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RE: Mat Foundation

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Cold joints between pours should be dowelled together.  Construction Joints are likely spaced 20 to 30 times the slab thickness.  However, only having like 3 joints one way and two the other isn't all that great.  In a 16 inch slab, I have joints between 20 and 32 feet O.C.    That being said, with your slab, maybe put the joints at 25' O.C. along the 75' length and 21.5' O.C. along the 86' length.  Is this what you're looking for???
 
Dave Maynard, PE
Gillette, Wyoming
 
PS: What part of Wyoming are you at???
-----Original Message-----
From: Lutz, James [mailto:James.Lutz(--nospam--at)earthtech.com]
Sent: Friday, April 01, 2005 12:00 PM
To: 'seaint(--nospam--at)seaint.org'
Subject: RE: Mat Foundation

Pour sequence should start from near the middle and work out toward the edges.
-----Original Message-----
From: Abe Knapp [mailto:AKNAPP(--nospam--at)state.wy.us]
Sent: Friday, April 01, 2005 10:51 AM
To: seaint(--nospam--at)seaint.org
Subject: Mat Foundation

Fellow Engineers,
 
I am looking for some guidance on a Mat Footing.
It is 2 feet thick and 86'x75'.  Winterkorn and Fang recommend placing the concrete in approximately 30 foot square sections and letting each pour set for two days before placing the next adjacent area.  I am looking for some guideance on how to specify the joints.
Thanks in advance.
 
Abe Knapp
Wyoming


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