Abstract
During 1970s-1990s large amount of multi-storey buildings have been built without elevators in the cities of China. It is a great social demand that the elevator installation will effectively improve the living quality for aging. However, there are many technical restrictive conditions on site, which may cause costly or unavailable implementation in real project of elevator installation. This paper investigates over 3491 cases online and 66 cases in field survey in Beijing. Through discusses two pairs of comparison of elevator installation, it shows that the HALF elevator is more probability than ALIGN installation to meet the condition of the existing buildings, and the percentage of the ATTACHED elevator is higher than BRIDGED.
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