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ice loads on horizontal pipe above roof

ice loads on horizontal pipe above roof

ice loads on horizontal pipe above roof

(OP)
When figuring the ice load on a pipe that is running horizontaly over a flat roof sould the z elevation be taken from grade or the top of the roof?

RE: ice loads on horizontal pipe above roof

Please provide a sketch of your problem, and of your variable z.   As phrased, it can not be accurately answered.    

RE: ice loads on horizontal pipe above roof

Since the definition for z = height above ground in ft, I would use 32' and not 2'.

RE: ice loads on horizontal pipe above roof

YES!!  But it shouldn't matter much

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