Step 4: strip top truss connected electric hoist, electric hoist connected to the power lift top truss bar, rigging mounted between the top bar and truss annular truss.
Step 4: Connect the top bar truss to the electric hoist, connect the electric hoist to the power supply, lift the top bar truss, and install the rope between the top bar truss and the ring truss.
Step 4: connect the top strip truss with the electric hoist, connect the electric hoist to the power supply, lift the top strip truss, and install the rigging between the top strip truss and the ring truss.