Located in London's financial district, it is 591 ft. (180 m.) tall, with 40 floors, and symbolised the start of a new high-rise construction boom in London. Designed by Lord Norman Foster, his then partner Ken Shuttleworth, and Arup engineers, and was constructed by Skanska of Sweden. Despite its overall curved glass shape, there is only one piece of curved glass on the building -- the lens-shaped cap at the very top.
The building uses energy-saving methods which allow it to use half the power a similar tower would typically consume. Gaps in each floor create six shafts that serve as a natural ventilation system for the entire building even though required firebreaks on every sixth floor interrupt the "chimney." The shafts create a giant double glazing effect; air is sandwiched between two layers of glazing and insulates the office space inside.
The building uses energy-saving methods which allow it to use half the power a similar tower would typically consume. Gaps in each floor create six shafts that serve as a natural ventilation system for the entire building even though required firebreaks on every sixth floor interrupt the "chimney." The shafts create a giant double glazing effect; air is sandwiched between two layers of glazing and insulates the office space inside.
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