Formula To Find The Pitch Of A Roof

In civil engineering the slope is the numerical measure of the steepness of a roof.

Formula to find the pitch of a roof. Pitch tan angle where angle is the roof pitch expressed in degrees. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. For example if a roof has a pitch of 4 12 then for every 12 inches the building extends horizontally it rises 4 inches. Roof pitch refers to the slope which the rafter creates.

The roof pitch is the slope of the rafter. The slope is the same as the pitch. If you want to find the roof pitch in the form of x 12 simply calculate the pitch and substitute 12 for the run length. Divide the slope by two to get the pitch.

You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof. Roof angle can be obtained by diving rise by run and take the tan inverse of the result. The rise is the height of the roof and the run is the horizontal span as pictured above. For a roof with the ridge above one wall the span is the same as the run.

Roof slope is also called as roof pitch. The pitch value can be obtained by dividing n by 12 and divide s by the answer. In the imperial unit of measurements the slope is expressed with the rise and run. By slope angle formula steepness can be obtained by dividing vertical rise by horizontal span.

The pitch is commonly defined as the ratio of rise over run in the form of x 12. Often you express roof pitch as the ratio between the rise and the run in the form of x 12.