Topic Thread

  • 1.  RE: Grout Bases for Columns

    Posted 6 days ago

    Only a few columns on this job are subject to net uplift.  In any event, the top AB connections are fine for uplift; our concern is that the column is unsupported below the base plate, in the typical cases of net downwards loading.  We did consider the possibility that the braces are taking more of the gravity load than they're meant to, but the line containing three hovering columns (see my most recent comment) does not have any braces, so this would not explain the worst cases.  As for the possibility that the they are awaiting final adjustment for some other erection milestone, this does not appear to be the case as neither the GC nor the concrete sub even believed that there was a gap until we stuck a 1/8" feeler gauge in it.

    Christian Parker EIT,A.M.ASCE
    Structural Project Engineer
    Washington DC
    (202)628-1600 EXT 190