Take the example of B1 main bridge of national highway 108, it has a structure of 4 spans prestress concrete successive beam and its geological terrain is complicated as the height tolerance along the longitudinal bridge is big and one of the bridge is connected to tunnels.

The total erection height of scaffolding is 24 meters and the areas of the supporting brace are 27500, so ringlock scaffolding is the most optimized one to choose.

The spans, lifts, and transverse space of the line scaffolding are 1.5m and parts of the ringlock scaffolding frame can be adjusted by ledgers of 0.6 0.9 1.2 and 1.8 meters. The top of the standing tubes shall be set with top jack head and the main keel use S-150 to be placed in a transverse way.

The layout of the bridge structure in a transverse way.

According to ring lock scaffolding manuals, it is much more facile to erect the ringlock scaffolding on a terrain of the mountain, and other complex geographic lands as it can save a lot of human force and working time.