Collar ties may take up space in the attic of your home but they are there for a reason.
Roof framing match spacing.
Measure down y height from the long point of the rafter cut and make a mark.
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.
Roof area 49 69m rafters 14 rafter spacing 763 5 adjusted to fit evenly next larger spacing 827 1 next smaller 708 9.
If the existing roof framing is a truss roof system complete structural calculations by a licensed engineer architect will be required.
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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.
This will the first point of the rafter measurement line.
So the space between rafters can be greater without reducing the maximum span.
Common spacing for trusses on this type of building is often between 2 and 4 feet but trusses built with advanced designs may allow spacing as great as 8 or 12 feet.
The same concept holds true for roof trusses.