Corrugated Steel Plate 5
https://wiki-fusion.win/index.php/Why_Corrugated_Steel_Plate_(CSP)_Remains_a_Backbone_of_Modern_Drainage_and_Infrastructure
A corrugated steel plate is that familiar wavy metal you see on barn roofs and industrial sheds. Its rippled shape gives it surprising strength, letting it span long distances without bending. Rain slides right off it, making it perfect for tough outdoor structures where you need something durable and low-maintenance.