A distinction is made between single shell and double shell roofs.
Roof framing layout.
This will the first point of the rafter measurement line.
Measure down y height from the long point of the rafter cut and make a mark.
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.
Choose the design of the roofing trusses.
If you want to frame a roof you ve got two important choices to make in terms of design.
Designing the roof 1.
Add the length of the overhang beyond this mark and.
Marking the birdsmouth and the ridge board setback.
This video explains in detail how to build a hip roof.
Choose a style of roof.
The roof frame work mainly consists of purlins inferior purlin central purlin and ridge purlin ridge collar rafter and roofing battens.
Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge.
Understand the different measurements.
Flip the square over and place the tongue along the line made in illustration b.
Position the square at the end of the rafter board with the tongue on your left and facing away from you.