How To Over Framing Roof

Stick truss roof framing.

How to over framing roof.

Line up the square with the pitch end of the chord and mark the line with a pencil. Standard stick framing or the newer truss framing. Figure 2 2 roof framing terms. Measure down y height from the long point of the rafter cut and make a mark.

To provide a framework for the new trusses nail 2 by 6 inch strips of wood around the perimeter of the roof. Some carpenters like to make this. This process uses pre built wood forms to build the roof frame. This will the first point of the rafter measurement line.

Make a simple rafter jig if the slope of your dormer roof is the same as your old roof hold a scrap of plywood against the old roof boards and draw a level line on it. Measure out each plumb cut. Input the pitch of the roof that you calculated above we ll use 7 12 for reference throughout on the framing square. Position the square at the end of the rafter board with the tongue on your left and facing away from you.

Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge. 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. Nearly all roofs are framed using one of two methods. Over framing is when you frame a roof section on top of another roof section such as when joining a l shaped roof with each section at right angles to each other etc.

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. Below is a link to a roof plan with a section that is over framed see note 3. Roof framing rafter layout. Add the length of the overhang beyond this mark and.

Roof framing can be simple or complex depending on the roof. The pitch of the roof refers to the angle or steepness of the roofing frame. Make a rafter cutting jig by measuring 12 in. From one end of the rafter material using a speed square or framing square mark an x in 12 angle on the rafter and cut it.

This will give the framing square the angle you need to make the ridge cut. So if the pitch of your roof is 7 12 place one stair gauge on the vertical part of the framing square the tongue at the 7 inches 18 cm mark and place one stair gauge on the horizontal part of the framing square the body at the 12 inches 30 cm mark. Overhangs hips and dormers add greatly to the complexity of the framing. Along the level line and using a square to draw a perpendicular line up to the roof edge of the board.