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Re: Manhole cap

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Roark's 6th Edition page 400 - circular hole with hole, also Timoshenko's "Theory of Shells and Plates" p. 66.
On the practical side of the problem standard plans for "Flat top manhole covers", are readily available from the local agencies. 
Steve Gordin SE
Irvine CA
----- Original Message -----
Sent: Friday, July 21, 2006 6:00 AM
Subject: Re: Manhole cap

is there anyone out there with a Roarks (spelling?) that might cover a square plate with a hole in the center?