[TowerTalk] Homebrew Crank-up

[scottw3tx at verizon.net]

Plan to budget about $9000 for a licensed PE and SE team to study,  
stamp, and approve the plan for TIA-G for the zip code of the project.  
Otherwise, if there is a failure/property damage/injury, the liability  
falls on the shoulders of the builder. Pun intended.

Best regards,
Scott

On Mar 27, 2010, at 10:12 AM, jimlux <jimlux at earthlink.net> wrote:

> Christopher Atkins wrote:
>> Stan,
>>
>> Homebrewing a tower especially a crank-up is a dangerous and risky  
>> proposition to say the least.  The ROI and the safety concerns is  
>> not worth the risk. In the end you will be better off buying a  
>> crank up tower. Just my opinion..
>>
>> Good Luck
>> --- On Fri, 3/26/10, Stan Stockton <k5go at cycle-24.com> wrote:
>>
>>
>> From: Stan Stockton <k5go at cycle-24.com>
>>
>>
>> Anyone have an ideas regarding rails, rollers, general set-up, etc.  
>> that could be used for about 75 feet of 55G or 65G that would  
>> telescope into about the same length of larger tower (33 inch face,  
>> 3 inch legs), probably using an extra large prop pitch to raise and  
>> lower for 48 hours a few times a year dependent on good weather :-) ?
>>
>> Thanks...Stan, K5GO
>>
>
> I don't know.. I haven't seen many 120-150 foot crankups in the HRO
> catalog recently.
>
> I have seen tower trailers with that sort of height, built on the base
> of a 40 foot semitrailer, but not as two sections, which is what  
> Stan is
> proposing.
>
> Home brew is probably about the only way you're going to get it.  And,
> there's no inherent reason why a ham couldn't engineer and build the
> structure as well as the commercial vendors.
>
> I'd start looking at how they build the tall emergency lighting tower
> trailers.  Based on the ones I've seen they use fairly standard
> mechanical parts (get your copy of McMaster Carr and Grainger out).   
> If
> you want rollers, there's a variety of things like those used to  
> support
> big sliding doors on airplane hangers and such. They run on a pipe  
> track.
>
> You're obviously going to use motorized raise/lower, so you need to  
> give
> some thought to how you'll do the rigging.
>
> Is the bottom half going to be guyed?
>
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