[TowerTalk] Tower design question

[jeremy-ca]

I have a 5 section Heights I pulled out of the town dump about 20 years ago 
thinking I might make a 80M vertical out of it.. Every section was split 
from ice. So much for a stupid design!
Now that aluminum scrap is up I'll take it to the scrap yard.

Carl
KM1H




----- Original Message ----- 
From: "Gary Schafer" <garyschafer at comcast.net>
To: "'Roger (K8RI)'" <K8RI-on-TowerTalk at tm.net>; "'K4SAV'" 
<RadioIR at charter.net>; <towertalk at contesting.com>
Sent: Monday, July 02, 2007 12:04 AM
Subject: Re: [TowerTalk] Tower design question


>I know of two manufacturers that do it "upside down". Heights is one and
> there is another (can't recall the name)  that looks almost like it that 
> is
> also upside down. They are aluminum towers and each section is tapered (so
> you can't install them the wrong way) and the upper section joins the 
> lower
> section by fitting inside of the lower part. It makes a nice funnel for
> rain. I have one.
>
> 73
> Gary  K4FMX
>
>> -----Original Message-----
>> From: towertalk-bounces at contesting.com [mailto:towertalk-
>> bounces at contesting.com] On Behalf Of Roger (K8RI)
>> Sent: Friday, June 29, 2007 6:52 PM
>> To: K4SAV; towertalk at contesting.com
>> Subject: Re: [TowerTalk] Tower design question
>>
>>
>>
>>
>> >I thought this was an interesting question, but no one tackled it except
>> > for one guy who said that's the way it's done.  So is that really the
>> > reason?
>>
>> I saw one answer that said that is *not* the way it is done.
>> I have never seen a tower designed the way you describe. They are all the
>> other way around. The larger tube or bell on on the upper section and 
>> sets
>> down *over* the lower.  Small end should always point up with the next
>> section setting down *over* it.
>>
>> That will still not keep water out of the legs except for rain.
>> Atmospheric
>> pressure changes be they barometric changes or due to temperature changes
>> will cause water to condense inside the tower legs which is the reason 
>> for
>> the bottom section setting in pea gravel or sand below the frost level so
>> it
>> can drain.
>>
>> Roger (K8RI)
>>
>> >
>> > Floyd Rodgers wrote:
>> >
>> >>Something has been bothering me for a while. With all the discussion 
>> >>and
>> >>problems with tower leg corrosion, filling with water and splitting,
>> etc.
>> >>Why do almost ALL the manufacturers design the joints to telescope
>> inside
>> >>from above which leaves water able to run inside joints and fill tubes?
>> >>Why not simply invert the connection by telescoping over the bottom
>> >>section so water just runs outside not through the joint. I know there
>> is
>> >>no difference in joint strength or assembly difficulty, so why?
>> >>_______________________________________________
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