5 Best Of How To Measure Angles For Rafters Best Wallpaper JPG. If they are not then click here for the unlevel wall rafter calculator. Set Unit Run - Place the other square gauge at the run unit measurement mark.
If you are calculating rafter length from the center of the ridge beam as shown below you will need to subtract half of the thickness of the ridge beam from the top end of the rafter. The straight edge is where the pivot point begins and where you will compute and determine angles. It is important to note that the angle you need to find is actually the complement of the angle you need.
For example if the ridge beam is 15 inches thick subtract 34 of an inch from the overall rafter length.
How to measure or figure rafter length and mark and cut them accurately. Using a speed square for measuring angle cuts for shed trusses. The straight edge is where the pivot point begins and where you will compute and determine angles. I have watched some youtube videos and read up on speed squares and roof angles etc.