目前,建筑施工工地的垂直运输多半采用井字架,然而,不少施工单位不按照安全技术操作规程搭设,往往造成重大伤亡事故。1980年福建厦门某工,搭设一个48米高的井字架,由于基础不平不实,又未及时拉设缆风绳,当搭到25米高时,被一阵大风吹倒,正在架上操作的9名工人当场摔死5人,重伤3人。1980年8月,四川省自贡市某公司二队当拆除20米高 At present, most of the vertical transportation of construction construction sites adopts wells. However, many construction units do not set up according to the safety technical regulations, which often results in major casualties. In 1980, a worker from Xiamen, Fujian Province, set up a 48-meter-high derrick rack. Because the foundation was uneven and the cable wind rope was not pulled in time, when it reached a height of 25 meters, it was blown down by a gale and was operating on a stand. The nine workers killed five people and injured three seriously. In August 1980, the second team of a company in Zigong City, Sichuan Province, was demolished to a height of 20 meters.