The Six Key Features of Color-Steel Plates: 1. Lightweight: 10-14 kg/square meter, equivalent to 1/30 of brick walls. 2. Insulation and Heat Preservation: Core thermal conductivity: λ ≤ 0.041 W/mK. 3. High Strength: Suitable for ceiling and protective structure boards, capable of bearing loads and resisting bending and compression; generally, beams and columns are not needed in buildings. 4. Vibrant Color: No surface decoration required; the anti-corrosion layer of color galvanized steel plate lasts for 10-15 years. 5. Flexible and Quick Installation: Construction period can be shortened by over 40%. 6. Oxygen Index (OI): 32.0 (as tested by the provincial fire product quality inspection station). Color-steel plate types: Before shaping, it is in a coil form, and after shaping, there are many models, commonly including: 820 type, 840 type, 900 type! Its composition structure includes: protective film, polyester paint, galvanized layer, and steel plate.