Supporting MC/AC/BX

Discussion in 'Electrical Forum discussion & Blog' started by Ian Gills, Dec 18, 2007.

  1. Ian Gills

    Ian Gills Senior Robin Hood Guy

    Jul 24, 2007
    Robber, with some DIY on the side.
    I note in my house that while most of the AC has been pulled through small holes in the joists a significant section (4-5 feet) rests directly on top of the furnace duct work which hangs slightly below the joists above. Is it allowed to suport AC on ductwork like this?
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