would use continuation jack rafters to frame in the small gable like extension that is an integral part of the dutch hip design. By doing this it changed the as drawn cantilever ratio of 3 2 favoring the outside of the building to a 5 7 ratio.

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. In 2011 i was given the opportunity to frame up four small houses with dutch hip roofs on a remote island in the tropics. 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. A large overhang on a dutch hip roof requires a few changes to the normal construction method.

Inadequate nailing of the sheathing to supporting framing or inadequate connections of the framing at the rake edge that supports the roof. Uplift of roof decking at the overhang. The other common wind related failure at gable ends is uplift of the roof decking at the overhang. This can be from two causes.

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. The dutch is a section of hip roof in which hip rafters run into a gable end instead of going up to a ridge.