The rise is the distance from the top of the roof to the bottom.
Run and ise roof.
That s the same as a 14 degree slope or a 25 slope.
3 of rise per 12 of run is the same as 1 of rise per 4 of run or 1 4 25.
Using the example it would be six inches times 13 feet.
A 3 in 12 roof rises 3 for every 12 of run.
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.
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.
Rise and run for your porch roof your roof s slope also called pitch is determined by the rise and run.
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 slope is the steepness of your roof and is the ratio between any two points on your roof.
Calculate the roof rise using the figures for unit rise and total run.
Multiply your figure for unit rise by your figure for total run to get the total rise.
Why is the roof slope 25.
The total roof rise in the example equals 78 inches.