Tail cut which may be cut plumb or square depending on how the eaves are detailed.
Plumb cut roofing.
The top cut face of a rafter that is designed to butt vertically against a ridgeboard.
Locate these rafter terms in the illustration below.
Drawings by the author.
Read more about roof design.
In this diy guide you will learn how to install a roofing joist or rafter that includes how to work out the pitch of a roof cut a ridge or plumb cut at the correct angle work out the correct length of joist you need and the exact location for a birds mouth joint how to correctly cut a birds.
Architectural elements to use and avoid.
Roof pitch is measured in a rise to run ratio with the vertical rise always shown first.
The number of rafters needed will be determined by the length of your roof.
Plumb cut definition is a cut in a vertical plane.
When framing a gable or hip roof the final step is cutting the rafter tails for fascia board.
Some architectural designs call for plumb or vertical cuts as opposed.
Here the birdsmouth plumb is 76 37 inches.
After creating a roof change the style of the eaves by specifying the rafter cut.
Plumb cut typically called the ridge cut at the top end of the rafter.
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.
Plumb cut eaves are perpendicular to the ground while square cut eaves are perpendicular to the angle of the roof.
In the drawing area select the roof.
If it rises onlyread more.
Marianne cusato is the author of get your house right.
Determine a thickness for the ridge and use the drop down to select it.
Birdsmouth joint how to cut a birdsmouth and how to cut and install roofing rafters and joists.
The actual indentation or cut is known as the birdsmouth while the birdsmouth plumb is the depth of the cut out.
Birdsmouth which consists of two cuts a horizontal seat cut and a vertical shoulder cut.
The results are automatically fired as soon as any of the values are entered or altered.
Depending on the size of your structure you will need to cut several or many more.
At this point you ve cut 1 roof rafter.
On the properties palette for rafter cut select plumb cut two cut plumb or two cut square.
Select a roof pitch.
For two cut plumb and two cut square specify a value for fascia depth between zero and the thickness of the roof.
How to plumb cut rafter tails.
Designing the right roof rake.
The traditional method has been rise inches 12 run inches.
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.
