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Re: [CONCRETE] When Is Concrete "Cracked"? [it depends]

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"Too cracked" for what? 

I just looked at a foundation that had a crack that was close to 1/2" wide and I told them it was no concern -- because it was in a house that's almost a century old and there are no other signs of problems.  If I saw the same crack in a slab or beam I would be *very* concerned. 

Context is all.


In a message dated 5/16/08 12:40:50 PM, RLHess(--nospam--at) writes:
I have always heard that 0.6mm or 0.025 in., or whether you can stick a credit card in it is a useful measure.  Of course that is too simple for a committeeman at ACI to consider.
Richard Hess

-----Original Message-----
From: bill(--nospam--at) [mailto:bill(--nospam--at)]
Sent: Friday, May 16, 2008 11:42 AM
To: seaint(--nospam--at)
Subject: [CONCRETE] When Is Concrete "Cracked"?

I know that reinforced concrete "always cracks," but what is the criterion for determining when it is "too cracked;" that is, that the cracks are significant enough to need attention?
Seriously, I've had a tough time finding a defnition of this in ACI documents, etc.

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