Roof Frame Wood

Line up the square with the plumb line then rotate it 180 degrees realigning the square on the other side of the.

Roof frame wood.

In a typical roof framed with dimension lumber the rafters rest on the exterior wall top plate at the lower end and bear against a ridge board at the top. Line length is the hyptenuse of the triangle whose. Add the length of the overhang beyond this mark and. Figure 2 2 roof framing terms.

The rafters are usually positioned directly above the wall studs. If the unit of rise in inches is 3 then the cut is the unit of rise and the unit of run 12 inches or 3 12. This process uses pre built wood forms to build the roof frame. Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge.

Stick framing combines roof rafters with ceiling joists. Most roofs utilize 16 inch spacings for strength and rigidity. Conventional framing the first thing to understand is how a roof framed with wood i joists differs structurally from a traditional stick framed roof. Measure your seat cuts.

Like wall studs and floor joists rafters and trusses are spaced every 16 or 24 inches from center to center. Position the square at the end of the rafter board with the tongue on your left and facing away from you. While you re at it some carpenters. No matter which kind of roof framing is used they both contain one element that you ll need to be familiar with and that s the pitch of the roof.

My purpose here is to clarify the differences between solid lumber and wood i joists and to provide some hints to make roof framing with wood i joists easier. You should be able.