Corrugated Steel Plate 3

https://mygalvanizedsteelculverthaven.halcyonledger.com/posts/why-galvanized-steel-culvert-remains-a-top-choice-for-drainage-infrastructure

Corrugated steel plate is that familiar, wavy metal sheeting you see on warehouse roofs and rural sheds. Its ridges give it surprising strength for its weight, making it great for quick, sturdy walls and covers. The pattern channels rainwater off, and the galvanized finish fights rust, so it just weathers nicely over time. It's honest, practical stuff.