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RE: Concrete Connections

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Title: Concrete Connections
I assume you are talking about support fixity for the slab?
I would suggest designing the slab with pinned supports and don't count on any fixity or continuity from the walls. For even if you designed for some fixity at the supports, the walls and the connection to the slab will probably crack and cause it to behave more as pinned than fixed.
-----Original Message-----
From: Bill Marczewski [mailto:bmarczewski(--nospam--at)]
Sent: Thursday, February 13, 2003 8:49 AM
To: SEOC Engineering Forum (E-mail)
Subject: Concrete Connections

I'm designing a concrete swimming pool that must be treated as an elevated slab supported on piles, with the walls behaving as deep flexural members.  Can anyone point me to a reference that discusses connection fixity or pinned conditions?  I have to put rebar at the top and bottom of the walls to tie slabs together.  How do I know whether this is fixed or pinned?  Can't this end condition be controlled by the designer and how?  Thanks in advance for any responses.

Bill S. Marczewski
Peratrovich, Nottingham & Drage, Inc.
503-325-1250 Main; 503-325-9789 Fax; bmarczewski(--nospam--at)