The Bow Hi-Rise
The Bow is a truly iconic building and is inarguably one of the most complex high rises in North America, if not globally, from a structural framing point of view.View Project »
Located on Park Avenue between 56th and 57th Streets, 432 Park Avenue will be the tallest residential tower in the western hemisphere.
We installed two 600-ton mass dampers to reduce vibration for a Manhattan luxury residential tower. The dampers partly rest on the 86th floor, and partly hang from the 89th floor. In addition to installing the dampers, we created the steel framework that supports them.
The two dampers weighed 600 tons each, but the crane limit was 20,000 pounds. In simplest terms, each damper is a large steel box filled with mass plate. We built the box to suit the crane, and broke each damper up into 200 pieces, which were raised individually and assembled on the 86th floor.
It took more than 8,000 bolts to assemble the boxes. The schedule required about 8 weeks of crane time followed by 4 weeks of adjustments.
Metropolitan Walters was responsible for the install of the dampers and the supporting structure which was fabricated by Walters.