ASCE 7 states that drifting does not need to be considered if the projection is less than 15 feet. How close can these 15ft projections be to each other? 15 ft, 2 ft, 1/2 inch? If the projection is 13'-4" would 5ft bee OK?
Also if you lift a projection off of the roof will drit loading be negated? how high? height of snow, heigth of drift, or even higher?
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