Gable Roof Rafter Framing

Framing a gable roof building a gable with barge end purlin struts and collar ties the picture above shows the plan view of a gable roof.

Gable roof rafter framing.

The run or half the building span is the base of the triangle. After they re up you can snap a line to mark and trim the tails in a nice straight line to make up for any ridge warp or marking cutting and fixing errors. It is always better to have a large rafter rather than be concerned with a sagging roof. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center.

And the line length measurement from the roof peak to the building wall is the hypotenuse. Framing a dropped gable wall one of the keys to framing the rake with my system is building a dropped gable end wall the top of which is 3 1 2 inches below the tops of the rafters. Use 8 penny nails to attach the first 2 in 4 in 5 1 cm 10 2 cm board to the wall studs. Framing the gable ends 1 nail 2 boards onto your walls as top plates.

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. A standard triangular roof known as a gable roof is framed using rafters which are diagonal members that support the roofing materials. Ladder trusses are made up using four noggins bridging at each corner to support a rafter outside the building. If you re framing a gable roof on a new house or building a shed or even a doghouse with a gable roof you ll need to cut a number of roof rafters.

The roof rafters provide integral structural support to the roof. Gable roof framing calculator plan diagram with full dimensions. The rise or height of the roof at its peak is the altitude of the triangle. The only laudable smartphone app for unequal pitched gable roofs that will give the correct length of the rafters is rafter tools for android.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. 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. Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter.