Determine Pitch of a Roof = Find the slope of a line
Given the run of the roof and the total rise determine the roof pitch of a shed roof.
T-Chart Carpentry 46.0201 m11d321 Compute slope.docx
Pitch and slope are very similar. They both represent rise divided by run.
There are three major differences between pitch and slope:
- Pitch is always positive whereas slope can be both negative and positive.
- Slope requires you to find the rise and run by subtracting the y and x values while the rise and run for pitch are given.
- The answers are written differently. For pitch, you divide the rise in inches by the run in feet, take your answer and put a -12 after it to get a 2-12, 4-12 pitch. For slope, you reduce the fraction so 2-12 would really be 1/6, and 4-12 would really be 1/3.