One Madison Park

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Height: Architectural 189.3 m / 621 ft
Height: Occupied 176.4 m / 579 ft
Height: To Tip 195.7 m / 642 ft
Floors Above Ground 50
Floors Below Ground 1
# of Elevators 2
Tower GFA 16,763 m² / 180,435 ft²
# of Apartments 69


Official Name One Madison Park
Other Names The Saya
Structure Type Building
Status Completed
Country United States
City New York City
Street Address & Map 20 East 23rd Street
Postal Code 10010
Building Function residential
Structural Material concrete
Proposed 2005
Construction Start 2006
Completion 2010
Official Website One Madison Park
Rankings Click arrows to view the next taller/shorter buildings
Regional Ranking #342 Tallest in North America

Companies Involved

Owner CIM Group; HFZ Capital Group; Related Companies
Developer Slazer Enterprises LLC
Design CetraRuddy Architecture
Structural Engineer
Design WSP Cantor Seinuk
MEP Engineer
Design MGJ Engineering, P.C.
Main Contractor Bovis Lend Lease
Other Consultant
• Building Monitoring Vidaris, Inc.
Façade Vidaris, Inc.
• Roofing Vidaris, Inc.

About One Madison Park

One Madison Park is situated in a unique location on the Manhattan grid, fronting on East 23rd Street, a busy cross town thoroughfare—and at the foot of Madison Avenue, a major north–south thoroughfare that begins at 23rd Street, directly to the north. The tower acts as an axial icon on Madison Avenue, making the tower visible from great distances at the street level. The architectural challenge was to create a modern form that was respectful to the context of the Madison Square Park neighborhood while creating a visual dialogue with the adjacent historical high-rise building such as the Flatiron Building (1902) and the facing Met Life Tower (1909).

In order to allow construction to begin before the site could be entirely cleared it was decided that a portion of the tower would have to cantilever over an existing three-story building adjacent to the tower on its eastern side. The design team seized upon this idea to give the tower its unique configuration. From the main square mast of the tower clad in dark bronze glass, another shaft clad in white and clear glass is partially inserted and cantilevered from the main shaft in blocks ranging from four to six stories. The spaces between these blocks allowed for full floor residences with terraces built out onto the roof of the block below, that wrap around the north and east sides of the apartment.

The tower sits on a five-story base that holds commercial and service uses on the ground floor. Above the first floor, the base incorporates the main mechanical spaces and two levels of amenity spaces for the residents, which includes a fitness center, indoor pool, spa, and a private lounge with a terrace overlooking Madison Park.

Due to the placement of the tower in the middle of the site, each side could have windows opening to expansive views. Lateral bracing usually located around the perimeter was instead placed in the center, forming a cruciform of shear walls, buried between rooms and shafts minimizing the impact to room layouts. This integration of efficient space planning and structure gives each room within the homes an open expansive feeling focused on the city views beyond. High efficiency glazing was incorporated into the exterior skin to reduce solar heat gain with automated solar shading in each living room. An abundance of natural light is brought into every space of the tower which helps to minimize the need for artificial lighting. Due to its perimeter location, even the elevator lobby on every floor has a south facing window to bring in light and views.

The building’s footprint is 15.25m x 16.15m (50ft x 53ft) and is described as a slender tower with a height-to-width ratio of 12:1. Therefore, the lateral wind and seismic force-resisting system was the major engineering challenge. Naturally the shear wall stiffness and strength had to be maximized for this slender building while supporting the architectural design. This has been achieved by a combination of optimizing the configuration of the shear walls and using high performance concrete.

Due to its high slenderness ratio, the building’s lateral dynamic movement is mitigated by the design and the incorporation of a Tuned Liquid Damping System to reduce the acceleration of building motions. The system is comprised of three cast-in-place reinforced concrete tanks filled with water and incorporated into the building structure at roof level. More specifically the tanks are known as Tuned Liquid Column Dampers which are U-shaped to maximize their effect while occupying less floor area. The dampers were designed to provide approximately 3% additional damping to the building, and reduce the building accelerations to acceptable levels.

CTBUH Initiatives

The Current State of Slender Buildings in NYC
30 Jul 2015 – Event Report

One Madison Park Chosen as Featured Building
Aug 2011 – Featured Tall Building

Research Papers

Apartments in Skyscrapers: Innovations and Perspectives of their Typology Development
26 Oct 2015 – Global Interchanges: Resurgence of the Skyscraper City

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