如何预防挑梁事故的发生刘智善，张寿民在各省、自治区、直辖市上报到劳动部的事故调查报告中，几乎每年均有挑梁倾覆事故，并造成人员伤亡。所谓“挑梁”．实际是一个杆件固定在一个支点上（如下图所示），将其长臂端尾部加以固定并放置配重，在短臂端头安装一个定滑轮，... How to Prevent the Occurrence of Beam Leak Incident Liu Zhizhan and Zhang Shoumin reported to the Ministry of Labor accident investigation report in all provinces, autonomous regions and municipalities directly under the central government and have caused incidents of human casualties almost every year. The so-called “pick the beam.” Actually a rod fixed to a fulcrum (as shown below), the long arm end of the tail to be fixed and placed on the counterweight, the short boom end to install a fixed pulley, ...