Find the rafter length needed by consulting the rafter table inside of therafter angle square manual. Returning to our example, a 5/12 inch rafter has a length of 13 inches. Find the birdsmouth joint. Back to top If you’re in need of more tool use information, stop by the guide of...
If you’re using larger dimensional lumber for the trusses or rafters, you may need to make a birdsmouth cut on the rafters, especially if installing the tie on the inside of the wall. Save A birdsmouth cut is a small notch cut out of the rafter that accounts for the pitch of the r...
You mark plumb cut lines by turning the square on the pivot point, and lining up the “common” number with the edge of the rafter. These numbers represent the pitch of the roof, which will be referred to as “X” on 12, with “X” being the number of inches the roof rises over ...
While the person on the scaffold plank balances the first two opposing rafters, the other can fix the birds-mouth (see drawing above) end of the rafters to the beam, central over the post. Once the rafter is nailed in place, attach an angle clip for added strength on top of the beam...
I like to remember that because if I don't, when I make my birds-mouth cut, the whole rafter, IF I keep the slope unchanged, drops vertically by that same amount, 1.5" - so the top of the ridge drops the same amount. If you forget this detail then either the slope turns out to...
This is a closeup of the birdsmouth. The small spacer accounts for the gap required to accommodate the siding. You can also see the 6″ overhang, and that they cut the tail end of the rafter for the soffits. Next, the crew moved on to the hip rafters. You can see how the birds...
Framing Square Test & Repair How to check and fix a framing square that's not a perfect 90° If your square cuts are inconsistent or not square, here you will find the causes and cures for that aggravation.
You mark plumb cut lines by turning the square on the pivot point, and lining up the “common” number with the edge of the rafter. These numbers represent the pitch of the roof, which will be referred to as “X” on 12, with “X” being the number of inches the roof rises over ...