For Roof Slopes From 2 12 To 4 12

Most roof s have a pitch in the 4 12 to 9 12 range.

For roof slopes from 2 12 to 4 12.

Find the arctangent of the resulting value. A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. For a slope of 35 tan 35 0 700. Divide the percentage number by 100.

Roof pitch is a term describing how steep or flat your roof slope is. The table below shows common roof pitches and the equivalent grade degrees and radians for each. 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 a roof slope rises say 4 inches when measured 12 inches along the bottom of a horizontal roof truss the roof slope is said to be 4 12.

This will give you the rise over run or pitch. I e 4 inches of rise per 12 inches one foot of run. 55 slope is equal to a slope of 28 81. For a slope of 55 55 divided by 100 0 55.

The combination of two numbers are used to display or show the roof pitch. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter. 0 7 x 12 8 4.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. For example if you measure 4 inches the pitch of your roof is 4 12. Roof slopes are most commonly defined by the rise over run ratio.