Run And Ise Roof

A 3 in 12 roof rises 3 for every 12 of run.

Run and ise roof.

Rise and run for your porch roof your roof s slope also called pitch is determined by the rise and run. Why is the roof slope 25. 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.

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. 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. The total roof rise in the example equals 78 inches.

3 of rise per 12 of run is the same as 1 of rise per 4 of run or 1 4 25. The slope is the steepness of your roof and is the ratio between any two points on your roof. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run. The horizontal change in distance or the horizontal distance covered by an un supported rafter or truss.

The run is the distance from the outside of the wall to the inside of the ridge. Total roof rise or change in elevation for a 38 degree sloping roof angle t with one giant rise or step of 7 8 feet to the center of the attic y 2 would have total a run x 2 of 10 feet. Using the example it would be six inches times 13 feet.