Interesting construction details from interview with Robert Gladstone, developer of 45 Broad:
What’s the status of the 45 Broad Street project?
It’s still in the foundation stage. We had several methods presented to us to do the foundation. The building sits on rock, but the rock is 45 feet down. We had ways that would have shaved six to nine months off the foundation process and $5, $6, $7 or $8 million off of it.
We chose two years ago to go in the direction of this substantial foundation. We have 470 vertical elements [concrete rods drilled into the ground that create a wall] on the bottom floor—which is 9,000 square feet. It’s something called secant piles. We’re grabbing rock at all these locations.
All the drilling and piling is now completed and now we’re starting on the actual pouring of the foundation. That will go on for four months and it will have taken us two years to do this and a lot more money then we wanted to spend. But the elevators will work perfectly because they will be sitting on solid ground.
https://commercialobserver.com/2019/...t-development/