Aluminium Cable Trays: While durable, aluminium lacks the same strength as steel and is prone to deformation under heavy loads. Lightweight and High Strength Table: Weight Comparison of Cable Tray Materials Lightweight trays reduce labor costs, ease installation, and minimize additional structural reinforcement. Superior Corrosion Resistance. Strong Corrosion Resistance: Galvanized cable trays are coated with a layer of zinc, which effectively protects the tray from corrosion. This makes them ideal for environments with moderate humidity or industrial settings where exposure to moisture is a concern. This can lead to easier installation and reduced labor costs.