Not everyone's requirements are the same. Rohn actually approves both methods
as they sell base sections to bury in concrete.
Yes, the tapered section is better but a whole lot more expensive.
73
NJ0F
Sent from my iPhone
> On Jan 29, 2016, at 11:13 AM, Ken K6MR <k6mr@outlook.com> wrote:
>
> Why do people insist on putting the first section in concrete? If you read
> the K7NV analysis of guyed towers it is far better to use a pier pin base.
> Less stress on the tower and the problem of rust and/or freezing damage to
> the tower disappears. Rohn approved.
> Seems like a win-win to me.
> Ken K6MR
>
>
>> To: towertalk@contesting.com
>> From: patrick_g@windstream.net
>> Date: Fri, 29 Jan 2016 10:55:49 -0600
>> Subject: Re: [TowerTalk] Tower buried section legs -- Buried in Concrete
>> orBelow the Concrete?
>>
>> What does the brain trust think about the idea of plugging the ID of
>> tower legs slightly above the top of the concrete foundation and
>> drilling a weep (drain) hole at the top of the plug. It would require
>> poking into that hole periodically to prevent insects or whatever from
>> plugging the hole but should eliminate the need for any concern or
>> proactive adding of pea gravel below the tower legs or acid soil eating
>> on the bottom of the legs.
>>
>> Patrick NJ5G
>>
>>> On 1/29/2016 10:40 AM, Chris Wynn via TowerTalk wrote:
>>> On my first Rohn 25 tower that I put up while in college, I had water get
>>> into a leg and actually busted outwardly. It left about an inch and a half
>>> rip looking seam. This occurred about 4 feet from the top of the concrete
>>> pad. I could only imagine that there was some type of obstruction in the
>>> leg that allowed water to build at that point. When it froze, the water
>>> expanded outwardly, busting the leg.Regardless, the tower lasted throughout
>>> my college career and until I later got married and moved out. I would
>>> imagine that my father is still using that section to hold up one of his
>>> bird houses.I would add that pea gravel as a way to drain any moisture,
>>> just in case....
>>>
>>> Good luck
>>> Sent from Yahoo Mail on Android
>>>
>>> On Fri, Jan 29, 2016 at 8:51 AM, Larry<lknain@nc.rr.com> wrote: I have
>>> always put the pea gravel in the bottom as spec'd by Rohn. The way
>>> the legs are constructed and assembled on G sections I suspect there is very
>>> little water that gets in the legs. Probably more of an issue if the top
>>> section is just another straight section and the ends are not capped in some
>>> way. But I could imagine a very small amount of seepage perhaps through the
>>> bolt connections and perhaps over time rusting out the bottom of a leg that
>>> is sealed in concrete. Perhaps condensation in some environments could play
>>> a role. The latter two seem awfully remote to me.
>>>
>>> 73, Larry W6NWS
>>>
>>> -----Original Message-----
>>> From: Larry Loen
>>> Sent: Friday, January 29, 2016 7:17 AM
>>> To: TowerTalk
>>> Subject: [TowerTalk] Tower buried section legs -- Buried in Concrete orBelow
>>> the Concrete?
>>>
>>> The Rohn spec calls for the legs of the bottom section to be buried a few
>>> inches in pea gravel below the concrete. My contractor suggests that as
>>> long as the top is properly sealed, it's overkill and that overall, it's
>>> better to encase the legs in concrete, protecting them from corrosion from
>>> that rare day in Arizona that the water levels would reach the bottom of
>>> the tower. He suggests that the tower will be adequately sealed on top.
>>> Soil here is acidic enough that I've been advised not to let the tower
>>> sections touch the ground for even the short time they are stored here
>>> awaiting erection. Even if some got in over the years, rainwater is
>>> presumably less acidic.
>>>
>>> I don't try to innovate in these matters, but I wonder who is right here.
>>>
>>> Thoughts?
>>>
>>>
>>> Larry WO7R
>>> _______________________________________________
>>>
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