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Monday, August 17, 2015

Sail-like facades for Shenzhen Tower, China

Compiled by Team IAnD
Photography: Courtesy Pei Cobb Freed & Partners

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New York-based Pei Cobb Freed & Partners Architects unveil their design for iconic Shenzhen tower to house China Minmetals Corporation; one of the world’s leading metal companies and the largest iron and steel trader in China…

Carefully sited to be respectful of its strictly orthogonal neighbours, and distinguished by its gently sloping north and south facades, which extend above the main roof to form expressive apexes at the northeast and southeast corners, the new 29-storey tower allows for extensively landscaped public space at ground level.

Resembling wind-filled sails, the arcing facades are balanced by a contrasting parallelogram geometry that creates mast-like silhouettes on the other two sides. “Our aim was to evoke a timeless form,” says Yvonne Szeto, design partner for the project. “A sail is both graceful and auspicious, taking its energy freely from nature.”

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The material qualities of the building expand on this theme. The curtain wall system enclosing the sail forms includes floor-to-ceiling vision glass and matching shadow-box glazing at the spandrels, creating a light and open effect. The mast forms combine vision glass and stone spandrels, with larger expanses of stone at the base that suggest ballast for the sails and bring a sense of solidity and dignity to the entry levels of the tower. 

The structural design adds its own expression to the sail imagery through exterior lateral bracing: two X-braced groupings of 12 floors each are separated by three horizontal single-storey braced truss floors, recalling a framework of nautical ties and battens.

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Four-storey-high porches on the tower’s north and south sides serve as signature gateways, leading to a generous public open space with a terraced landscape that incorporates water features and public art, integrating active uses on the ground floor with retail on the floor below. The extensively developed landscape is part of an overall sustainable strategy that includes a high-efficiency exterior wall, operable windows, and internal shading devices. The building is expected to achieve LEED Gold.

The building is scheduled to be completed in 2017.

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