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The National Lift Tower (previously called the Express Lift Tower and known locally as the 'Northampton Lighthouse') is a lift testing tower built by the (Express Lift Company ) (a lifts division of the General Electric Company (GEC)) off the Weedon Road in Northampton, England. The structure was commissioned in 1978 with construction commencing in 1980, and was officially opened by Queen Elizabeth II on 12 November 1982. Since 1997 it has been a Grade II Listed Building. == Background == Designed by architect Maurice Walton of Stimpson Walton Bond, the tower is 127.45 metres (418.1 feet) tall, 14.6 m (47.9 ft) in diameter at the base and tapers to 8.5 m (27.9 ft) at the top. The only lift testing tower in Britain, and one of only two in Europe, it was granted Grade II listed building status on 30 October 1997, at the time making it the youngest listed building in the UK. In January 1997, the tower fell out of use after Express Lifts was taken over by Otis and subsequently closed. In 1999, the tower and surrounding land was sold to Wilcon Homes for development. From the time it was built one shaft was specifically used by the British Standards Institution (BSI) for type testing of lift safety components at the time under the BS5655 and BS EN81 standards. Safety Gear testing involved putting the lift cars (frame) into free fall conditions with rated mass at tripping speeds as required by the designers of the safety gear to ensure the lift cars decelerated and stopped within the requirements of the standard. Buffer testing involved impacting them with the maximum and minimum mass at tripping speeds to ensure decelerations were within that requirement by the standard in both cases the aim was to ensure if the lift ever went into free fall or uncontrolled downward movement the safety components stopped the lift without causing any serious injury to the occupant. BSI ceased using the test tower soon after the site was acquired for housing in 1997-98. The building is now privately owned and has been renamed the National Lift Tower. Following extensive renovation and repairs, the tower was re-opened for business in October 2009. The tower is used by lift companies for research, development, testing and marketing. As well as being a resource for the lift industry, the building is also available to companies requiring tall vertical spaces, for example companies wishing to test working-at-height safety devices. There are six lift shafts of varying heights and speeds, including a high speed shaft with a travel of 100 metres and a theoretical maximum speed of 10 m/s. The tower's renovation was officially completed in July 2010.〔(【引用サイトリンク】title=Northampton Lift Tower renovation completed )〕 Further building work was planned with planning permission being sought to build a visitor's centre incorporating a 100 seater auditorium and cafe. However, permission for this structure was denied by Northampton Borough Council in March 2012.〔("Northampton Lift Tower centre plans rejected" ) BBC News 13 March 2012〕 Abseiling at the tower has been going on since May 2011 with over £140,000 having been raised for charity in the period to May 2012. Northampton Borough Council has now granted approval for it to be used up to 24 times a year for abseiling.〔("Northampton lift tower gets permanent abseiling status" ) BBC News 3 September 2014〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「National Lift Tower」の詳細全文を読む スポンサード リンク
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