Roof Load Width Explained

Load limits on the roof of a building.

Roof load width explained.

Roofs are under a lot of pressure. Spacing should be interpreted as the centre to centre distance between adjacent parallel members. Any areas between the wall corners that are not included within zone 5. These diagrams may also be used to determine roof load width for floor joists.

The north zone middle zone and the south zone are identified on the roof load zone map above. Used for roof overhang area along the perimeter of zone 3. Used for roof overhang area along the perimeter of zone 2. The dead load on a roof includes the framing sheathing and roofing material along with any other permanent construction that rests directly on the roof and transmits its weight load through the.

In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing. The span would be 11 5 3 4. 2 you must determine the snow load for your region. The entire roof load is supported by load bearing walls which in turn transfer weight to the foundations of your home.

So consider a simple gable roof on a 24 foot wide ranch framed with 2 6 exterior walls and a 1 1 2 ridge. Trusses struts and props. This information is found in the code book. This downward imposed load on the home is also known as the snow load.

Roof pitch refers to the amount of rise a roof has compared to the horizontal measurement of the roof called the run. This zone accounts for about 5 of the roof surface represented the corners of the roof. The north zone design live load equates to 40 pounds per square foot the middle zone equates to 30 pounds per square foot and the south zone equates to 20 pounds per square foot. Has the highest load.

To see how pitch impacts the look of a garage and changes cost click the design center button on our pole barn kits page.