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Re: Structural steel protection below grade

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Thanks Harold.
You also have been a great asset to this list.

Regards,
Ray Shreenan
----- Original Message ----- 
From: "Harold Sprague" <spraguehope(--nospam--at)hotmail.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Monday, June 28, 2004 9:11 AM
Subject: RE: Structural steel protection below grade


> Ray,
>
> In the telecommunication tower industry guy cables are connected to
concrete
> anchors via steel bars that are embedded in soil.  The standard is to use
> hot dipped galvanized steel anchors, and any steel in contact with the
earth
> is coated with a bitumastic coating.
>
> The water treatment industry is very fond of coal tar epoxy coatings.
>
> In your particular example, I would tend to use the bitumastic coating,
and
> then place a concrete barrrier around the column.  Provide positive
slopes.
> I would also use a polyurethane calk around the perimeter at the interface
> between the concrete and the steel.  Concrete will shrink.
>
> Regards,
> Harold Sprague
>
>
> >From: "Raymond Shreenan" <rshreenan(--nospam--at)adelphia.net>
> >Reply-To: <seaint(--nospam--at)seaint.org>
> >To: <seaint(--nospam--at)seaint.org>
> >Subject: Structural  steel protection below grade
> >Date: Fri, 25 Jun 2004 21:38:57 -0700
> >
> >Hi sport fans:
> >
> >I have a project under construction with structural steel tubes embedded
in
> >deep concrete piers for roof support and lateral restraint for open
carport
> >structures with shed roofs.  The plans called for the concrete piers to
be
> >poured up to the slab grade.  The piers are 3" 6" square with the columns
> >centered in the piers.  Unfortunately the piers for some of the end
columns
> >that were adjacent to dirt planters were only poured up to the bottom
> >elevation of the 4" concrete slab leaving the outboard face of the steel
> >tube that is in line with the slab edge exposed to the dirt for 4".  I
> >suppose was done for appearance.  The other 3 sides of the column are
> >encased with concrete up to finished slab grade.
> >
> >Is there a water proofing product that will endure a hostile environment
> >(irrigation water and fertilizer) and protect the steel from corrosion as
> >wll as a thick concrete cover below grade?
> >Or, should I spec a second 4" concrete pour bonded to clean concrete
> >surfaces of the adjacent slab edge and top of concrete pier?  The steel
> >below grade is currently coated with a shop coat of primer only.
> >
> >Thanks in advance for any information that you steel and water proofing
> >experts may provide.
> >
> >Ray shreenan SE
>
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