Galvanised corrugated steel culverts to AASHTO M36 / M218, supplied in round, arch and box configurations.
Corrugated steel culverts replace concrete box structures for drainage crossings, offering rapid installation and the ability to carry significant fill height through soil-structure interaction. They are supplied round, pipe-arch or box, with galvanised or polymer-coated protection.
The steel ring and the surrounding compacted backfill act together: the flexible steel wall deflects under load and mobilises passive soil resistance, so the structure carries fill and traffic loads far in excess of what the steel plate alone could resist.