1 12 Roof Pitch Degrees

To convert between american roofing ratios and pitch degrees follow these steps.

1 12 roof pitch degrees.

On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. Find all the needed factors in order to determine the pitch angle s degree. Last updated july 10 2020 the following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. A 12 12 pitch roof has a pitch angle of 45.

Steeper slopes increase the sail effect that makes them susceptible to wind. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. Lower slopes don t handle wind driven rain as well. What is a 1 12 roof pitch if a roof rises 1 in a length of 12 this is 1 12 roof pitch.

Roof pitch and corresponding angles. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. So use the 12 inch level as a constant run and 18 inch ruler as a variable rise. Roof pitch degree table.

Find the inverse tangent of the pitch to find the angle in degrees. A pitch over 9 12 is considered a. For this you can take help from roof pitch factor chart. The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily.

Locate its tangent or tan and follow the left row for you to read its corresponding degree. Image 1 12 to 12 12 roof pitch 7 12 pitch. Roof pitch angle roof pitch multiplier 1 12 4 76 1 0035 2 12 9 46 1 0138 3 12 14 04 1 0308 4 12 18 43 1 0541 5 12 22 62 1 0833. Other than the 45 roof slope which is 12 in 12 none of the standard roof pitches 5 in 12 6 in 12 etc are equal to a whole degree.

If a roof or ramp rises 4 in a length of 12 the pitch is 4 in 12 which is 18 43 or 33 33 grade enter base length to calculate rise and diagonal for current pitch angle. Select inches to enter decimal inches or millimeters for metric. 1 12 roof pitch angle 4 76 degrees. What roof angle in degrees.

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