我们施工的40米高的砖烟囱,原定要用12×12厘米方木里井架上料,兼作操作平台,人员从里井架搭木梯上下。这种方案约需4.5立方米木料,施工成本较高,操作互相干扰并影响工期。为降低施工成本,缩短工期,我们采用了圆钢活动外挂架(图1)供技工站在烟囱外围砌砖,采用活动上料架(兼放料平台),供普工放料用,与砌砖互 The 40-meter-high brick chimney we constructed was originally scheduled to be loaded with a 12 x 12 cm square timber derrick, serving as a platform for operations. This program requires about 4.5 cubic meters of timber, the construction cost is high, and the operations interfere with each other and affect the schedule. In order to reduce construction costs and shorten the construction period, we have adopted round steel activity racks (Figure 1) for technicians to lay bricks around the chimney, and use active loading racks (and discharge platforms) for general workers to discharge materials and build bricks. Brick mutual