One Raffles Quay North Tower

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Height: Architectural 245 m / 804 ft
Height: To Tip 245 m / 804 ft
Floors Above Ground 50
Top Elevator Speed 7 m/s


Official Name One Raffles Quay North Tower
Name of Complex One Raffles Quay
Structure Type Building
Status Completed
Country Singapore
City Singapore
Street Address & Map 1 Raffles Quay
Postal Code 048583
Building Function office
Structural Material composite
Construction Start 2002
Completion 2006
Rankings Click arrows to view the next taller/shorter buildings
Regional Ranking #358 Tallest in Asia
National Ranking #9 Tallest in Singapore
City Ranking #9 Tallest in Singapore

Companies Involved

Owner/Developer Cheung Kong Holdings; Hongkong Land Limited; Keppel Land International Ltd; One Raffles Quay Private Limited
Design Kohn Pedersen Fox Associates
Architect of Record Architects 61
Structural Engineer
Design Meinhardt
MEP Engineer
Design Meinhardt
Main Contractor Obayashi Corporation
Other Consultant
Façade Heintges & Associates
• Stormwater Management Fast Flow Systems Pte Ltd

About One Raffles Quay North Tower

One Raffles Quay (ORQ) was designed and constructed to overcome several unprecedented engineering challenges posed by the presence of existing twin subway tunnels running below the site and the highly variable and soft ground conditions.

At the planning stage, the massing of the North Tower was rotated relative to the site to allow the shortest structural transfer span and most balanced building load transmission to bridge across the subway tunnels. To transfer the 50-story tower loads, conventional transfer structures would have been too deep and would have obstructed the ground level lobby. To overcome this challenge the transfer of interior tower loads is achieved through the central box core acting as a transfer structure—probably a world first for a building of such height and complexity. At the perimeter of the tower, loads are transferred through visible and iconic mega steel trusses and raking columns in the main lobby.

The presence of up to 35-meter (115-foot)- deep layers of soft marine clay below the site presented a significant challenge to the construction of the basements since the slightest excessive ground movement could impair the operation and safety of the subway system. The design solution comprised a rigid perimeter diaphragm wall-retention system coupled with two rows of Shielding Walls (protective non-load bearing diaphragm walls) adjacent to the subway tunnels. This—along with comprehensive real time monitoring of ground, wall, struts and subway tunnel movements—allowed excavation and substructure construction with less than 15mm tunnel movement and without any adverse impact on the subway.

CTBUH Initiatives

CTBUH / Nakheel Asia Tour Report
19-29 Apr 2007 – Tour Report

CTBUH Releases Tallest Buildings Completed in 2006
Dec 2006 – CTBUH Journal Paper

Research Papers

Tallest Buildings Completed in 2006
Dec 2006 – CTBUH Research

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