Let s consider a basic gable wood roof framing design.
Roxul in 2 x 10 roof joists.
Continuing on from part 3.
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Floor beam span tables of residential structural design we will now look at roof rafter and beam design.
Span calculator for wood joists and rafters also available for the android os.
The comfortbatt roof attic assembly shown from outside to inside shingles tar paper sheathing 2 x 10 roof trusses comfortbatt r30 r32 ceiling joists.
Here we have a wood framed gable roof.
Comfortbatt is a stone wool insulation product for use in wood and steel framing in both new residential and commercial builds and renovations.
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Joists and the top layer run in the opposite direction.
Also available for the android os.
For attics and cathedral ceilings only a single layer of comfortbatt is required between the roof trusses.
Roxul safe is ul and intertek approved as a forming material for numerous firestop systems.
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Working on putting the roxul insulation in the roof joists.
Roof trusses 103 sort by.
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For example in the rafter span table below the highlighted cell in the 40 live load table indicates that 2 x 8 southern yellow pine joists that have a grade of 2 that are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2.