塔类构件,如输电线路组合电柱、铁塔、电视塔以及高耸钢筋混凝土支架、排架、管架等,由于高度和体积庞大,单个(片)构件刚度差,为避免高空作业,通常采取整体组合安装的方法。其吊装就位采用一般行走式起重机进行,常受地形、道路以及起重高度的限制,并且吊装件零星分散、 Tower components, such as transmission lines combined with electric columns, iron towers, television towers, and towering reinforced concrete supports, girders, pipe racks, etc., due to the high height and volume, the stiffness of single (piece) components is poor, in order to avoid working at height, usually take the whole Combination installation method. The hoisting is in place using a general walking crane, which is often limited by the terrain, roads and lifting height, and the lifting pieces are scattered and scattered.