... structure is a quaternary AI-Fe-Si-Zn compound which becomes a protection layer on the steel ... BUILDING & CONSTRUCTION Floor decks, ceilings, verandas, rolling doors, warehouse, partitions, sheds, gutters, wall, underground piping, sashes, ... NameHot-Dip 55% AI-Zn Alloy-Coated Steel CoilsStandardSize Available SkinpassWithout SkinpassSpecificationOrder Width (mm)Base ... 4≤t<0.60.6≤t<1.01.0≤t<1.61.6≤t<2 ...