Icon
New York City United States
Height 157.44 m / 517 ft
Floors 42
Official Name

The current legal building name.

Icon
Other Names

Other names the building has commonly been known as, including former names, common informal names, local names, etc.

785 8th Avenue
Type

CTBUH collects data on two major types of tall structures: 'Buildings' and 'Telecommunications / Observation Towers.' A 'Building' is a structure where at least 50% of the height is occupied by usable floor area. A 'Telecommunications / Observation Tower' is a structure where less than 50% of the structure's height is occupied by usable floor area. Only 'Buildings' are eligible for the CTBUH 'Tallest Buildings' lists.

Building
Status
Completed
Architecturally Topped Out
Structurally Topped Out
Under Construction
Proposed
On Hold
Never Completed
Vision
Competition Entry
Canceled
Proposed Renovation
Under Renovation
Renovated
Under Demolition
Demolished
Completed, 2009
Country

The CTBUH follows the United Nations's definition of Country, and thus uses the lists and codes established by that organization.

City

The CTBUH follows the United Nations's definition of City, and thus uses the lists and codes established by that organization.

Address
Postal Code
10036
Function

A single-function tall building is defined as one where 85% or more of its usable floor area is dedicated to a single usage. Thus a building with 90% office floor area would be said to be an "office" building, irrespective of other minor functions it may also contain.

A mixed-use tall building contains two or more functions (or uses), where each of the functions occupy a significant proportion of the tower's total space. Support areas such as car parks and mechanical plant space do not constitute mixed-use functions. Functions are denoted on CTBUH "Tallest Building" lists in descending order, e.g., "hotel/office" indicates hotel function above office function.

residential
Structural Material

Steel
Both the main vertical/lateral structural elements and the floor spanning systems are constructed from steel. Note that a building of steel construction with a floor system of concrete planks or concrete slab on top of steel beams is still considered a “steel” structure as the concrete elements are not acting as the primary structure.

Reinforced Concrete
Both the main vertical/lateral structural elements and the floor spanning systems are constructed from concrete which has been cast in place and utilizes steel reinforcement bars.

Precast Concrete
Both the main vertical/lateral structural elements and the floor spanning system are constructed from steel reinforced concrete which has been precast as individual components and assembled together on-site.

Mixed-Structure
Utilizes distinct systems (e.g. steel, concrete, timber), one on top of the other. For example, a steel/concrete indicates a steel structural system located on top of a concrete structural system, with the opposite true of concrete/steel.

Composite
A combination of materials (e.g. steel, concrete, timber) are used together in the main structural elements. Examples include buildings which utilize: steel columns with a floor system of reinforced concrete beams; a steel frame system with a concrete core; concrete-encased steel columns; concrete-filled steel tubes; etc. Where known, the CTBUH database breaks out the materials used in a composite building’s core, columns, and floor spanning separately.

concrete
Height

Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the architectural top of the building, including spires, but not including antennae, signage, flag poles or other functional-technical equipment. This measurement is the most widely utilized and is employed to define the Council on Tall Buildings and Urban Habitat (CTBUH) rankings of the "World's Tallest Buildings."

Architectural
157.44 m / 517 ft
To Tip
157.44 m / 517 ft
Occupied
132.99 m / 436 ft
Floors Above Ground

The number of floors above ground should include the ground floor level and be the number of main floors above ground, including any significant mezzanine floors and major mechanical plant floors. Mechanical mezzanines should not be included if they have a significantly smaller floor area than the major floors below. Similarly, mechanical penthouses or plant rooms protruding above the general roof area should not be counted. Note: CTBUH floor counts may differ from published accounts, as it is common in some regions of the world for certain floor levels not to be included (e.g., the level 4, 14, 24, etc. in Hong Kong).

42
Floors Below Ground

The number of floors below ground should include all major floors located below the ground floor level.

1
# of Apartments

Number of Apartments refers to the total number of residential units (including both rental units and condominiums) contained within a particular building.

122
# of Elevators

Number of Elevators refers to the total number of elevator cars (not shafts) contained within a particular building (including public, private and freight elevators).

2
Rankings
#
214
Tallest Residential Building in North America
#
168
Tallest Residential Building in United States
#
66
Tallest Residential Building in New York City
#
343
Tallest Concrete Building in North America
#
88
Tallest Concrete Building in New York City
Construction Schedule
2005

Proposed

2005

Construction Start

2009

Completed

Owner/Developer
785 Partners LLC; Esplanade Capital
Architect
Ismael Leyva Architects
Structural Engineer
Ysrael A Seinuk PC
MEP Engineer
Ettinger Engineering Associates
Times Square Construction, Inc.

Formwork

Videos

21 October 2010 | New York City

Prof. Seinuk is known as a worldwide authority on the design and construction of high-rise concrete and steel buildings. A reflection of his life's work...

About Icon

The building sits on a particularly narrow site. Because of its 15:1 slenderness ratio (max ratio 18:1 on its east end), this building is one of the slender structures of the world. The building was designed with due consideration given to its dynamic behavior. Designing an effective lateral system was a challenge, achieved by judicious placement of shear walls and the maximum possible utilization of slab-frame action. High strength concrete was used to increase stiffness.

The innovative concrete structure was clad in a butt-glazed curtain wall system in order to maximize the usable square footage inside an already slender floor plate, creating apartments that have frontage on more than one façade. A skillful use of architectural elements like the curtain wall coupled with structural cantilevers allows increased floor area at the top of the building. A row of cascading glass balconies on the east and west façades culminate in an iconic rooftop bulkhead transforming the building into a “glass artifact.”

21 October 2010 | New York City

Prof. Seinuk is known as a worldwide authority on the design and construction of high-rise concrete and steel buildings. A reflection of his life's work...