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RE: Cambered Slabs

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In Chicago, we simply indicate the value (usually in the neighborhood of 3/4”-1”)

in the center of the bay on the framing plan.


He (concrete guy) slopes the formwork up to the center of the bay in each direction…


I’ve also seen slabs “double formed” i.e., flat primary forms with an additional plywood overlay

To achieve the camber…


The decks are typically surveyed within 6 hours of placement then immediately after stripping…







David L. Fisher SE PE

Fisher + partners

372 West Ontario

Chicago 60610



312.573.1726 fax


312.622.0409 mobile

From: GSKWY(--nospam--at) [mailto:GSKWY(--nospam--at)]
Sent: Tuesday, April 27, 2004 7:35 AM
To: seaint(--nospam--at)
Subject: Cambered Slabs


I think a little while back there were some comments about cambering reinforced concrete slabs.

I have never actually seen this done.  How is this called out on the drawings?  What is in the specfications?

Also,  how does the contractor actually do this and how is it measured?

Gail Kelley