[TowerTalk] STEPPir ANTENNAs

[Jim Lux]

There are plenty of examples of concrete bases that are formed and backfilled.  Think of it this way - if you built a huge concrete base that was sitting on the surface, that was sufficiently large to handle the overturning moment of the tower, then you're not depending on the surrounding soil to hold it in place.   There's some pictures out there of wind turbine mast bases that are enormous, and they're sure not depending on the surrounding soil.  They *do* depend on the soil underneath the base not collapsing under the load.

Some years back on TT, there was a discussion about unusual tower bases that looked like an X - with longish beams extending out from a central base. With enough reinforcing to take the bending moment, you can do this and have a fairly shallow base.   If you had a cheap source of big steel I-beams you could use *those* as the arms, and just cover the beam with enough concrete to protect it.


On Sat, 5 Apr 2025 21:26:46 -0700, "Steve Jones" <n6sj at earthlink.net> wrote:

I wonder how it made it through the recent tornadoes...
Can't imagine excavating a big hole, forming up the concrete, and
back-filling it! My foundation was poured into undisturbed soil.
Like the wood-burning stove in the shop!
73,
Steve
N6SJ




-----Original Message-----
From: TowerTalk  On Behalf Of David
Gilbert
Sent: Saturday, April 5, 2025 9:16 PM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] STEPPir ANTENNAs


Somebody with more cents than sense.


On 4/5/2025 7:23 PM, john at kk9a.com wrote:
> Imagine this maintenance headache:
> https://www.kkn.net/dayton2006/K9LTN.pdf
>
> John KK9A
>
>
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