More Picture Of How To Calculate Roof Truss Height Best Resolution Image. Total building width 2 30ft 2 15 ft. Start by deciding what you want your calculations to be based on.
Dividing the total width of the house by two will give us the distance required to reach the highest point of the truss. Take 12 the span and multiple it by the pitch. The lower height field is disabled but updates as the buyilding width andor heel height are changed.
Carpenters measure roof pitch as inches of rise per 12-inches of run.
The above diagram illustrates how the calculation is made. On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12-inch mark on the levels bottom straight down to the roof. Standard Heel Typical truss heel height is about 4. Finally you can find the roof pitch in the form of x12.