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RE: 50' oc control joints for SOG ok?

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Yes, you are correct.  Another guideline I have heard that is used for continuous pavement (no joints) used by a number of state DOT’s is 0.6%.

 

Roger C. Davis

Architect

 

 

205 N. Dewey St.

Eau Claire, WI 54703

P (715) 832-1605

F (715) 832-7850

 

-----Original Message-----
From: Martin Li [mailto:mli(--nospam--at)tb-engr.com]
Sent: Tuesday, August 16, 2005 4:45 PM
To: seaint(--nospam--at)seaint.org
Subject: RE: 50' oc control joints for SOG ok?

 

It is NOT 4.75%!  It is about 0.475%.

 

Martin

-----Original Message-----
From: Roger Davis [mailto:rdavis(--nospam--at)sdsarch.com]
Sent: Tuesday, August 16, 2005 4:18 PM
To: seaint(--nospam--at)seaint.org
Subject: RE: 50' oc control joints for SOG ok?

CRSI has a table for minimizing cracks in a retaining wall and I think ACI 350 has a similar guide.  For a 50’ spacing, CRSI indicates about 4.75% Agross.  A retaining wall is likely to go through greater temperature swings than your slab but I think you are light if you want to minimize cracking.

 

Roger C. Davis

Architect

 

 

205 N. Dewey St.

Eau Claire, WI 54703

P (715) 832-1605

F (715) 832-7850

 

-----Original Message-----
From: Haan, Scott M POA [mailto:Scott.M.Haan(--nospam--at)poa02.usace.army.mil]
Sent: Tuesday, August 16, 2005 4:04 PM
To: seaint(--nospam--at)seaint.org
Subject: 50' oc control joints for SOG ok?

 

 

For a 6” slab on grade is it acceptable to have a 50’ oc control joint spacing for no. 4 @ 18” oc ea way.  I am looking at a tensile stress based on subgrade friction formula that calculates out.

 

Thanks.