Run And Ise Roof

The run is the distance from the outside of the wall to the inside of the ridge.

Run and ise roof.

The total roof rise in the example equals 78 inches. On a 38 degree sloping roof angle t each individual vertical rise of 9 4 y 1 would have a horizontal run x 1 of 12 inches. 3 of rise per 12 of run is the same as 1 of rise per 4 of run or 1 4 25. Why is the roof slope 25.

The slope is the steepness of your roof and is the ratio between any two points on your roof. For example if the roof rises 4 feet and the span is 16 feet twice the run then the pitch is 4 16 or 1 4. That s the same as a 14 degree slope or a 25 slope. Rise and run for your porch roof your roof s slope also called pitch is determined by the rise and run.

Using the example it would be six inches times 13 feet. The horizontal change in distance or the horizontal distance covered by an un supported rafter or truss. Calculate the roof rise using the figures for unit rise and total run. The rise is the distance from the top of the roof to the bottom.

Here is an online rise and run calculator which helps to calculate pitch slope and angle with the help of rise and run values. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run. A 7 12 roof normally expressed as a ratio means that for every 12 inches horizontally the run your roof rises 7 inches.