It goes without saying that in a warmer climate the snow load probably would be less so you need to check your code book for live loads and dead loads in your region.
Snow load gable roof equation.
The snow load p f on a roof with a slope equal to or less than 5 degrees 1 in ft 4 76 deg shall be calculated in lb ft 2 kn m 2 using the following formula.
All loads are listed as pounds per square foot of.
But not less than the following minimum values for low slope roofs.
P f 0 7c e c t i s p g where.
The weight of snowis measured in kgor lbs.
P f 0 7c e c t i p g.
Minimum values of pf shall apply to monoslope roofs with slopes 15 degrees and gable and hip roofs with slopes less than the larger of 2 38o and 70 w 0 5 where w horizontal distance from eave to ridge in feet.
Snow load calculations for most residential structures are usually performed using the following method.
The result snow load or the pressure exerted by the snow has the units of kn m or lbs ft.
Our sample homes are in an area where the snow load is 50 pounds per square foot of roof area treat snow as live load.
After you obtain the roof slope factor from those sections in asce 7 10 the balanced design snow load for the sloped roof can easily be calculated using equation 7 4 1.
This includes overhangs and multiple roof levels.
P f flat roof snow load in psf c e exposure factor as determined by asce table 7 2 below.
The sloped roof snow load p s shall be obtained by multiplying the flat roof snow load p f by the roof slope factor c s.
Determine ground snow load based on location and elevation calculate flat roof snow load p f using the following equation.
Individual footing area 24 in x 24 in 4 ft2.
Partial unbalanced and drift loading.
P g ground snow load l u length of upper roof l l length of lower roof h d height of snow drift w width of snow drift h b height of balanced snow load h c clear height from top of balanced snow load to closest point of adjacent roof h r height difference between roofs.
The balanced snow load is applied everywhere where the roof structure is located.
Sliding load on adjacent roof ponding faq s 3 minimum roof snow load clarification scenario roof load right after heavy snow w o wind no time for thermal no wind roof load p r p g 4 minimum roof snow load p m i s p g p g 20 psf p m 20 i s p g 20 psf the 20 psf value is our estimate of the maximum size of a single heavy snow storm 5 minimum roof snow load.
Flat roof snow load are determined by the following method.
P s c s p f the thermal factor c t from table e 3 determines if a roof is cold or warm slippery surface values shall be used only where the roof s surface is unobstructed and sufficient space is available below the eaves to accept all the sliding snow.
Snow weight length width cos pitch snow load.
