[TowerTalk] rebar does rust

[FireBrick]

The old 'bluing' coating on rebar had a very short lifetime.
The new coating, green in color, is a much better coating.

But that will degrade also.

Just drive by a road construction stockpiling area some day.
You will see piles of rebar that was rejected for rust infiltration.

I can't remember the rejection limits anymore.

But what happened is the rough treatment from shipping and storing/moving chips some of 
the coating off, and then rust starts BIG TIME.

As for a tower section rusting at the bottom of a concrete base.
That thin metal has room to expand. Into the  tube void, hence no pressure on the 
concrete.

Tower bolts sticking up to hold a base. Should always be rust proofed before attaching the 
base.
They should also be inspected twice a year, and cleaned/recoated as necessary.


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Bill H. in Chicagoland
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