The other thing to check would be to see if the ICF manufacturer has an ICC-ES report. That is likely where their "beef" with your spacing was coming from. If they do have a report, then in theory it is backed up by testing reviewed by ICC-ES as part of the review process...and was done per their Acceptance Criteria.
Personally, if it was me, I would stick to the ACI 318 spacing if it is the type of ICF with a solid concrete "layer" (as opposed to the "waffle" type). But then I can be "bastard" on that kind of stuff...and I am not sure how much I really believe the IRC. <grin>
Oh, this kind ignores any issues with regards to seismic and wind. Sorry, had to toss in the disclaimer! ;-)
Regards,
Scott
Adrian, MI
P.S. My fingers are now tired from typing that in on my Treo.
..... Original Message .......
On Thu, 3 Sep 2009 09:36:21 -0600 "Jeff Hedman" <jeff_h@lrpope.com> wrote:
>Andrew and Bill,
>
>I agree with what you are saying. I don't like to exceed the 18" spacing either. However, the only reason I bring all this up is for the fact that this is such a small addition (864 sq. ft.) so the loads are really pretty low. My numbers show the walls could work with #4 bars @ 24" o.c. each way other than it doesn't meet the maximum spacing requirements. Looking at IRC Table R611.3(2) it says for an 8'-0" tall 5.5" core ICF wall with 30 psf wind pressure I can use #4 bars @ 48" o.c. each way. Now don't get me wrong I would NEVER be willing to stamp anything with bars spaced that far apart. But if calculation shows that bars @ 24" o.c. each way work and the IRC table says I can go to 48" o.c., are we really getting the client anything better with 18" o.c. spacing? If this was a commercial building or even a large house, it would be 18" o.c. spacing period. But with such a small residential addition, it sometimes makes you wonder, especially when calculations show that it will work spaced out more than 18". As far as the beer goes, I definitely agree, never light beer, and always bottles. I usually have the beers with the "watered-down lagerish taste", but being in Utah, I always have some good Utah microbrews on hand. (Yes, they sell beer here). Polygamy Porter or Cutthroat Pale Ale are a couple of good ones.
>
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>Thanks for all the input.
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>Jeff Hedman, SE
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