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  1. syckoman

    What defines a "encased composite beam"

    CELinOttawa, yes I am aware of it being the owners problem, and they know it too. Basically it's an atom smasher research facility. The scientist came back and wanted to increase the soil fill above the tunnel from the agreed upon 125psf to 140psf, I believe due to radiation concerns.
  2. syckoman

    What defines a "encased composite beam"

    Thanks CELinOttawa and JedClampett, I was thinking it might had to do with the fire protection. In this case we have a tunnel with W36x302 (they vary in size) beams encased in 42" thick concrete slab. The reactions are roughly a shear of 550k and phiMn of 4800k-ft. The steel shops already have...
  3. syckoman

    What defines a "encased composite beam"

    Hello, I am graduate structural engineer helping out a senior structural engineer. We have a problem and can't seem to understand the reasoning for it. On a composite section, what dictates a "concrete encased beam". In the AISC 13th ed. it states "Beam totally encased in concrete cast...

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