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目前大多数建筑物都采用了预制水泥楼板。在大厅、会议室、办公室等处如何在预制水泥板上安装吊扇呢?下面介绍的方法既简单易行又安全牢靠。一般预制楼板长3600mm,厚160mm,宽580 mm,其中四个空心圆孔直径108mm,圆孔间隔25mm,最边上的圆孔中心距楼板边沿约35 mm(各地预制板略有不同)。安装吊扇时,首先选定位置,其次在此位置附近寻找楼板的接缝。一般屋顶在内粉时有1～2 cm厚的沙灰,干后由于水泥楼板和沙灰的热胀冷缩效应不一样或吸水能力的差异,在水泥
Most buildings currently use precast concrete floors. How to install ceiling fans on prefabricated cement boards in halls, conference rooms, offices, etc. The methods described below are both simple and reliable. The general prefabricated floor slabs are 3600mm long, 160mm thick and 580mm wide, of which four hollow circular holes are 108mm in diameter, and the circular holes are 25mm apart. The center of the circular hole on the most edge is about 35mm from the edge of the floor (different prefabricated plates in different places). When installing the ceiling fan, first select the location and then find the seams of the floor near this location. Generally, the roof has 1 to 2 cm thick sand ash in the inner powder. After the cement is dry, the thermal expansion and contraction effect of the cement floor and the sand ash is different or the difference in water absorption capacity is different.