K7LXC@aol.com wrote:
>
> In a message dated 4/8/2010 9:41:03 P.M. Pacific Daylight Time,
> towertalk-request@contesting.com writes:
>
>
>> The tower has been standing almost 3 years. The previous owners climbed
>>
> it. I'm meeting with the land owner Monday to remove the tower and
> relocate it to a different part of the property, and do it right. I've
> built other 25g towers, and when I found this one we were a bit shocked
> to say the least. Nobody on my crew is climbing it.
>
>
> The way to remove it is with a good sized crane with double hooks.
> That way one of the hooks can take you up in a man-basket to a good point up
> the tower to attach the other hook with slings to the tower. The operator
> lets you down in the man-basket, you cut the guys and the crane lowers it
> down. You only have to attach the second hook somewhere about the 2/3 height
> so a crane with 120' of jib or so will work. I've lowered 100' of 25G in one
> piece and it came down in one undamaged piece. 150' is pushing it so you
> might wind up bending some sections but at least it'll come down safely.
>
> You'd never catch me up on that thing! I hate 25G anyway.
>
Amen! And...It's likely been overstressed if it's been through much
wind. At those steep angles the guy pressure on the base of a 150 foot
tower is nearly to total of the guy tension. With substantial wind it
could easily double or even triple the vertical load. I wonder if the
guys are over size as well. I'll have to calculate out just a 70 MPH
gust would do to the vertical load.
73
Roger (K8RI)
>
> Cheers,
> Steve K7LXC
> TOWER TECH
>
>
>
>
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