Roof Top Tower 1. ISO and AWS Certificate2. 17 years of production experience3. Material: Q235B/A36,Website:http://www.transmission-towers.com, Q345B/A572 Gr 50, Q420B/A572 Gr 604. Hot DIP galvanization as ASTM A-1235. OEM is welcome6. High quality with reasonable price7. Can produce various height and structural tower8. Monthly production capacity can reach 10000 Metric tons 9. Life time : 20years 10. Warranty: 2 years 11. H.S Code: 73089000Performance StandardBesides conforms to the drawing and design, the materials and fabrication of tower components shall conform to the following standards (Chinese Standards) and customer's requirements.Steel pipe/angle/hybrid tower welding requirements1 ) CO2 welding and submerged arc auto welding inside and outside or other methods.2 )Welded seam shall be full penetration and grinded.3 )The welded product has no fissure, scar, overlap, layer or other defects. Terms Detail Height 6m,7m,9m,12m,15m Wind Pressure 0-300 KM/H Details & Shape Self-supported Angle Steel Towers, square 4 legged, tubular or lattice type or combined Material Q345B/A572, minimum yield strength >=345MPA; Q235B/A36, minimum yield strength>=235MPA Surface treatment Hot dip galvanized as  ASTM A- 123, color polyester power ,painting or any other standard by client required. Design We can design free of charge if Qty is numerous, client should supply the design parameters. Standards ISO 9001:2008 Welding CO2 welding, Submerged  arc  welding , internal and external double welding makes the welding seam beautiful in shapeWelding Standard :AWS ( American Welding Society ) D 1.1 Working & Resting Platform Quantity 1-3 PCS Antenna Support 3-18 PCS Microwave Dish 3-18 PCS Spare parts or accessories All Necessary parts, e.g. Steel Tower with platform,climbing ladder with safety cage,cable ladder,HD bolts and foundation template, bolts and nuts, antenna brackets, Paint kits, Lightning & earthing System, Fall arrest system, Navigation light, Generators, Security room, Canopy, Shelter and Palisade Fencing