Steep Roof Framing Details

When you see this detail below it is referring to the pitch of the roof.

Steep roof framing details.

3 inch rise per 12 run is a 3 12 pitch roof. The style is affected too because the framing of the roof changes the slope. 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. Some of these can support the roof and prevent ridge sagging and wall spreading.

Cad details are available in dwg dwf dxf and pdf format. Roof pitch the roof pitch is the numerical measure of how steep or shallow a roof is. 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 rise or height of the roof at its peak is the altitude of the triangle.

For the shed roof pictured above the back has a 5 12 pitch. Collar ties rafter ties tension beams structural ridge beams. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. 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.

4 12 through 9 12 are the most common pitches. To view a cad detail you will need a cad design program or a cad viewer program. When you locate the detail you want just click one of the four file format buttons to download it to your computer. The run or half the building span is the base of the triangle.

And the line length measurement from the roof peak to the building wall is the hypotenuse. Unless of course you have a very steep pitch on your trusses or rafters. Then you will have more storage. Your shed roof framing is not as complicated as you might think.