近些年来,许多城市的住宅楼、私房、甚至商店、工厂车间楼的阳台、窗户都安装上了铁笼.这样,虽在防盗方面起了一定作用,但是却严重影响市容市貌和房屋上面景观,更重要的是给安全留下隐患.这些五花八门的防盗网都是靠膨胀螺丝焊接而固定于墙上的,许多防盗网还飘出阳台、窗户四、五十厘米,用作放置花盆或杂物.如经多年风化锈蚀,加上防盗网上的重物负荷,有朝一日定会倒塌下来殃及无辜.同时也给消防安全带来隐患,还由于许多防盗网未设逃生门,是个名符其实的“鸟笼”,一旦发生火灾,即 In recent years, many urban residential buildings, private houses, and even shops, factory floor balcony, windows are installed on the cage.Thus, although the anti-theft has played a role, but it has seriously affected the appearance of the city and the housing above Landscape, more importantly, to the security risks. These various anti-theft network are based on expansion screws and fixed to the wall of the welding, many security net also floating out of the balcony, four or five centimeters of windows, used to place flower pots Or debris.After years of weathered corrosion, coupled with heavy loads on the security net, one day will collapse down to bring harm to innocent, but also to bring fire safety hazards, but also because many security net did not set the door to escape, is a name In fact, “bird cage” in the event of a fire, that is