9 Best Of How To Cut Rafters Best Wallpaper JPG. Check the board for crown--any slight curve in the length--and designate the outside of the crown as the top side of the rafter. Birdsmouth which consists of two cuts a horizontal seat cut and a vertical shoulder cut.
Other Things To. Mark the top or plumb cut first. Mar 13 2017 A common rafter has three basic parts you need to become familiar with.
Birdsmouth which consists of two cuts a horizontal seat cut and a vertical shoulder cut.
With your carpenters square draw a straight line between the two points you just marked. Lay a set of rafters down on the floor and align them to where they would sit on the walls if the walls were already there. Get some scrap 24 pieces. Rafters should always be cut and installed with the crown up.