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电缆桥架穿墙过板留洞,通常采取预留洞或操作人员现场打洞两种方式,待墙壁刮白后将桥架穿越即可。这样做除加大洞口内防火堵料的填塞量外,还造成了洞口周边因扩凿洞壁出现槎口或砌块松动等现象,直接影响工程质量。通过采用镀锌铁皮围成矩形桶状制成洞壁护口,经工程实践,使用效果不错。一、制作与安装采用厚度为1mm的镀锌铁皮围成矩形筒状,其内径为桥架外径四周加50mm。水平
Cable bridge through the wall hole to leave holes, usually to reserve hole or operator holes in the field two ways to be scratched the wall after the bridge can be traversed. In addition to increasing the hole in the fire blocking material to do so in addition to filling, but also caused the hole around the wall due to the expansion hole or block loosening phenomenon, a direct impact on project quality. Through the use of galvanized sheet metal enclosures into a rectangular barrel wall made of mouth protection, engineering practice, the use of good results. First, the production and installation Thickness of 1mm galvanized sheet metal enclosing a rectangular tube, the diameter of the outer diameter of the bridge plus 50mm. Level