On 10/12/06 08:08 pm Rick Karlquist wrote:
> One thing that has always baffled me is:
>
> If it is so important that rebar does not come within
> 3 inches of the concrete to earth interface, then why
> is it OK for the anchor bolts to stick up out of the
> concrete?
>
> Possible answers:
>
> 1. They penetrate a concrete to air interface.
> In that case you can simply let a few of the rebar
> cage vertical bars stick up out of the concrete
> so you can grab on to them to keep the cage centered.
>
> 2. They are galvanized. However, UST ships non
> galvanized anchor bolts, so I guess it isn't 2.
But the top of the foundation is supposed to be finished off so that
water runs away instead of accumulating around the bolts. That's very
different from having rebar protruding into wet soil.
> 3. Rebar rusts easier than bolts. Probably not.
>
> Anyone have the correct answer?
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