[TowerTalk] Adjustments to Tower Base Pier J-Bolts

[Steve Maki]

When we stack a big self support lattice tower, we usually stick build 
the bottom section (with a small boom truck) right onto the anchor 
bolts. On big towers each leg has climbing pegs on the lower sections, 
which makes this feasible.

Then the rest of the tower gets assembled horizontally in 60' to 100' 
sections using the boom truck and ladders. I'm talking 25' face sections 
here.

Then the big crane comes in for a day to stack the whole thing.

Paul might consider this method, as the slop in member holes should 
allow assembly even with the slight misalignment of the anchor bolts.

A couple of nice long bull pins will be handy of course.

-Steve K8LX

On 7/24/2017 10:20 AM, Jim Thomson wrote:

> ##  Thats a monster tower project he has taken on....and  two of em.   It would almost require a small crane to
> assemble the tower in the horizontal position..then a monster crane to lift it upright to the vertical position, then
> lift, swing..and lower onto the myriad of 1.875 inch base bolts.   This is where you want multiple deep sockets,
> open + box end wrenches, tq wrenches, loads of help, etc.   Both my 1.625 and also  1.8125 sockets, both deep types,
> are the .750 drive variety. I used a .500  to .750  drop in adaptor, so I could use my .500  tq wrench and also my
> .500  corded electric and also .500  air impact wrenches.  You can also buy cordless tq wrenches with up to 600-700
> ft lbs of tq.   Great when the commercial AC power goes out.... or you are up the tower...and  dont want to drag an
> extension cord ....or air hose with you.