This will the first point of the rafter measurement line.
Roof framing match spacing.
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.
If the existing roof framing is a truss roof system complete structural calculations by a licensed engineer architect will be required.
Page 2 of 9 rev 12 14 09.
So the space between rafters can be greater without reducing the maximum span.
Patio cover section views rafter spacing header interior post post spacing see tables front view end post 4x4 min roof rafters see table bc end post 4x4 min rafter span.
In this how it works article managing editor debra judge silber explains the role of collar and rafter ties in the framing of a roof collar ties are necessary to prevent separation of the roof at the ridge due to wind uplift.
Roof area 49 69m rafters 14 rafter spacing 763 5 adjusted to fit evenly next larger spacing 827 1 next smaller 708 9.
The same concept holds true for roof trusses.
Measure down y height from the long point of the rafter cut and make a mark.
Training videos framing different roof sections with different rafter spacing training videos framing different roof sections with different rafter spacing.