Formula To Find The Slope Of A Roof

Use the following formula which also describes a right triangle.

Formula to find the slope of a roof.

Generally roof pitch is calculated from the same formula that describes a right triangle. First find the slope by finding the tangent of the degrees eg. You can use the following equations to find the length of the rafter and the slope. Conventional slope roof range between 4 in 12 and 8 in 12.

Rise run pitch where pitch is expressed in percent. By slope angle formula steepness can be obtained by dividing vertical rise by horizontal span. That is the roof s rise. Roof pitch calculator results explained 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.

There s no need to simplify them. If you know the angle of the roof in degrees you can find the roof pitch by converting the angle in degrees to a slope then finding the rise by multiplying the slope by 12. In civil engineering the slope is the numerical measure of the steepness of a roof. How to calculate roof pitch.

Then multiply the slope by 12 to get the rise. Rafter rise run this formula is from the pythagorean theorem. Outside of the u s a degree angle is typically used. Roof slope is also called as roof pitch.

It is often compared to slope but is not exactly the same. There are two main categories of roofing. This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. Here are the equations you may use to solve for the length of the slope and the rafter.

In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. You can also calculate roof pitch even without using a roof slope calculator. Tan 45o 1 00. 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.

Roof pitch degree table. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Roof slope style. Just write down the measurements you found.

A flat roof has a slope of 2 in 12 or less. The run always remains constant at 12 inches. The slope of your roof is the ratio of vertical distance rise to horizontal distance run. Rafter rise run from the pythagorean theorem.

Slope tan degrees. Image 1 12 to 12 12 roof pitch 7 12 pitch.