1, double the road street lamp for double single fire lights, motor vehicle lane 11.5 meters from the ground, 8.5 meters from the ground floor of the sidewalk, bilateral cross layout, spacing of 50 meters. Express road light source for Mitutoyo 120WLED street lamps, sidewalk street lamp light source for Mitutoyo 80WLED street lamp. On the road with 12m pole, double cantilever are singled out, 400W high pressure sodium lamp. 2, the lamp pole material with high-quality Q235A steel (the silicon content of the steel is not higher than 0.04%, reference brand Shanghai Baosteel, Masteel, Shougang Group and other) bending forming of the conical rod, a molding, pole by 4mm thick steel plate making, pole wall thickness does not include galvanized layer thickness. The main rod is a conical rod, the upper diameter is about 85mm, the diameter of the lower opening is about 200mm. Pick up the use of the diameter of 60mm steel pipe, the outer diameter of the motor vehicle lane 1.6 meters, the sidewalk is 1.2 meters, wall thickness 3mm. 3, the surface is smooth, without any cracks, leakage welding, a continuous porosity, undercut, inequality. Pole center line straightness error does not exceed rod length of 0.02%, the appearance of the rod body without uneven without a trace, the appearance of the lamp post without obvious defects. 4, the welding method for automatic TIG welding, ultrasonic testing, requirements of welding GBl1345 grade II standard. The nail pole is sheathed with screw fixation. 5, the lamp pole is made of hot galvanized anti-corrosion treatment, zinc layer not less than 75 microns, surface practical smoothness, basically the same color, hammer test after skin, no peeling, galvanized life not less than 20 years. The quality of outdoor pure polyester plastic powder, color to be agreed, smooth surface, plastic layer is stable in quality, do not fade, do not shed, strong adhesion, resistance to strong ultraviolet, life should not be less than 20 years, thickness is greater than or equal to 80um, in line with the standards of ASTMD339-83 6, a lamp post spray should be.