Chongqing Dawnrays double bunk bed welded part of the high standard welding welding, smooth surface; 1 double bed frame by automatic degreasing, electrostatic spray, after a rigorous nine-bit processing. Pure water cleaning, heating oil phosphate, table transfer, the drying process, the product antirust stronger, longer life. Incase pure color, soft, feel extraordinary. 2. Using automatic spraying line, surface electrostatic powder spray (manual and automatic spraying line combined coating uniformity, strong adhesion ability), the use of environment-friendly counter international brand is ROHS compliant Akzo powder, electrostatic spray plastic, making real environmental non-toxic products. 3. The bed frame and mattress rigorous force switch test, in line with the national standard. 4. bed back tube: 40mm * 40mm * 1.5mm square tube welded steel pipe. 5. Security fence: 1400mm * 250mm, Φ19 * 1.5mm pipe, fence left riser fixed directly to enhance the strength of the periphery. 6. Shop frame uses 30mm * 50mm * 1.5mm square tube welded steel pipe. 7. escalators: The pipe Φ25mm * 1.5mm, Φ19mm * 1.5mm tube, specification 260mm * 1250mm, total fourth gear, with a wear-resistant plastic cover, with glue fixed 8. Tiechuang planking: fir 1900mm * 70mm * 18mm * 12 roots, bottom-speed 900mm * 40mm * 30mm * 7 root beds punching board should be able to test (for punching weight 25kg, the impact of high 140mm, 10 times, no loose deformation) 9. Iron fasteners should Use spring washers, steel section carbon dioxide shielded welding, surface electrostatic powder spray, color gray, 70% more than the finish, hardness of 0.4, punching power 4N / M. Buy a bunk bed, we chose Chongqing Dawnrays! ! !