The Gambrel Roof Framing Angles calculator will calculate the rafter lengths and angles for a Gambrel Roof and the angles for a Crow's Beak at the ridge line of the Gambrel Roof.
Input variables
- Gambrel Roof Span
- Gambrel Roof Rise
- Gambrel Main Roof Slope Angle
- Gambrel Wall Slope Angle
- Crow's Beak Rafter Run
- Crow's Beak Plan Angle
Gambrel Roof Span
Enter the total span of the roof, building width, for the Gambrel Roof.
Gambrel Roof Rise
Enter the total rise / height of the roof.
Gambrel Main Roof Slope Angle
Enter the upper / main rafter slope angle. It is normally about 30°.
Gambrel Wall Slope Angle
Enter the lower / wall rafter slope angle. It is normally about 60°.
Crow's Beak Rafter Run
This menu option allows you to set the run length of the crow's beak rafter.
Crow's Beak Plan Angle
This menu option allows you to set the plan angles of the crow's beak rafter. Usually, between 15° and 30°.
