Structural roof loading conditions incorporate a flat roof snow load of 22 PSF spanning a thirty-foot drift width. The drift tapers down from a peak load of 153 PSF at the face of the wall at the roof level. Dimensions indicate a thirty-foot horizontal extent from the wall face.
ROOF LEVEL FACE OF WALL 118 PSF FLAT ROOF SNOW LOAD = 22 PSF SNOW DRIFT DIAGRAM #1 22'-0" ROOF LEVEL FACE OF WALL 153 PSF FLAT ROOF SNOW LOAD = 22 PSF SNOW DRIFT DIAGRAM #2 30'-0"
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