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Re: drop panel reinfocement

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             I agree on Harold  Sprague  considerations .
             and biside that  drop panel reinforcement  risist to transfer the shear and moments
               to the column below .
----- Original Message -----
Sent: Wednesday, September 17, 2008 8:41 AM
Subject: RE: drop panel reinfocement

There are 2 considerations:
1.  Alternate bay loading may put some reverse moment and tension in the bottom of the drop panel.
2.  Minimum crack control steel is a good idea for issues like thermal, creep & shrinkage, seismic, etc. 
If there is no steel to control the cracks, the cracks get big and ugly.  If you have some minimum steel, the cracks are still there, but they remain fairly tight and "controlled".

Harold Sprague

From: marymskp(--nospam--at)
To: seaint(--nospam--at)
Subject: drop panel reinfocement
Date: Wed, 17 Sep 2008 12:17:47 +0400

Dear all,
Is it necessary to provide bottom minmum  reinforcement  for a drop panel in flat slab with drop panels?  Since it is compression zone I think reinforcement is not required.please tell yours opinion.
Mariyamma suresh
Structural Engineer

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