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City Hall - some key facts

Height of the building: 45m
No. of floors: 10 floors above the ground
Gross floor area: 185,000 sq ft/18,000 sq m (approx)
Nett lettable floor area: 130,000 sq ft/12,000 sq m (approx)
Steelwork: Structural frame - 2100 tons
Reinforced - 1950 tons
Concrete (core): 13,100 sq m
Cladding: 7,300 sq m of triple glazed low emissivity coated clear glass, incoporating shading devices
Heat insulation: Average value = 0.7-0.8 W/m_.k
Angle of glass front inclination: 31 degrees
Diameter of circular glass facade: 45m
Environmental strategy: Windows open for natural ventilation, bore hole water cooling, heat recovery, displacement ventilation system, no chillers required
Energy consumption:

Energy consumptions for GLA's environmental systems is less than half levels in DETR good practice office guide.

The radical shape of the building minimses the surface area (approx 25 per cent less than an equivalent rectangular building). is self shading and the high performance facade ensures excellent energy efficiency.
Electrical consumption: Greatly reduced as a result of using cold ground water instead of refrigeration to air condition the building. Saving use of mains water, the water is extracted through two bore holes from the water table beneath London and is used to cool the building and is then used for flushing the toilets.
Architect: Foster and Partners
Construction Managers: MACE
Structural, services, facade, fire, communications and acostics engineers: Arup & Partners
Cost consultants: Davis Langdon & Everest and Mott Green & Wall
Landscape architects: Townshends

 
<A 'green' building City Hall main page How the building was chosen>

 

 

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