Hip Roof Rafter Cuts

Rick arnold frequent contributor to fine homebuilding and the journal of light construction presenter at jlc live the katz roadshow the remodeling show.

Hip roof rafter cuts. Purlin lip cut angle 11 4. The ridge cut also called the plumb cut at the top of the rafter the birdsmouth cut which itself comprises 2 different cuts where the rafter meets the building s wall and the tail cut at the base of the rafter. Http amzn to 2sfscbz swanson speed square http amzn to 2svgnvt 16 x 24 framing square starrett http amzn to 2sflm5v milwaukee circular saw http amzn. A seat cut is a horizontally level cut so the rafter can sit flat onto the wall plate.

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. A birds mouth is a combination of the two cuts made so the roof rafter sits tightly onto the wall plates square edge. This is the pointy end of. Also it has to be cut to form a point so to cut a hip raffter plumb cut you need to set the circular saw over so it will cut 45.

A cut on a rafter or other angled framing member that will be plumb vertically when the member is installed. The roof rafters provide integral structural support to the roof. Hip rafter length or line length. Measure back 25 from this line and mark a second parallel line on both sides of the hip.

The hip rafter plumb cut is a different angle to a common rafter plumb cut. Set circular saw blade tilt angle to 45 cut 1 side. Layout of ridge plumb and cheek cuts. When you cut the rafters you ll need to make 3 separate cuts.

With a square roof the ridge becomes a square center piece kingpost with side lengths equal to common rafter thickness. A plumb cut this is an angle to cut that will create a vertically plumb line on the rafter. Hip rafter plumb cut. Hip roof framing center join diagram with options for square roof 1.

First of 3 videos on hip rafter layout. Hip backing angle 15 4. Outside top plate edge to ridge top edge common 10 11 3 4. Mark the end plumb cut angle line 79 3 19 back from square on both sides of the hip.