According to the 2013 standard, the maximum thickness of steel cable tray plate is 2. 〉 Available in standard height from 40mm up to 110mm. 〉 Fire Resistance Certification (E30-E60-E90) according to DIN 4102-12 is available. 〉 Due to special, infinite pattern design, greater. SS304, and SS316. Aluzinc Steel Sh Perforated cable tray offer high strength as per specification which made them perfect for heavy-duty power distribution in industries, manufactured using pre-galvanized mild steel. Covers for Perforated Cable Trays shall be Pre galvanised, Powder Coated (Stainless Steel and Aluminium also available on Request). 5mm clearance holes for cable fixing.