Gable Roof Without Ridge Board

Because the ridge board is a smaller member typically only an inch thick sometimes even less it is not a structural member and doesn t carry the gravity load.

Gable roof without ridge board.

Its only job is to provide a connection point for the roof joists on each side of the roof. A structural ridge is the standard alternative to ceiling joists. You don t need a ridge beam but you do need a way to keep the walls from spreading. Ridge beams are required by code if the roof slope is less than 3 in 12 irc section r802 3.

A ridge board isn t a beam per se. For 2 x 6 rafters use a 2 x 8 ridge board and so on. Ridge board the engineering principles of the ridge board are a bit more complicated. Framing a gable roof building a gable with barge end purlin struts and collar ties.

Choose a ridge board that is one size larger than your common rafters. In this design the tops of the rafters attach to a load bearing ridge beam that runs along the length of the roof. Ridge beam sizing is based on the span of the beam between supports and the amount of roof load supported by the beam. A gable roof is a simple symmetrical triangular roof.

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. It s often just a nice way to bring the rafters together. A ridge board is a non structural member that serves as a prop for opposing rafters to rest against and connect to. To build your gable roof you ll need wooden boards cut into joists rafters supports and a ridge board in addition to sheathing felt paper and shingles.

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. In conventional gable roof framing the slope of the roof is formed by rafters that run diagonally downward from the peak of the roof to the tops of the exterior walls of the building. The ridge board s length will be the outside measurement of the building plus the length of the overhang at both ends. For 2 x 4 rafters use a 2 x 6 ridge board.