The feed material is manufactured out of High tensile Base Metal with min 550 Mpa Yield strength, metallic hot dip coated with Al-Zn alloy (55% Aluminium, 43.5% Zinc, 1.5% Si ) as per AS 1397 / IS15961 – Zincalume AZ150 (Min. 150 gms/sq.mt total on both sides) with Super Durable Polyester colorbond steel XRW quality paint system of apporved color suitable for exterior application conforming to AS 1397: 2001/ IS15961 for metallic coating & AS/NZS 2728: 2007 type-4 / IS15965 for pre-painted Al-Zn alloy coated steel Tata BlueScope Steel make. The sheet colour shall have a total coating thickness of 35 microns, Super durable polyester Colorbond XRW quality paint system as per AS/NZS-2728: 2007/ IS15965  (Type 4), comprising of 20 microns exterior Super Durable Polyester coat on top surface and 5 micron reverse polyester coat on back surface over 5 micron primer coat on both surfaces. The paint system shall have inorganic pigments for color durability. The steel sheet shall have brand marking (product details, date , mfg name, etc) on back side at regular interaval confirming genuinity of the material.