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.
Snow load gable roof equation.
P f flat roof snow load in psf c e exposure factor as determined by asce table 7 2 below.
The result snow load or the pressure exerted by the snow has the units of kn m or lbs ft.
Determine ground snow load based on location and elevation calculate flat roof snow load p f using the following equation.
P f 0 7c e c t i s p g where.
The weight of snowis measured in kgor lbs.
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.
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.
Flat roof snow load are determined by the following method.
P f 0 7c e c t i p g.
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.
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.
Number of footings 16 footings piers therefore provide 8 piers per side of the manufactured home pier spacing 8 6 ft the maximum spacing of the piers is set to 8 feet to provide effective floodborne debris protec tion.
But not less than the following minimum values for low slope roofs.
Snow load calculations for most residential structures are usually performed using the following method.
Snow load thickness density.
Individual footing area 24 in x 24 in 4 ft2.
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.
Partial unbalanced and drift loading.
This includes overhangs and multiple roof levels.
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.
The following are the equation for determining snow loaing on flat roofs.
The balanced snow load is applied everywhere where the roof structure is located.
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.
