432 Park Avenue
Rafael Viñoly’s residential tower on Park Avenue is a concrete square 93 feet on a side and 1,396 feet tall, a slenderness of about one to fifteen. Engineered by WSP Cantor Seinuk and built by Lendlease, it is as much an exercise in managing wind as in carrying weight.
A pencil on Park Avenue
A grid from a wastebasket
Viñoly traced the tower’s gridded face to a 1905 wastebasket by the Viennese designer Josef Hoffmann, which the developer Harry Macklowe called an “important touchstone.” The reception was mixed. Critics dubbed it the “Awful Waffle,” and in 2016 Viñoly himself conceded “screw-ups,” chiefly in the interiors and layouts.
Living there
Apartments begin on the 28th floor, and the largest take up an entire floor of about 8,255 square feet. Below them, floors 12 to 16 hold a residents’ club with a 75-foot pool, a fitness center and a private restaurant with a terrace. On completion it was the tallest residential tower in the Western Hemisphere, a title since taken by the 1,550-foot Central Park Tower.
Shadows on the park
432 Park arrived with a wave of very thin towers around 57th Street, and not everyone welcomed them. In 2013 the Municipal Art Society named it among the buildings whose shadows reach Central Park, and in 2015 protesters marched along 57th Street to “Stand Against the Shadows.”
Defects and lawsuits
Life inside has not been smooth. In 2021 the condominium board sued the developers for $250 million, citing more than 1,500 alleged defects: leaks, failing elevators, and creaking and banging in high wind. Residents said the trash chute “sounds like a bomb.” Engineers note that some noise is common in supertall towers, and the developers called the complaints exaggerated. A second suit, filed in 2025, alleges thousands of cracks in the facade, which the developer denies.
The building at human scale
Nearly 150 feet taller than the Empire State Building’s roof.
Wikipedia · Empire State BuildingAbout the length of a basketball court. The tower is 15 times taller than it is wide.
STRUCTUREWeight and wind
Before following the build, it helps to know what a tower is up against. Gravity pulls it down; wind pushes it sideways. At 432 Park’s proportions wind is the greater problem, which is why its core is helped by open floors and dampers. The diagram isolates each device.
From hotel to tower
The tower stands on the site of the Drake Hotel, demolished in 2007. The lot then sat idle until 2011, when it was excavated and anchored to the bedrock. From late 2012 the concrete climbed steadily, the core always three stories ahead of the frame, until the tower topped out in October 2014.
A tube within a tube
Structurally the tower is two concentric tubes: a 30-foot concrete core and an exposed concrete frame around the edge, tied together at five open, double-height floors. Those floors do a second job: they let the wind pass through, an idea that came out of wind-tunnel testing. Two dampers of about 600 tons near the top reduce the sway that remains.
The climbing cycle
Building it meant repeating one cycle, level after level. The self-climbing core form jacked itself up a story, the perimeter columns and spandrels were cast together, and then the slab was poured. The concrete was 14,000 psi in the lower 38 stories and 10,000 psi above.
One pier
Up close, the white grid is not cladding but structure, cast in place piece by piece. The figure follows one pier and the beam above it through a single level, from steel reinforcement to finished concrete poured against stainless-faced forms.
A small glossary
- Load path
- The route a building's weight (and the wind's push) takes from where it starts, down through floors, beams and columns, into the ground.
- Column
- A vertical member that carries weight down. 432 Park's perimeter columns are 5 ft 4 in deep at the bottom and 20 in at the top.
- Spandrel
- The beam in the outside wall between one floor's windows and the next. At 432 Park the spandrels and columns form the white grid.
- Slab, flat plate
- A floor of solid concrete. A flat plate has no beams under it; 432 Park's are 10 in thick, 18 in on the upper floors.
- Core
- The stiff tube in the middle of a tower, around the lifts and stairs. At 432 Park it's concrete, 30 ft square with 30 in walls.
- Tube in a tube
- A tower with two stiff tubes, the core inside and the perimeter frame outside, working together.
- Moment frame
- Columns and beams joined rigidly, so the grid itself resists leaning. 432 Park's facade grid is one.
- Outrigger
- A very stiff arm, here two stories deep, that ties the core to the outer frame so the whole width of the tower resists bending.
- Slenderness
- Height divided by width. 432 Park's is about 15 to 1.
- Vortex shedding
- Wind passing a tall shape peels off its sides in swirls that alternate left and right, pushing the tower side to side in rhythm.
- Tuned mass damper
- A heavy weight near the top, tuned to the building's own sway, that moves against the motion to reduce what people feel.
- Rock anchor
- A steel tendon grouted into a hole drilled into rock, used to hold a foundation down.
- Rebar, coupler
- Steel bars that give concrete its strength in tension. A coupler is a sleeve that joins two bars end to end.
- Formwork
- The mold concrete is poured into. Self-climbing formwork lifts itself up the building with hydraulic jacks.
- psi
- Pounds per square inch: how much pressure concrete can take before crushing. Ordinary concrete is a few thousand psi; 432 Park's lower floors are 14,000.
- Topping out
- The moment the highest part of the structure is completed.