Hmm. All I can say is we install much larger pieces of assembled tower
than R55 (and 50' pieces of monopole weighing many thousands of pounds
for that matter), and crane operators seem to have no problem picking
the tower from the top end and standing it up straight without dragging
it. It seems to be second nature with these guys.
I can't quite visualize how rings complicate things that much if you
have the base on the ground and the tower tipped up on a support 2/3 or
so up the tower.
-Steve K8LX
On 10/17/2016 22:39 PM, Grant Saviers wrote:
Since my largest tower went up with a commercial tower company who
builds 400' plus towers, and who required the base be managed, I would
say there are definite disagreements about this. When lifting sections
with rings off supports, it can't be done safely and reliably, no matter
the skill of the crane op. A plain stick of Rohn 25/45/55 is a
different animal. Note the thread origin is about tower sections with
rings already mounted.
Grant KZ1W
On 10/17/2016 18:55 PM, Steve Maki wrote:
On 10/17/2016 11:53 AM, john@kk9a.com wrote:
The weight is irrelevant. A skilled crane operator can move the boom as
it is being lifted leaving the section on the ground as a pivot point.
Of course if someone wishes to build a slide or use a loader to move
the base as it is being lifted that is perfectly fine, but I won't be
doing this.
John KK9A
I agree. A good operator has no problem at all with this scenario, as
long as the crane is sized properly and can be positioned properly.
It's just a non-issue.
-Steve K8LX
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