How Much Roof Load Should I Figure For A Fire

Once the area is known divide by the area of a 4 8 sheet to find how much sheathing is needed.

How much roof load should i figure for a fire.

Load limits on the roof of a building. For dead loads you are correct. If you live in the us our snow load calculator compares the total weight on your roof with the permissible load calculated according to the standards issued by the american society of civil engineers regarding the minimum design loads for buildings and other structures asce7 16. In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing.

Find the area of a roof. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. I ignore the slope. To do this i use conservative too heavy dead loads and full snow loads regardless of pitch.

However in my practice i typically use the horizontal run of the roof for both types of load. Remember these loads are distributed uniformly over the entire surface of the roof. Technically you should use the actual rafter length when adding up the weight of roofing materials. To find the amount of plywood needed to cover a roof start by finding the area of the roof.

Roof pitch is a determining factor for cost of the roof as well as the roof area and the type of materials used. Roofs are under a lot of pressure.