[Top] [All Lists]

[TowerTalk] Crane lifting a Rohn 25G

To: <>
Subject: [TowerTalk] Crane lifting a Rohn 25G
From: (
Date: Mon, 8 Jun 1998 19:07:25 EDT
In a message dated 98-06-08 18:06:27 EDT, writes:

<< Here is one for you engineer-types out there:
 I have been given a 70' Rohn 25g tower, standing on a city lot.
 Being in the construction biz, I have several friends in the crane
 business. I thought I would cash in a favor and have one of them stop by
 the site some day while in the area and make quick work of dismantling
 the tower.
 I figured I would have him latch on somewhere up near the top, remove
 the lowermost set of bolts joining the sections, disconnect the guys at
 the anchor points, and have him pick the whole tower an inch or two to
 get the lowest sections disconnected. Then, set it back down on the
 ground and slowly let out cable while swinging the boom sideways so as
 to keep the tip of the boom straight above the attachment point on the
 tower. Also, will keep someone hanging on to the base to keep it from
 kicking out.
 Is the tower rigid enough to keep from buckling in the center once I get
 it down around 45 degrees and under? Also, can anyone suggest the best
 way to attach a sling, etc. for hooking up the crane line? >>

        Sounds reasonable. The sections only weigh 280 pounds so I don't think
you can get in too much trouble. The biggest potential problem would be
possible buckling of the tower in the middle. I would probably pick it at
about the 2/3 up point in order to reduce the span of tower.

       I might just sling one leg with a basket hitch. That way, the other two
legs are in compression which is the probable failure mode. 

      Anyone else?

Cheers,  Steve   K7LXC


FAQ on WWW:     
Administrative requests:

<Prev in Thread] Current Thread [Next in Thread>