建筑安装工程中,屋面避雷网多采用镀锌圆钢、镀锌扁钢、镀锌钢管等,其中镀锌圆钢用得较多。屋面避雷网施工,以往多采用预埋支撑圆钢的办法。但这种施工方法有以下弊病:一是避雷网不容易控制在女儿墙中心线上。只要有1根支撑圆钢不在中心线上,避雷网也成不了一条直线。支撑圆钢露出墙面的高 In the construction and installation project, galvanized round steel, galvanized flat steel, and galvanized steel pipe are commonly used in roof lightning protection nets, among which galvanized round steel is used more. In the construction of roof lightning protection nets, the method of pre-buried round steel was used in many cases. However, this construction method has the following drawbacks: First, the lightning protection network is not easily controlled on the center line of the parapet. As long as there is one supporting round bar not on the center line, the lightning protection net cannot become a straight line. Supporting round steel exposed high wall