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Re: Grouting the base plates

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Totally forget the dry pack.  It is very labor intensive and rarely done correctly.  To do it right normally takes three workers, one doing the mixing, one holding a rod with end plate, and another pushing the stuff in and rodding against the other guy's end plate.  If you have a lot of base plates to do (such as in a building with many columns) you can form and pour pre-packaged grout in a fraction of the time and come out with a much better installation.

Thomas Hunt, S.E.
ABS Consulting

"Reza Dashti" <rezadashti(--nospam--at)>

02/21/2003 10:56 AM
Please respond to seaint

        To:        <seaint(--nospam--at)>
        Subject:        Grouting the base plates


It has been my understanding that dry pack grouting is used when you have a
gap of 1-1/2" or more under the base plates and that fluid grouts are used
for 1/2"<gap<=1-1/2" . In a current job with roof steel columns supported by
a concrete elevated slab,we have 10"x10" base plates (typ.) with 3"x3" shim
plates in the center of base plates used during the installation of columns.
Gaps are 3/4" to 1-1/2". Is there anyway to use dry pack (or similar) and
avoid fluid grout ? (to avoide forming around the base plate and using head

Reza Dashti P.Eng.
Vancouver, BC