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What are the differences between the protection coatings?

Coating on metal is described in accordance with Australian Standards and refers to the coating mass on both sides of the section in grams. Boxspan’s normal coating is Z275 which means 275grams of Zinc per square metre (half on each side). Boxspan extra coating is Z600. Standard SHS posts have coating of Z100 (50g/m2 per side) and MAXI-TUBE (from Orrcon Steel) posts have a coating of ZM275 (137.5g/m2 per side), which is equivalent to Hot dip galvanising 500.

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