20 Degree Slope Roof

For example in construction you may refer to the pitch of a roof or the grade of a slab.

20 degree slope roof. Roof slopes are identified using the gradient method described above where the rise varies but the run is usually 12. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. Many different professions use slope in describing an angle. Both are referring to angles.

Rise run rise run slope. This chart covers a wider range. 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. Sometimes slope is referred to as pitch angle rise incline or grade.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials. Low slope roofs have gradients of 3 12 or less. Let s suppose we are entering a grade that was computed by rise over slope length.

Find the inverse tangent of the pitch to find the angle in degrees. To find the angle of a roof in degrees convert the pitch to a slope then convert to degrees by finding the arc tangent of the slope. In some very steep roofs you may see the gradient inverted so that the run varies but the rise is held as 12. What degree angle is a 12 12 pitch roof.

The graph towards the top of the page shows a small range of angles from zero to 20 degrees. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. First convert the pitch to a slope. 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.

For a pitch expressed in inches per foot convert to a fraction. To do this simply convert the rise and run as a fraction to a decimal form eg. However if you to do the process using your own knowledge you can still convert pitch to degrees by dividing the rise and run and get its corresponding measurement. With the use of this converter it will be easier for you to locate a 30 degree roof pitch 20 degree roof pitch 25 degree roof pitch or a 15 degree roof pitch.

Enter 2 44992 and reading the second output line we see this yields a 1 in 40 ratio and a 1 4321 degree angle. Degrees tan 1 43 calculated out this gives an angle of 23 27 degrees.