----- Original Message -----
From: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
To: "jeremy-ca" <email@example.com>; "Blake M" <firstname.lastname@example.org>;
<email@example.com>; "Bill Winkis" <firstname.lastname@example.org>
Sent: Wednesday, June 27, 2007 7:09 PM
Subject: Re: [TowerTalk] Tower ACCIDENT
>> First of all, ANY tower that is installed by burying a section should be
>> suspect UNLESS you are absolutely sure that the legs have plenty of
> True as many even set in concrete may not have proper drainage.
>> Drilling a small hole in the legs a few inches above ground can give you
> But ...ROHN doesn't even want the bolt holes, which will be too small,
> reamed or drilled out as it'll break the galvanizing which leaves bare
> exposed. They expect the installer to use a "taper pin punch" to open the
> holes just enough for the bolt to slide in as a tight fit, but none of
> having to screw the bolt in.
Following that logic you then cant reuse tower sections if the galvy has
been nicked. Obviously that is not real world reality.
And as I have mentioned earlier there are now several speciality coatings
that can be used to prevent rust from forming and even smother existing
>> idea if there is standing water. If the water is clear then it is
>> safe; if rusty then walk away.
>> If its a dry hole at that level then snake some cotton string down the
>> If it comes back wet and rusty then Id also suggest not climbing.
> It shouldn't normally come back wet. If it does the system doesn't have
> adequate drainage.
Duh, wasnt that my point?
>> New tower construction should always use a base plate and pier pin if the
>> only support is guy wires. If house bracketed then a minimum of 2
> Not according to the ROHN catalog. You can use either the base plate or
> they build, or did, bases for both the 25 and 45G that are designed to be
> set in concrete which is what I used. The bottom ends of the tower legs
> supposed to set in between 6 and 8 inches of pea gravel. The concrete is
> poured over this while the tower base is inside the rebar cage. Yes they
> show two brackets and I believe the maximum above the top bracket is only
> feet, but I'd have to look that up.
Rohn offers 3 mounts using flat steel plates. What I have done is use the
idea of the self supporting mount, 25GSSB, which uses mounting holes in the
4 corners. By drilling 3 holes and going from 5/8" to 3/4" bolts it
increases the strength a bit. Probably not necessary, especially on short
towers or light wind loads. The pier pin is not used on a bracketed tower.
The height above the top bracket that you are alluding to is for a TVRO
dish. Using the HBUTVRO bracket (not the lighter duty HB25AG or HBU)
SECURELY fastened to the structure I see no reason that 20-25' cant be used
with a typical 14-30 mHz multiband yagi.
I will be going 30' above the top bracket for a 45G install to be used for
UHF and above. My other 4 towers are 100-250' from the house which is
unacceptable for the ultra highs.
> Roger (K8RI)
>> is required. The base should be a standard base plate but with one hole
>> each corner and secured to the concrete with 3/4" J bolts.
>> An existing tower that was installed without drainage MAY have its life
>> extended by drilling those small holes I mentioned. Then with ~ 3/16"
>> inserted down to the bottom regularly pump out any water. There are ways
>> derust the legs and seal against further rust but its an iffy proposition
>> when you cant tell the extent of the damage.
>> ----- Original Message -----
>> From: "Bill Winkis" <email@example.com>
>> To: "Blake M" <firstname.lastname@example.org>; <email@example.com>
>> Sent: Wednesday, June 27, 2007 7:39 AM
>> Subject: Re: [TowerTalk] Tower ACCIDENT
>>> This information is all well and good ... it rings with a bell of
>>> caution ... BUT , how do you know .. ????
>>> In this case the climber felt all was well until the tower came down
>>> with him on it .. but now how in the world do you test and determine
>>> all is OK before you climb.?? Or what steps do you use to protect
>>> your self ...
>>> Certainly the professional tower people who partake in this forum
>>> will have a degree of in site for us .. but it needs to be
>>> discussed.!!! We've got guys here with 5-10-20 plus years old towers
>>> ....What is the answer??
>>> At 10:05 PM 6/26/2007, Blake M wrote:
>>>>If I had a nickel for every time somebody has told me this line....!!
>>>>In my experience, what this really means is:
>>>>"This is a hack-job install, but I really need to make you believe it's
>>>>or else you're going to bolt on me and I'm going to have to fork out
>>>>coin for a crane."
>>>>Simple psych 101.... If you have a pretty girlfriend, you wouldn't have
>>>>walk around telling people how pretty she is, now, would you? ;-)
>>>>[mailto:firstname.lastname@example.org] On Behalf Of Richard J. Fiero
>>>> The owner told me that he and his Brother Both men about 230 pounds
>>>>had been on the tower recently
>>>>at the same time and that it was strong as an ox.
>>>>TowerTalk mailing list
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