... 2.quick construction 3.reliable bearing 4.beautiful apperance Z steel purlin 1.Thickness:0.5mm to 3. ... buildings, large-span bridges, gymnasiums and portable houses. Z steel purlin may be used in single spans and ... from high tensile galvanized steel.2) Despotic C&Z section steel, Z section steel is roll-formed from galvanized steel, ... of products, please contact us for more information Z-shape Purline