Length of low roof ll.
Snow load gable roof.
One reason may be that the current unbalanced snow load provisions for gable roofs is much higher then what was required by some codes in the past.
P s c s p f where.
In practice i found when a building only has a single valley on one side of the roof the unbalanced snow ussually governs.
Pounds snow load on a sloping roof is the same as the total snow load on a horizontal roof of length equal to the horizontal projection of the sloping roof.
Horizontal distance from eave to ridge.
When the roof slope is greater than 5 the roof is considered sloped.
Sloped roof snow loads are assumed to be acting on the horizontal projection of the surface.
Length of roof upwind of the snow drift.
Figure 7 1 pages 84 85 and table 7 1 page 92.
Hipped roofs are often used in complex roof formations with the hips facing different.
With overhanging eaves feature four medium pitched sides and are characteristic of dutch architecture and help disperse snow loads in northern climates.
Depending on your region you may need to design for a maximum snow load of anything between zero to 65 pounds per square foot or roughly 0 3 kpa.
For hip and gable roofs with slope exceeding 7 on 12 30 2ยบ unbalanced snow loads are not required to be applied 15 unbalanced loads gable roof upper limit roof slope lower limit roof slope small eave to ridge distance 16 unbalanced lower limit slope in 7 05 lower limit was complicated slopes less than larger of 70 w 0 5 and 1 2 on 12.
Multiply loads such as 20 pounds per square foot by the square footage of the roof.
Snow accumulation requirements must be detailed by the building designer.
Roof slope factor c s.
Framing table for maximum roof rafter spans.
2 apply dead load using the weight of framing material roof covering and fixed elements of the gable roof.
Does this mean that if i have a gable roof sloping at say 25 degrees i e the 30 degree minimum slope where snow load can start to be reduced due to sliding that the total i e.
Let s look at the sample table below which shows maximum rafter spans for a snow load of 31 3 pounds per square foot psf.
From eave to ridge w.
Length of roof downwind of the snow drift.
C s roof slope factor p f flat roof snow load.
Length of high roof lu.
Ground snow load pg.
Snow accumalates in valleys and may be a major design concern.
The sloped roof snow load is calculated using equation 7 4 1.
