9 Best Of How To Measure And Cut Rafters New Update 2021. Oct 23 2019 Calculate the span of your center common rafters. Measure and Mark Plumb Cut Use the square root figure to measure along the top of the rafter.
The calculation sequence to find rafter length on a Construction Master is shown below. If you are doing 16 OC then start in from the front edge of your top plate where your first rafter is going to sit. Using this figure measure and mark two points on each side of the vertical line which indicates where the birdsmouth will be cut.
Go until you get to the end.
If you are doing 16 OC then start in from the front edge of your top plate where your first rafter is going to sit. Oct 23 2019 Calculate the span of your center common rafters. This ensures that you make the birdsmouth cut at the right length in the rafter. Then divide this number by 2 to reflect the separate halves of the roof.