Minimum Roof Snow Load

In our case let s assume that our structure has a flat roof roof slope 5.

Minimum roof snow load.

The maximum snow load of your roof depends on several factors but the average roof can support about 20 pounds of snow per square inch. Calculate the snow loads based off chapter 7 of asce 7. If they are less than the minimum of table 1608 1 then use the minimum of 30psf. Brussels 18 20 february 2008 dissemination of information workshop 18.

There seem to be two conflicting interpretations out there regarding minimum snow loads as defined in asce 7 98. Pg ground snow load pf flat roof snow load pg i ce ct ps sloped roof snow load pf cs the minimum pf is defined in asce 7 98 as. You can enter this value either as a ratio x 12 or as an angle whichever suits you better. I pg when pg is less than or equal to 20psf i 20 when pg is greater than 20psf.

However some areas of the u s. Paolo formichi university of pisa italy. Guide to the snow load provisions of asce 7 10. Roof snow load is defined as the weight of snow on the roof surface used in design of the building structure ibc 2012.

Other considerations for sloped roofs can be found throughout chapter 7 of asce 7 10. Intuitively this is the number of inches of snow on your roof in the place where the cover is the thickest. The flat roof snow load is calculated using formula 7 3 1. That are prone to lots of snow may have roofs that support a heavier snow load.

The snow load that is applied to our structure is not the ground snow load but in most cases the flat roof snow load. If the roof holds more weight than this it can cause damage. The snow load on the roof is derived from the snow load on the ground multiplying by appropriate conversion factors shape thermal and exposure coefficients. It is determined based.

Table 1608 1 minimum flat roof snow load pf 30psf there is an argument in my office on how to interpret the section of the code.