2. Cup Lock Scaffold: the force of the horizontal and the vertical is in the axis, the structure is reasonable and the square is safe; the ledger blade is placed in the fastening cups of the vertical, and the accessories are not easy to lose and the loss is small; the construction speed is quicker than the tubular coupler scaffold; there are many specifications, and the construction speed is fast with multiple span and specification Fixed; the bearing force is increased by more than 15% compared with the fastener type steel pipe scaffold, so it is necessary to support the steel pipe scaffold The required bridges and basements are often used; scaffolds with curved plane can be built.