[TowerTalk] a really big falling derrick tiltup (104 meter)

[knormoyle@comcast.net]

after my last post about falling derricks
what kind of big tiltups others (wind turbines, wind speed) do,

I looked some more.


these guys talk about a 341 ft tiltup. Really!

Some good data in there. (interesting where
they have redundancy, guys, and manpower..and calculated forces)

apparently they make a tower out of composite material...so it's light
but stronger than steel? ...so it's not really fair :)

http://www.isotruss.com/pdf/guyed%20towers%20installation%20manual%20030916.pdf


They don't mention windload, but page 15 has this as the biggest
example:
500 lbs on top of tower.
104 meter tower (supposedly the tower only weighs 575 lbs)
60 ft gin pole (multiple attach points from gin pole to tower is key)
7748 lb winch pull (and that's with a compound pulley?)


general pics at http://www.isotruss.com/gallery.asp

a photo spread of a BIG tiltup..you gotta click on the pics..insane!

http://www.isotruss.com/photo-gallery.asp

Now THAT would be a field day antenna!

-kevin