In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing.
Roof load width explained.
Used for roof overhang area along the perimeter of zone 3.
The snow load is treated as a live load when you use af pa s tables.
Most commonly the roof s internal support structure is composed of a fairly complicated system of structural elements designed to manage the load from the roof.
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 information is found in the code book.
Roofs are under a lot of pressure.
Has the highest load.
This zone accounts for about 5 of the roof surface represented the corners of the roof.
The span would be 11 5 3 4.
Spacing should be interpreted as the centre to centre distance between adjacent parallel members.
The north zone middle zone and the south zone are identified on the roof load zone map above.
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.
Load limits on the roof of a building.
House roof framing loads.
Roof load width rlw and floor load width flw can be determined from as1684 or from the images below.
2 you must determine the snow load for your region.
Any areas between the wall corners that are not included within zone 5.
Used for roof overhang area along the perimeter of zone 2.
These diagrams may also be used to determine roof load width for floor joists.
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.
