How Balanced Cantilever Bridges Are Built

The inventor of the cantilever bridge construction method was an absolute genius.

This technique allows a bridge to extend outward from the top of its piers,

without any temporary supports underneath. First, workers build the starter segment,

called the zero block, by tying steel bars and pouring concrete on top of the pier.

Then, they install steel girders, sliding tracks, and the main truss,

followed by the suspension basket. Inside this hanging basket, they set up formwork,

tie more rebar,

and leave holes for the tension cables. Next, high-strength

steel strands are threaded through the ducts and stretched

tight with hydraulic jacks. The excess steel is trimmed off,

and the anchor points are sealed with high-strength concrete.

To keep the bridge balanced,

construction happens on both sides at the same time. Once one segment is complete,

the basket slides forward to build the next, block two,

block three, and so on,

repeating the same steps until both sides meet perfectly in the middle.

The entire bridge is built without scaffolding or cranes,

just a hanging basket inching forward through the air,

creating a massive bridge suspended in perfect balance.