Common Rafter & Birdsmouth Solver

IRC R802 Compliant
True Line Length -- Plumb to Plumb
Total Overall Length -- Including Overhang
Total Rise -- Top plate to ridge
Birdsmouth Seat Cut 3-1/2″ Full 2×4 bearing
Parametric Rafter Cut Geometry
Max allowable notch depth: 1/4 of rafter depth (IRC R802.7.1)