Steep Roof Framing Details

Vertical rise over horizontal run.

Steep roof framing details.

When you see this detail below it is referring to the pitch of the roof. 3 inch rise per 12 run is a 3 12 pitch roof. To view a cad detail you will need a cad design program or a cad viewer program. Roof pitch the roof pitch is the numerical measure of how steep or shallow a roof is.

The rise or height of the roof at its peak is the altitude of the triangle. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. We wanted to make the porch roof as steep as possible while keeping the peak of the roof below the wall to roof intersection at the top of the shed roof. The run or half the building span is the base of the triangle.

This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams. After a taking some measurements and doing a bit of ciphering we established that the steepest pitch we could use on the porch roof was 4 in 12. Unless of course you have a very steep pitch on your trusses or rafters. 4 12 through 9 12 are the most common pitches.

Cad details are available in dwg dwf dxf and pdf format. For the shed roof pictured above the back has a 5 12 pitch. Some of these can support the roof and prevent ridge sagging and wall spreading. Then you will have more storage.

Collar ties rafter ties tension beams structural ridge beams. Steep slope roofing products are generally more visually appealing because they are critical aesthetic components for residential construction where the roof can consist of 40 of the exterior visual appearance of a home. The style is affected too because the framing of the roof changes the slope. When you locate the detail you want just click one of the four file format buttons to download it to your computer.