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Re: Elevated Structural Floor Slab Jointing

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Dear Bobby,
Just curious as to why a 66'x71' slab has been designed as a one way slab?
To answer your questions
Construction joint should be avoided if possible.
If not possible to avoid, then the joint should be at mid span, where shear is zero.
Pankaj Gupta
Structures Online
----- Original Message -----
To: seaint
Sent: Thursday, July 10, 2003 6:41 PM
Subject: Elevated Structural Floor Slab Jointing

Greetings and Salutations:

I run into this situation about once every blue moon…..and the clock is ticking…..

I have an elevated structural one-way floor slab supported by concrete beams. The slab has been designed as a continuous members and currently has bottom steel at mid-span and top steel over the supports. The slab dimensions are about 66’ x 71’.

Two Questions….

Do I place construction joints in the slab systems?

If so, where do I put the joints?

Thanks in advance!

Bobby Jenkins, PE
Jenkins Engineering, Inc.
PO Box 2101
218 S Thomas St  Suite 209
Tupelo, MS  38803
(662) 840.1233 vocal
(662) 840.1103 fax
E-Mail:  jei(--nospam--at)