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一般情况下 ,在高层建筑施工中采用附着式塔式起重机 ,塔机中心到建筑物外墙距离都按设计要求确定。但有时高层建筑工程结构复杂、施工现场条件差 ,考虑到拆塔时安全方便 ,实际使用时都适当增加了附着撑杆长度。考虑撑杆的压杆稳定性因素 ,采用金属格构式桁架 ,其长度最长达 14
Under normal circumstances, the use of attached tower crane in the high-rise building construction, tower crane center to the building wall distance according to the design requirements. But sometimes the high-rise building complex structure, the construction site conditions are poor, taking into account the safe and convenient demolition tower, the actual use of the appropriate increase in the length of the attachment stays. Consider the stability of the strut rod pressure factor, the use of lattice lattice truss, the length of up to 14