A common rafter has three basic parts you need to become familiar with.
How do you cut a roof rafter.
How to build shed roof rafters step 1.
Mark and cut the seat and birdsmouth.
Mark the plumb cut at the top of the rafter.
Rick arnold frequent contributor to fine homebuilding and the journal of light construction presenter at jlc live the katz roadshow the remodeling show.
Set the framing square on top of the rafter beam with the tongue facing the top of the rafter.
Mark and cut the first rafter ends.
Once you located where the mark falls on the 2 x 10 measure the distance and be sure to add 10 for the overhang.
In this video you will learn all about common rafters.
Calculate pitch of roof use roof pitch to cut ridge cut use ridge cut as point of reference to form birdsmouth make tail cut.
Tail cut which may be cut plumb or square depending on how the eaves are detailed.
Choose which end of your rafter you want to be the top.
How to measure or figure rafter length and mark and cut them accurately.
This video will show you how to figure length and cut a common rafter for a gable roof using a framing square.
Plumb cut typically called the ridge cut at the top end of the rafter.
The ridge end of the rafter and often the eve end will need to be cut to.
The plumb or ridge cut is made at the top of the rafter.
So to summarise the full process is as follows.
Cut one end of each 2 x 8 rafter to get the necessary length desired.
The vertical cut is called the birdsmouth and the horizontal cut is called.