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Rogers Stirk Harbour + Partners

“...when you build a first-class office building, well-designed and in a location that’s served by a massive amount of mass transit, a beautiful neighborhood surrounding it, with 24/7 occupancy, with retail spaces and mass transit around, ultimately, it always fills up...”

Larry Silverstein, Silverstein Properties

The Freedom Tower, and towers by Rogers Stirk Harbour + Partners, Foster + Partners and Maki Associates spiral around the pools in descending height order. The masterplan for the World Trade Center (WTC) site in Manhattan, New York, was designed by Studio Daniel Libeskind and focuses on the memorial – two reflecting pools in the centre of the site.

The architectural concept for 3 World Trade Center was realised as part of the wider context of the WTC masterplan, and represents a resolution of the varying requirements of the New York Port Authority and the client, Silverstein Properties.

3 World Trade Center is on a site bounded by Greenwich Street to the west, Church Street to the east, Dey Street to the north and Cortlandt Street to the south. It is opposite the WTC Memorial and Cultural Center, and at the heart of the cluster of buildings which surround the memorial. The brief for 3 World Trade Center outlined the building’s function as the site’s commercial core. The tower had to address the issue of balancing retail and office space, while also complementing and acknowledging the WTC memorial.

The building has an orthogonal relationship to the main space between the proposed memorial water pools. To complement this relationship, the central zone of the building has been reduced in mass as it rises towards the sky. The effect is a stepped profile which accentuates the building’s verticality, relative to the memorial site and is sympathetic to the height and positions of the neighbouring buildings.

The design includes five trading floors, 54 office floors (totalling 2.1 million sq ft (195,096m²) and five retail levels, as well as eight mechanical floors which serve the trading and office floors, 37 passenger lifts and two principal stairwells. The lower part of the building – the ‘podium building’ – contains the tower’s retail element and the trading floors. The upper levels of the tower hold the office space. ‘Live’, active façades, at street level, will enable the free-flowing movement of shoppers. There will be two below-grade retail levels and three retail levels above the ground floor, served by two lifts and four stairwells.

To maximise sustainability in terms of the building’s day-to-day functioning, similar ‘green design’ features as those included in the design of 7 World Trade Center have been incorporated. The design team has ensured that energy use and costs are significantly reduced compared to typical Manhattan office buildings.

The building is ‘Gold’ Certificated for Leadership in Energy and Environmental Design from the U.S. Green Buildings Council.

The design concept for the 71-storey tower addresses its central position on the WTC site. The building has an orthogonal relationship to the main space between the proposed memorial water pools. To complement this relationship, the central zone of the building has been reduced in mass as it rises towards the sky. The effect is a stepped profile which accentuates the building’s verticality relative to the Memorial site.

The main components include five trading floors, 54 office floors (totalling 2.1 million sq ft) and five retail levels, as well as eight mechanical floors which serve the trading and office floors, 37 passenger lifts and two principal stairwells.

The lower part of the building – the ‘podium building’ – contains the tower’s retail element and the trading floors. The upper levels of the tower hold the office space.

The ground floor, at street level, will have ‘live’, active façades which will enable the free-flow movement of shoppers. There will be two below-grade retail levels and three retail levels above the ground floor, and these will served by two lifts and four stairwells. The ground-floor lobby, which is on Greenwich Street, will offer visitors and tenants a ‘big picture window’ onto the WTC memorial.

To maximise sustainability in terms of the building’s day-to-day functioning, similar ‘green design’ features as those included in the design of 7 World Trade Centre have been incorporated. The design team are committed to ensuring that energy use and costs could be significantly reduced compared to typical Manhattan office buildings.

It is hoped that 175 Greenwich Street – like 7 WTC – will be certified 'Gold' under the US Green Building Council’s Leadership in Energy and Environmental Design (LEED) programs.

The design of the structure of 175 Greenwich Street, as expressed by the mainframe of the east and west elevations, gives a clearly defined and legible form to the building. The external supporting structure is a load-sharing diagonal element on a 16-storey module that also emphasises the verticality of the tower. This divides into a finer grain at the corner elements.

All four corners of the tower are expressed in the same way with the use of symmetrical hangers with diagonal and vertical elements. The hung corners, divided into four-storey segments, liberate the floorplate edges creating column-free corners within the office spaces of the tower.

