self supporting towers

1. key Details:Place of Origin: Shandong, China (Mainland)  Brand Name: Altai Tower or OEM Model Number: AT-G20 Surface treatment: Hot Dip Galvanizied or painted.   2.Packaging & Delivery: Packaging Details: Telecom tower will be bundled by Galvanized strapping as per client's requirements. Deliver: Shipped in 30 days after payment from Qingdao / designated port. Tower members: One steel tower is separated into several bundles. Bolts: Packing material is robust nylon bag or steel drum.   3. Technical Data   1. Design Code ALT/294/ASC-AC Structure Steel 2. Grade High Tensil Steel GB/T1591:Q345B, Q345C,Q3455D ASTM A572 Gr50 EN10025: S355JR, S355J0,S355J2 3. Design Wind Speed Max. 250 km/h 4. Allowable deflection 0.5 ~1.0 degree at operational speed 5. Tension strength (Mpa) 470~630 6. Yield strength (t≤16mm) (Mpa) 235 7. Elongation (%) 24 8. Impact strength KV (J) 27(20°C)---Q345B(S355JR) 27(0°C)---Q345C(S355J0) 27(-20°C)---Q345D(S355J2) Bolts & Nuts 9. Grade Grade 4.8, 6.8, 8.8 10. Standards for mechanical properties 10.1 Bolts ISO 898-1 10.2 Nuts ISO 898-2 10.3 Washers ISO 6507-1 11. Standards for Dimensions 11.1 Bolts DIN7990, DIN931, DIN933 11.2 Nuts ISO4032, ISO4034 11.3 Washers DIN7989, DIN127B, ISO7091 Welding 12. Method CO2 Shielded Arc Welding & Submerged Arc Welding(SAW) 13. Standard AWS D1.1 Marking 14. Method of marking of the members Hydraulic Press Stamping or Laser Engraving Galvanizing 15. Galvanization standard of steel sections ISO 1461 or ASTM A123 16. Galvanization standard of bolts and nuts ISO 1461 or ASTM A153 Test 17. Factory test Tensile test,Elements analysis, Sharpy test(impact test), Cold Bending,  Preece test,Hammer test Capacity 18. Maximum Production Capacity  2,000 Metric Ton per Month Packaging Detail:  With standard sea-worthy packaging or as per requirements.       Hot-dip Galvanization:  The galvanizing workshop we have invested in is equipped with equipment imported from Italy and is galvanized in strict accordance with the American ASTM A123 standard. 1 1   Why Choose Us?  1. Strict quality control system and abundant technical reserves have created world-class products.2. The factory has completed tens of thousands of project cases so far, so that we have a wealth of technical reserves.3. Facilitating supports and low labor cost make the product price have great advantages in the world.4. With a number of patented technologies and a mature drawing and drawing team, you can rest assured of your choice.5. China Power Grid Certification Level 1 supplier, you can safely choose and cooperate.6. We are not only manufacturers and suppliers, but also your partners and technical support.   Full Experience in the Industry       Mature Production Line 1      1  Sophisticated Equipments   Professional Design & Engineering Team