Roof Truss Cut Angles

All roof rafters should be identical so follow the same steps to measure the plumb cut tail cut and birdsmouth cut.

Roof truss cut angles.

Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. For larger structures 2 by 6 lumber can be used. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Using a speed square for measuring angle cuts for shed trusses.

The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. If i m building a 5 inch rise per 12 inch run roof what are all the degrees for each angle cut to build 12 long common trusses. I am building a 12x16 shed and now having a problem with cutting the angels for the roof trusses the angles are on one end 23 degrees from end i guess what i am asking how do you get the degrees right. The number of rafters needed will be determined by the length of your roof.

Depending on the size of your structure you will need to cut several or many more. Most trusses are built from 2 by 4 lumber. Roof pitch calculator results explained. At this point you ve cut 1 roof rafter.