Roof snow load nbc 2010 version 0 1 0 september 13 2020.
Ground snow load to roof snow load calculator.
Figure 7 1 pages 84 85 and table 7 1 page 92.
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 you have a density range then multiply the volume by each part of the range separately to find the minimum and maximum snow load.
Specified snow load.
Ground snow load pg.
S i s s s c b c w c s c a s r.
The flat roof snow load is calculated using formula 7 3 1.
To figure out the load on your roof take the depth of snow in feet and multiply it by the weight of a cubic foot of snow.
Horizontal distance from eave to ridge.
Each state has a listing of building code and applicable guidelines for snow loads as well as details about where the snow load information may be found or purchased.
The snow load calculations provided by this online tool are for educational and illustrative purposes only.
Snow load thickness density the result snow load or the pressure exerted by the snow has the units of kn m or lbs ft.
You might also be interested in our snow to water volume calculator.
In our case let s assume that our structure has a flat roof roof slope 5.
Other considerations for sloped roofs can be found throughout chapter 7 of asce 7 10.
Ft a minimum of 20 percent of the unreduced design snow load shall be included in the seismic dead load.
Rain load s r.
Length of high roof lu.
Ft snow loads may be excluded in the calculation of the seismic forces.
Asce 7 drift height calculation.
Ground snow load pg snow load design reductions under 2 000 feet no snow load n a between 2 000 and 3 500 feet 20 lbs sq.
Medeek design assumes no liability or loss for any designs presented and does not guarantee fitness for use.
Length of low roof ll.
Ground snow load s s.
Length of roof downwind of the snow drift.
From eave to ridge w.
Importance factor i s.
The purpose of this web site is to provide ground snow load analysis information and data gathered from all 50 states.
Snow weight length width cos pitch snow load the weight of snowis measured in kgor lbs.
Even when the specification is clear regarding ground snow vs.
Roof snow load and the applicable snow.
If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow.
Between 3 500 and 5 000 feet 40 lbs sq.
If the ground snow load isn t specified then a ground snow load needs to be assumed and the truss designer and the building designer may not be on the same page as it relates to this design assumption.
Calculate snow load the final step in calculating the snow load is to multiply the volume of snow on the roof by its density.
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