Дешевое жилищное строительство

Detailed Description: A. The main structure( welding H steel) 1. Steel material: Q345, Q235. 2. Welding type: Auto- Submerged arc Welding and CO2 shielded welding. 3. Derusting Grade: Sa 2.5 grade in China. 4. Preservative treatment: two layer primer and two layer paint light gray (total thickness: 100-120um). B. The secondary structure( C purlin, steel bracing, tie- bar, knee- brace, support for steel beam and column, etc) 1.Steel material: Q235 2.Method of productionCutting, forming, drilling, CO2 welding, de- rusting, painting, etc 3. Derusting Grade: Sa 2.5 grade in China. 4. Preservative treatment: two layer primer and two layer epoxy paint light gray (total thickness: 100-120um). C. EPS sandwich panel for Roof. 1.Panel type: 970,950 2.Galvanized steel sheet: 60-70g/m2 3.Outside (corrugated steel sheet): 0.3, 0.4, 0.5,0.6mm 4.Inside (corrugated steel sheet): 0.3, 0.4, 0.5,0.6mm 5.Density of EPS: 8kg-12kg/m2 6.Color of steel sheet: sea blue, white grey and bright red.