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| Notable Features | |
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Precast concrete loss-form construction system (slabs) |
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Precast concrete beams |
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Raised floor system |
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| Basic Information | |
| Location : | |
| 71 Frenchurch Street, London, UK | |
| Building Type : | |
| Office | |
| Contract Period : | |
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1995-2000 |
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| Contract Sum : | |
| £70 million | |
| Gross Floor Area : | |
| 24,155 m2; 260,000 ft2 | |
| Gross External Floor Area : | |
| 34,000 m2 | |
| Client : | |
| Lloyds Register of Shipping | |
| Project Manager : | |
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Insignia Richard Ellis Ltd. |
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| Architect : | |
| Richard Rogers Partnership | |
| Structural Engineer : | |
| Anthony Hunt Associates Ltd. | |
| E&M Consultant : | |
| Arup | |
| Quantity Surveyor : | |
| AYH Partnership | |
| Lighting Design : | |
| Lighting Design Partnership International | |
| Landscape Architect : | |
| Edward Hutchison | |
| Main Contractor : | |
| Sir Robert McAlpine Ltd. | |
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| Overview | |
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| The new project comprises two main towers of 11 and 14-storeys, a further 7-storeys building, are housed behind the retained façade of Coronation House, and a five-storey block on the street. | |
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| Awards | |
| Aluminum Imagination Awards, 2001 | |
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| The Structure |
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| The structure of the main office building consists of an exposed precast concrete frame (beams and floor shells) with elements that were filled with in-situ concrete to form a composite construction. This unique combination of precast and in-situ concrete meant that the structure could be constructed as a braced frame without the need for bracing walls in the cores. The lift cores are supported on a slender structural steel frame that takes all its lateral stability from the main concrete structure. The three levels of the lift motor rooms have fully welded steel frame to provide adequate support. |
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| Precast Concrete Loss Form For Slabs |
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| The structure of the 12-storey office building comprises precast concrete beams and floor shells filled with in-situ concrete. The soffits of the floors take the form of a series of vaults spanning between concrete ribs at 3m centers. The ribs, in turn, span between the spine beam and the perimeter columns. The vaults are exposed to allow the thermal mass of the concrete to contribute to environmental control at peak times. |
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| Contact of Contractor |
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Sir Robert
McAlpine Ltd. |
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| Sources |
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Powell K.,
New London Architecture, Merrell Publisher Ltd., London, 2001. |
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Powell K.,
Richard Rogers Complete Works, Volume two, Phaidon Press, London, 2001. |
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The
Architects’ Journal, 10 January 2002, pp26-43. |
| www.ajspecification.com |
| www.skyscrapers.com |
| www.richardrogers.co.uk |
| www.anthonyhuntassociates.co.uk |
| www.sir-robert-mcalpine.com |
| www.arup.com |
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