Bank of New York
1) Bank of New York - bumpout
Challenge
Control the exactness of the curvature, ensure that the finish product looks smooth, does not look like a "zigzag".
To do so, each vertical joint between each piece of glass must be layed out with a tolerance of +/- 1/16”. The concrete and the structural posts are installed with a tolerance of +/- 1”, so we cannot use them as a reference.
The glass overhangs outside of the new curved slab, so it is not possible to snap lines on the floor as done traditionally.
Solution
Cut on the waterjet some templates extracted from the Autocad planview, and fasten them temporarily on the slab, with a great precision :
on the inboard of the template, on the slab side, are 2 points of reference to the X and Y axis of the building. Those axis are located more inside the building, they got snapped on the floor by the GC’s surveyor.
on the outboard of the template, overhanging and turning around the post, is the exact location of the vertical joint between 2 pieces of glass.
A portable vertical dot laser can then transfer above each template its vertical glass joint.
Beautification of 2 floors dedicated to the trading activity of this bank located downtown in Manhattan.
2) Bank of New York - suspended stair
Challenge
Each stainless steel rod is adjustable in tension, through the use of a custom torque-wrench.
But this adjustment influences directly the up and down position of each rod.
The vertical rods must face exactly the steel "saw-tooth" fastened inside the wall
1/8" off would be enough to create a visible twist in the rod
Solution
First set all the rods at their proper tension.
Then, field weld each tread connector at proper height.
After glass treads are installed, check one last time the tension in the rods, some minor adjustment may be required.