塔吊设计计算说明书更新(共45页)

塔吊设计计算说明书更新Pvv = 1.2 X 250.X 0.32 = 96NYc = 47m起重臂部份综合S Pvv = 9936Nf.塔顶人轮=；X 1.48X6.5= 4.81m23 = 0.