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一九八九年十二月二十日,年平县政府家属楼施工工地上传来不幸:东山建筑公司塔吊配重启脱落、甩下四人:死亡一人,重伤一人、轻伤二人。这起重大伤亡事故,原因很简单:去年八月,东山建筑公司从文登第一建筑机械厂〈社办工厂〉购进塔吊,使用几个月后,发现其回转体顶端大滑轮轴承碎了,但由于转体顶端没留口,滑轮卸不下来。按设计,回转体顶端大滑轮处应有缺口便于拆
On December 20, 1989, the construction site of the Nianping County government building was uploaded with misfortune: the tower crane of Dongshan Construction Company rebounded and fell off four people: one was killed, one was seriously injured and two were slightly injured. The reason for this major casualty was simple: in August last year, Dongshan Construction Company purchased the tower cranes from Wendeng No. 1 Construction Machinery Factory, and after a few months of using it, discovered that the top sheave bearing of the revolving body was broken, However, due to the top of the swivel did not leave the pulley unloaded. According to the design, slewing body at the top of the pulley should have a gap for easy demolition