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Re: [TowerTalk] (Repost) Engineering advice on above ground foundation

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Subject: Re: [TowerTalk] (Repost) Engineering advice on above ground foundation
From: "Jim Chaggaris" <>
Date: Fri, 5 Jun 2009 21:23:15 -0500
List-post: <">>
Great stuff Frank.

Jim N9WW
James Chaggaris
PowerOne Corp./PowerOne Environmental Corp.
1020 Cedar Avenue
Suite 203
St. Charles, IL 60174
Phn: 630-443-6500
Fax: 630-443-6505
Cell: 630-669-2241

-----Original Message-----
[] On Behalf Of
Sent: Friday, June 05, 2009 9:06 PM
Subject: Re: [TowerTalk] (Repost) Engineering advice on above ground


In 1912, German company built an 820 foot radio tower not far from you on an
ocean front island in Tuckerton, NJ.  They also had a high water table
problem and built most of their tower and guy wire foundations above ground.

They must have done a good job, because the huge foundations are still
there!  One is right next to a house where N2GUU, N2NFH and KA2PFL live:

This one is in the middle of a street:

And this one too:


---- Original message ----
>Date: Fri, 5 Jun 2009 12:27:13 -0700 (PDT)
>From: Rudy Bakalov <>  
>Subject: [TowerTalk] (Repost) Engineering advice on above ground foundation

>Looks like first post came out very difficult to read so here it is again.
>I have a rather complex situation that certainly can benefit from the
collective wisdom and experience of this reflector.
>My property has a very high water table and as a result my builder and I
decided to build the tower foundation mostly above ground. Specifically, we
dug a hole, filled it with compacted gravel that is above the water table,
covered the gravel with very thick sheets of plastic, and inserted 2'
styrofoam boards around the base. Then we poured the concrete.  As a result,
only about 1.5' of the foundation is below ground, 3.5' are above.  The
overall dimensions are 10' x 10' x 5'.
>Now I wonder what are the additional engineering issues we need to address
to make sure the foundation will last and the 90' AN Wireless tower will
stay up.  Currently, we have identified the following next steps:
>1) Waterproof the concrete using silica based solutions, such as Penetron,
Xypex, etc. as permanent solution against water getting into the foundation
>2) Add extra waterproofing using tar/asphalt-like solutions to make sure we
have extra protection should cracks emerge
>3) Add styrofoam boards to prevent against freezing (it gets as cold as
-25F in Ontario)
>4) Backfill around the structure to create a mound that takes the rain and
melting snow water away from the concrete. I have also proposed we layer
more plastic sheets about a foot below the mound surface to make sure no
water gets near the foundation
>Any further comments and suggestions will be greatly appreciated.
>Rudy N2WQ
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