Revit Birdmouth Cut Roof

Determine the depth of the birdsmouth cut.

Revit birdmouth cut roof. To create the desired cut you can use an in place void family on the high roof. This new line marks the horizontal cut for the bird s mouth. Tutorial on roof construction modeling in revit. For most buildings the birdsmouth cut is 4 inches 10 cm deep.

Measure the full width of the outside wall. In my photo above the green rafter line length is from the plumb cut face or ridge board face to the plumb cut face of the bird s mouth notch. This is relatively simple. Get these project files and all advanced 1h courses.

Solution by design only roof edges that are slope defining are affected by the rafter cut. Architecture tabopening panel structure tabopening panel use the by face option when you want the. Draw a line at right angles to the bird s mouth plumb cut starting 3 inches up from the bottom of the rafter but no more than half the thickness of the rafter. Use a square placing one side against the plumb cut line.

You created a roof that has only one slope defining side. The birdsmouth joint also called the birds beak cut or birds beak joint is a small triangular shaped cut out at the base of a roofing joist that allows the joist to sit nicely on top of the wall plate top of the wall before the roof starts. Click by face or vertical. When you placed fascia and set the rafter cut of the roof to two cut plumb or two cut square in the roof properties only the slope defining edge was affected.

You can cut openings in the faces of these elements or you can select the entire element to make a vertical cut.