मचान 用英语:

Wood is on scaffolding

There are certain rules you need to obey when working on a scaffolding.

The fire spread from the boards onto a wooden scaffolding surrounding the bridge’s construction.

Those seats are on vast towers of scaffolding stretching over the wall

Fall arrest scaffolding: In the form of projecting scaffolding or a truss-out scaffold or in combination with façade scaffolding

... responsibilities in such a scaffolding that supports the swarm,...