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Re: Crack Control: ACI 10.6.4[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaint(--nospam--at)seaint.org
- Subject: Re: Crack Control: ACI 10.6.4
- From: "refugio rochin" <fugeeo(--nospam--at)gmail.com>
- Date: Fri, 21 Jul 2006 16:10:02 -0400
if you are designing to aggressive environments, 10.6.5 recommends more to be done. at this point, i might advise going to ACI environmental structures committee, where there are more criteria for these structures. when i designed environmental structures previously, we used the z factor, which largely controlled our final steel design. While the stresses in the steel where usually around 24 ksi, we sometimes had to increase the steel to meet the z factor bringing the stresses down significantly, and sometimes increase the size of the wall. There was a limit on the cc used for calculating z, at 2", and sometimes we had cc of 3 which would make the z factor increase. Limiting it back to 2" (in the calculation), made it a little more reasonable.
But see, here, if we were at 36 ksi, as says in the commentary of ACI 318-02, the spacing would be limited to 10".
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