Just a bit more on removing the piers, to try simplify what I meant earlier. Re how tight it all is and how it is held during removal. In the images below.
1. The angled pier is helped in tension in two directions, the weight of the roof, the cables to the ground
2. The tension of the back cables to the ground transferred via the clamp, to the outer upper corners of the steel tower.
3. Back cables can be removed. Tension in two directions still kept, pier no longer needed as the steel tower is now doing that work. But the pier itself is still attached to the old and new cables
4. The top anchor piece needs removed, so the pier can start to manoeuvre out. But as soon as that's cut away, what is it that keeps the pier up at that angle!
5. Or if taken apart in bits, they all need braced individually, and access lower down is harder to reach.
You can see just how close to the new the top piece is underneath the platform, green arrow pointing at it. This is the other tower that hasn't yet had the clamp on (although you can clearly see a galv strip where it is going), as it is easier to see than on the other one. Even if they cut away all within the new steel brace, how they get that out of there is going to be interesting to see. They may well have to remove that platform they just put up, to get the top piece out.
How they then brace the pier after that, is the other issue. There seems to be scope to prop it in the locations in green, possibly. And the only way out after that seems diagonally out and up.
Really intriguing one to watch.
