The roof rafters provide integral structural support to the roof.
How to cut a shed roof rafter.
Mark and cut the seat and birdsmouth.
Mark and cut the first rafter ends.
The ridge end of the rafter and often the eve end will need to be cut to.
Here s a simple formula to help figure out the angle cut at the top of a shed roof when it lies on the main roof first you must know the pitch of the main roof and the porch or shed roof.
The ridge cut also called the plumb cut at the top of the rafter the birdsmouth cut which itself comprises 2 different cuts where the rafter meets the building s wall and the tail cut at the base of the rafter.
A common rafter has three basic parts you need to become familiar with.
This is the easy way to figure the angle to cut a porch roof rafter.
Make a set of.
Tail cut which may be cut plumb or square depending on how the eaves are detailed.
When you cut the rafters you ll need to make 3 separate cuts.
Birdsmouth which consists of two cuts a horizontal seat cut and a vertical shoulder cut.
Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter.