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- To: <seaint(--nospam--at)seaint.org>
- Subject: Floor Boxes
- From: "Mike Zaitz" <mzaitz(--nospam--at)hgbd.com>
- Date: Tue, 28 Jan 2003 17:34:39 -0500
Looking into a
problem that has appeared. I have a concrete slab on 9/16" form deck (3"
total thickness) on bar joists at 24" o.c. The Electrical Engineer has
informed me that he is required to use floor boxes (http://www.fsrinc.com/ see model
FL-500P) for electrical. These boxes are approximately 12"x10" in
plan and 4" deep. The support steel is already designed and I am trying to
find a cost effective solution for these boxes that will now penetrate my floor
without adding a large amount of weight (aka increasing slab thickness).
Fire protection is not an issue per the architect. An idea that has been
tossed around is to use a typical 14 ga sump pan that will be used as a form and
reinforce it with rebar. I do not see how this issue has not come up but
all my searching has been for naught. Is typical practice to increase the
thickness of the slab for floor boxes?