Corrugated Steel Plate (CSP) 5

https://steelculvertreview.brightsora.com/posts/choosing-the-right-steel-culvert-for-your-infrastructure-project

You’ve probably seen corrugated steel plate on culverts or barn roofs—those wavy metal sheets that look like they’re built to take a beating. The ridges aren’t just for looks; they add serious strength without a lot of weight, so the material can span gaps and handle loads that flat steel would buckle under. It’s not glamorous, but it’s one of those workhorse materials that quietly holds up roads, bridges, and drainage systems everywhere.