Two set-backs are created to achieve variation on the floorplate size higher up in the building. The height of the ‘shoulder’ at the southern corner has been defined in relationship to its proximity to Tower 4 at 150 Greenwich Street – and as a response to the way in which it is cut back – thereby making an architectural gesture towards the Freedom Tower diagonally opposite. This achieves a greater separation between the different towers as well as enhanced views for occupiers at higher levels.

At ground level, the use of a triple height cable-net façade to the West, onto Greenwich Street, reinforces the transparency of the entrance to the lobby and the combined retail and transit hall facing the Memorial Park.

In the transit hall, the corner of Greenwich and Cortlandt Streets is animated by the use of exposed glazed lifts and glass floor landings where they meet the escalators. The transit hall forms part of the access to the transport hub and connects Towers 2, 3 and 4 at the below grade levels through a retail concourse (designed by Santiago Calatrava).

“...when you build a first-class office building, well-designed and in a location that’s served by a massive amount of mass transit, a beautiful neighborhood surrounding it, with 24/7 occupancy, with retail spaces and mass transit around, ultimately, it always fills up...”

Larry Silverstein, Silverstein Properties

The Freedom Tower, and towers by Rogers Stirk Harbour + Partners, Foster + Partners and Maki Associates spiral around the pools in descending height order. The masterplan for the World Trade Center (WTC) site in Manhattan, New York, was designed by Studio Daniel Libeskind and focuses on the memorial – two reflecting pools in the centre of the site.

The architectural concept for 3 World Trade Center was realised as part of the wider context of the WTC masterplan, and represents a resolution of the varying requirements of the New York Port Authority and the client, Silverstein Properties.

3 World Trade Center is on a site bounded by Greenwich Street to the west, Church Street to the east, Dey Street to the north and Cortlandt Street to the south. It is opposite the WTC Memorial and Cultural Center, and at the heart of the cluster of buildings which surround the memorial. The brief for 3 World Trade Center outlined the building’s function as the site’s commercial core. The tower had to address the issue of balancing retail and office space, while also complementing and acknowledging the WTC memorial.

The building has an orthogonal relationship to the main space between the proposed memorial water pools. To complement this relationship, the central zone of the building has been reduced in mass as it rises towards the sky. The effect is a stepped profile which accentuates the building’s verticality, relative to the memorial site and is sympathetic to the height and positions of the neighbouring buildings.

The design includes five trading floors, 54 office floors (totalling 2.1 million sq ft (195,096m²) and five retail levels, as well as eight mechanical floors which serve the trading and office floors, 37 passenger lifts and two principal stairwells. The lower part of the building – the ‘podium building’ – contains the tower’s retail element and the trading floors. The upper levels of the tower hold the office space. ‘Live’, active façades, at street level, will enable the free-flowing movement of shoppers. There will be two below-grade retail levels and three retail levels above the ground floor, served by two lifts and four stairwells.

To maximise sustainability in terms of the building’s day-to-day functioning, similar ‘green design’ features as those included in the design of 7 World Trade Center have been incorporated. The design team has ensured that energy use and costs are significantly reduced compared to typical Manhattan office buildings.

The building is ‘Gold’ Certificated for Leadership in Energy and Environmental Design from the U.S. Green Buildings Council.

Key Facts

Show Team

Team

Elena Arzua Tourino
Anabela Chan
Martin Cook
Kelly Darlington
Mike Davies
Simon Davis
Laurence Day
German de la Torre
Ainhoa Diaz
Philip Dennis
Mike Fairbrass
Alfonso Galan
Nick Hancock

Ivan Harbour
Mimi Hawley
Dennis Ho
Lennart Grut
Amo Kalsi
Daniel Lewis
Massimo Malinale
Tim Mason
Jon Mercer
Beatriz Olivares
Alison Oktay
Joseph Park
Richard Paul

Tosan Popo
Georgina Robledo
Dan Rogers
Richard Rogers
Laura Salisbury
Neil Southard
Luke Stanley
Graham Stirk
Angela Tobin
Matthew Wilmar
Elizabeth Young

Hide Team

Date
2006-ongoing

Client
Silverstein Properties Inc

Location
New York, USA

Height
350m

Site Area
5,574m²

Gross Floor Area
260,129m²

Net Lettable Area
195,096m²

Structural Engineer
WSP Cantor Seinuk

Services Engineer
Jaros Baum & Bolles

Architect of Record
Adamson Associates

Dynamic Loading Consultants
Weidlinger Associates Incorporated

Security Consultants
Ducibella Vanter & Santore