01. Increase supporting strength;
02. Reduce maintenance cost;
03. Lightweight;
04. Fireproof, waterproof;
05. Zinc coating: 60 to 275g/m²;
06. Surface processing: small spangle/bright medium spangle/big spangle;
07. Surface chemical processing: chromate, dry, oiled and unoiled;
08. Thicknesses: 0.11 to 2mm;
09. Tolerance: ±0.03mm;
10. Width: 600 to 1,500mm;
11. Length: customized.