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Re: Flat Slabs

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What set the pile spacing?  I would think that you would want to mnimize the
cost by reducing the number of piles needed and therefore set the pile
spacing as large as possible without overloading the piles.  Using rough
numbers, you would have service load pile reactions of approximately 1000
psf * (12.5')^2  + 7 kips = 82 tons.  Do you have any information on what
your allowable pile capacity is?

I agree with prior posts about eliminating the drop panels.

M. David Finley, P.E.
Lake City, FL  32025


----- Original Message -----
From: "Michael Zaitz" <mzaitz(--nospam--at)hgbd.com>
To: "Structural Engineers Association" <seaint(--nospam--at)seaint.org>
Sent: Thursday, September 20, 2001 3:00 PM
Subject: Flat Slabs


> Hello all;
>
> We are looking at a preliminary design for a flat slab floor (at grade)
> supported by precast piles at 12'-6" o.c. each way.  The floor must
> support a 800 psf live load.  We also have a forklift carrying a 7000
> lbs roll of paper (trying to get more information on this).  They have
> not informed us of any rack storage in the building.  At present we are
> looking at a 12" slab as a starting point.  Having only done one flat
> slab project (actually checking an existing building to insure it was
> designed for vertical expansion) I am trying to find out about any
> pitfalls I may need to look out for.  Based on limited investigation
> there may be a need for drop panels (don't think so for sure but is a
> possibility).  Also would love to get some ideas for references on the
> design of flat slabs.
>
> Mike
>
>
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