Roof Width Load

This is the sixth video in the series on the timber framing code.

Roof width load.

In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing. Multiply the load per square foot by the total area of the roof. For heavy loads 2x4s can span up to 5. Load limits on the roof of a building.

2 4 rafters can span up to 7. For light load roofs 24 o c. So each lineal foot of wall must carry the loads imposed by a 1 foot wide strip in that 14 ft region. Multiplied by 40 pounds per square foot equals 8 000 pounds.

Spacing your 2 4 shed rafters at 24 on center limits the width of your roof. 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. This video looks at roof load width rlw. The exterior wall and the headers within will carry all loads from the mid point of the house between the supporting walls to the outside of the house including the roof overhang.

If an example roof is 10 feet by 20 feet the total area is 200 square feet. The distance in this case is 12 ft 2 ft 14 ft. Rlw is used to calculate the sectional size of some roof members and supporting wall. This number represents the total load that your roof must carry.