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Re: Computer Program-Restrained Slabs

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If you have monetary constraints with software purchases you can model the
tank with a grillage of beams. The beams are strips of slab on a 1m grid or
3 feet (or whatever). You can fix them at the base if continuous with a
base slab or have them pinned. This way it is easy to put point loads at
the intersections of the grillage.This method is a little conservative
however because of the loss of the torsional restraint of the slab members
to each other. It gives a pretty good result however if crack control
reinforcement is being used anyway and might govern spacing etc. Just a

> From: Brad Friederichs <brad(--nospam--at)>
> To: SEAOC <seaint(--nospam--at)>
> Subject: Computer Program-Restrained Slabs
> Date: Saturday, December 19, 1998 3:42 PM
> Could you recommend software for design of underground rectangular tanks
> waste water treatment plants?
> I need a program for the design of wall elements that are restrained on
> three edges and free to move on the top.
> Loading is triangular lateral (fluid) pressure.
> I appreciate the time you spend in responding to this request.
> Brad Friederichs
> VE Solutions, Inc.
> Rancho Cordova, CA