Most roof framing is 24 on center and you can still build sheds up to 14 with 2 4 rafters at 24 on center.
Roof width load.
Roof live loads need not be applied to the area covered by photovoltaic panels where the clear space between the panels and the roof surface is 24 inches 610 mm or less.
For heavy loads 2x4s can span up to 5.
Applicable uniform and concentrated roof loads with the photovoltaic panel system dead loads.
The distance in this case is 12 ft 2 ft 14 ft.
2 4 rafters can span up to 7.
Spacing your 2 4 shed rafters at 24 on center limits the width of your roof.
Multiply the load per square foot by the total area of the roof.
This video looks at roof load width rlw.
Multiplied by 40 pounds per square foot equals 8 000 pounds.
For light load roofs 24 o c.
Rlw is used to calculate the sectional size of some roof members and supporting wall.
Roofs are under a lot of pressure.
So each lineal foot of wall must carry the loads imposed by a 1 foot wide strip in that 14 ft region.
If an example roof is 10 feet by 20 feet the total area is 200 square feet.
In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing.
Load limits on the roof of a building.