Birds Mouth Cut Calculator
Calculate Birds Mouth Cut Dimensions
About Birds Mouth Cut
A birds mouth cut is a notch cut into the bottom of a rafter to allow it to sit properly on the wall plate.
Purpose:
- Provides proper seating on wall plate
- Distributes load evenly
- Prevents rafter from sliding
- Creates clean, professional appearance
Key Measurements:
- Seat Cut: Horizontal cut depth
- Heel Cut: Vertical cut depth
- Cut Angle: Angle of the notch
- Remaining Depth: Uncut portion
Safety Guidelines:
- Never cut more than 1/3 of rafter depth
- Maintain structural integrity
- Use proper cutting tools
- Follow local building codes
Common Applications:
• Residential roof construction
• Shed construction
• Gazebo building
• Pergola construction
• Deck construction
Tools Required:
• Circular saw or handsaw
• Speed square
• Pencil for marking
• Measuring tape
• Safety equipment
Proper birds mouth cuts ensure structural stability and professional appearance in roof construction projects.