十三冶二公司砌筑45米高的砖烟囱,是用外脚手悬吊工作台施工的,操作既方便又安全。悬吊工作台由四层单排脚手架粗成(图17),在靠烟囱周边的一排脚手架四角上,吊挂四个1.5吨的倒链,工作台的四角(八个点)吊挂在倒链的吊钩上,工作台需要升高时,由四个人在四角拉动倒链即可。因倒链工作高度有限,为了倒移倒链不占砌筑有效时间, The 13-meter-two company built a 45-meter-high brick chimney, which was constructed by hanging the workbench with an external foot. The operation was convenient and safe. The suspension table is roughly made of four-tiered single-row scaffolding (Figure 17). On the four corners of a row of scaffolding around the chimney, four 1.5-tonne inverted chains are hung, and the four corners (eight points) of the worktable are hung on the On the hook of the reverse chain, when the work table needs to be raised, four people can pull the chain at the four corners. Due to the limited height of the reverse chain work, in order to reverse the reverse chain, it does not occupy the effective time of masonry.