They are available with various types of corrosion-resistant finishes; usually hot-dip or mill galvanized. It serves as an open, elevated raceway that keeps cables off the floor, protecting them from damage. The main advantage of utilizing steel in cable tray fabrication is the high strength to low cost ratio, however, the disadvantages of using steel are the increased structural weight, poor. , ABB offers steel cable tray with pre-galvanized and hot-dip galvanize lvanization is an economical and effective way to protect steel ag tal, naturally oxidizes when exposed to air, but at a much slower rate than steel. This zinc coating provides moderate corrosion resistance, making galvanized steel cable trays ideal for installations in dry indoor or outdoor environments with. Dry indoor rooms should use pre-galvanized (PG) steel.