Roof Framing Layout

Measure up a distance equal to 25 of the width of the rafter as shown in illustration c and put a mark.

Roof framing layout.

Position the square at the end of the rafter board with the tongue on your left and facing away from you. A distinction is made between single shell and double shell roofs. If you want to frame a roof you ve got two important choices to make in terms of design. Roof framing rafter layout 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.

Add the length of the overhang beyond this mark and. The roof frame work mainly consists of purlins inferior purlin central purlin and ridge purlin ridge collar rafter and roofing battens. Choose the design of the roofing trusses. Draw a line down the edge of the tongue as shown in illustration b of the roof layout.

The framing style of the roof refers to the actual components of each. This video explains in detail how to build a hip roof. Flip the square over and place the tongue along the line made in illustration b. This will the first point of the rafter measurement line.

Designing the roof 1. Choose a style of roof. Marking the birdsmouth and the ridge board setback. Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge.