Roof Load Width Explained

This zone accounts for about 5 of the roof surface represented the corners of the roof.

Roof load width explained.

The span would be 11 5 3 4. Trusses struts and props. The roof of a house can t do its job if it doesn t remain where it s supposed to be and a variety of forces are always at work trying to make the roof fail to stay in. This downward imposed load on the home is also known as the snow 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. House roof framing loads. 2 you must determine the snow load for your region. Load limits on the roof of a building.

So consider a simple gable roof on a 24 foot wide ranch framed with 2 6 exterior walls and a 1 1 2 ridge. Used for roof overhang area along the perimeter of zone 3. The north zone middle zone and the south zone are identified on the roof load zone map above. Roof load width rlw and floor load width flw can be determined from as1684 or from the images below.

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. The snow load is treated as a live load when you use af pa s tables. These diagrams may also be used to determine roof load width for floor joists.

Used for roof overhang area along the perimeter of zone 2. Spacing should be interpreted as the centre to centre distance between adjacent parallel members. The entire roof load is supported by load bearing walls which in turn transfer weight to the foundations of your home. This information is found in the code book.

Roof pitch refers to the amount of rise a roof has compared to the horizontal measurement of the roof called the run. Any areas between the wall corners that are not included within zone 5.