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Re: Floor Vibrations

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Back in the early 1960's an almost identical problem evolved at a
shopping center in the Kansas City.  Murray developed a solution using
concrete weights suspended from springs that were hung within the joist
space.  The problem was solved.

I do not know the specifics of the solution, but a solution using
Murray's approach and a system of tuned mass dampers should do the

Good luck,
Harold Sprague
Black & Veatch
From: chris towne
To: seaoc(--nospam--at)
Subject: Re: Floor Vibrations
Date: Wednesday, August 06, 1997 7:16PM

The building is steel frame and the problem area is steel joists on
concrete slab.  The joists are 24 feet long and are spaced at 30".  The
slab is 2.5" deep.