Square cut or plumb cut.
Plumb cut roof.
The number of rafters needed will be determined by the length of your roof.
The top cut face of a rafter that is designed to butt vertically against a ridgeboard.
Determine a thickness for the ridge and use the drop down to select it.
At this point you ve cut 1 roof rafter.
Plumb cut typically called the ridge cut at the top end of the rafter.
In the drawing area select the roof.
Plumb cut definition is a cut in a vertical plane.
Select straight clear stock for the barge rafters and start with a board that s a little longer than you need.
Select a roof pitch.
Wall thick wall height allow for ridge thickness when determining rafter run to outer wall.
How to plumb cut rafter tails.
Locate these rafter terms in the illustration below.
Roof angle overhang level rafter depth rafter thick birds mouth plumb birds mouth seat.
Depending on the size of your structure you will need to cut several or many more.
On the properties palette for rafter cut select plumb cut two cut plumb or two cut square.
The length of the rafter is given from the long point of the ridge cut at the top down along the top edge the board to the same plumb cut on the rafter s notch.
For two cut plumb and two cut square specify a value for fascia depth between zero and the thickness of the roof.
Roof pitch is measured in a rise to run ratio with the vertical rise always shown first.
The results are automatically fired as soon as any of the values are entered or altered.
All roof rafters should be identical so follow the same steps to measure the plumb cut tail cut and birdsmouth cut.
Birdsmouth which consists of two cuts a horizontal seat cut and a vertical shoulder cut.
Some architectural designs call for plumb or vertical cuts as opposed.
Print full scale rafter plumb cut templates and birdsmouth templates.
Sawyers are the folks who operate the component saws which precision hopefully cut all of the components prior to assembly.
Tail cut which may be cut plumb or square depending on how the eaves are detailed.
The traditional method has been rise inches 12 run inches.
This is a mitered plumb cut 4 in 12 on this roof if you re working with finished trim.
After creating a roof change the style of the eaves by specifying the rafter cut.
Back in the 70 s when i first entered the prefabricated metal connector plated wood truss industry i was a sawyer.
So if your roof is a 45 degree angle that is for every 12 along the horizontal run it rises 12 it s a 12 12 pitch.
