222
Global
Height rank
One Liberty Place
Philadelphia
Height 288.04 m / 945 ft
Floors 61
Official Name

The current legal building name.

One Liberty Place
Name of Complex

A complex is a group of buildings which are designed and built as pieces of a greater development.

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, 1987
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.

Postal Code
19103
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.

office
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.

steel
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
288.04 m / 945 ft
To Tip
288.04 m / 945 ft
Occupied
238.89 m / 784 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).

61
Floors Below Ground

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

4
Tower GFA

Tower GFA refers to the total gross floor area within the tower footprint, not including adjoining podiums, connected buildings or other towers within the development.

111,483 m² / 1,199,993 ft²
Rankings
#
222
Tallest in the World
#
37
Tallest in North America
#
35
Tallest in United States
#
3
Tallest in Philadelphia
#
89
Tallest Office Building in the World
#
25
Tallest Office Building in North America
#
24
Tallest Office Building in United States
#
2
Tallest Office Building in Philadelphia
#
17
Tallest Steel Building in the World
#
12
Tallest Steel Building in North America
#
11
Tallest Steel Building in United States
#
1
Tallest Steel Building in Philadelphia
Developer
Rouse Company
Architect
Structural Engineer
MEP Engineer
Huber Hunt & Nichols; LF Driscoll

Cladding

Fire Proofing

Grace Construction Products

Steel

CTBUH Initiatives

18 October 2012 - Awards Symposium Video

Videos

11 June 2013 | Philadelphia

In our journey from Chicago to New York, the United States, South Africa, Europe, the Mideast to Asia/China, the tall building has always been tied...

11 June 2013 | Philadelphia

In our journey from Chicago to New York, the United States, South Africa, Europe, the Mideast to Asia/China, the tall building has always been tied...

18 October 2012 | Philadelphia

The partnership between Charles Thornton and Richard Tomasetti has provided the backbone for many of the most dramatic and innovative tall buildings around the world....

18 October 2012 | Philadelphia

Never predictable, never simplistic, Helmut Jahn has developed a complex portfolio of iconic buildings around the world. Standout projects include the Sony Center in Berlin,...

18 October 2012

Never predictable, never simplistic, Helmut Jahn has developed a complex portfolio of iconic buildings around the world. Standout projects include the Sony Center in Berlin, Xerox Center in Chicago, Liberty Place in Philadelphia and the MGM Veer Towers in Las Vegas. Once defined as a modernist, he broke away from rigid labels to create his own blends of efficient structures, paving the way for a new era of sustainable buildings.