Run And Ise Roof

The rise is the distance from the top of the roof to the bottom.

Run and ise roof.

A 3 in 12 roof rises 3 for every 12 of run. Using the example it would be six inches times 13 feet. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run. Multiply your figure for unit rise by your figure for total run to get the total rise.

The total roof rise in the example equals 78 inches. The slope is the steepness of your roof and is the ratio between any two points on your roof. A 7 12 roof normally expressed as a ratio means that for every 12 inches horizontally the run your roof rises 7 inches. 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. 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. 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. 3 of rise per 12 of run is the same as 1 of rise per 4 of run or 1 4 25.

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 run is the distance from the outside of the wall to the inside of the ridge. That s the same as a 14 degree slope or a 25 slope.