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  1. iain98765

    Prestressed beam weight for crane lifting - a practical or theoretical approach?

    Hi there, I'm in a bit of a dilemma. Two arguments for the self weight of a beam. 1. to take a standard 2500kg/m^3 for the beam as (unit weight)which would include for the steel. for a beam with theoretical volume of 20m^3 so 2500*20/1000 = 50tons or 2. take the cylinder tested density of...

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