Galvanized on both sides to prevent corrosion from weather exposure
Manufacturing Process
Steel Preparation
Steel arrives in large rolls
Decoiler: Unwinds and flattens the steel sheet
Shear: Cuts steel to the correct length
Marking and Cutting
Plasma Cutter: Marks bending lines at both ends of the sheet
Sheets cut into rectangular or trapezoid shapes based on pole design
Bending
Press Break: Bends the sheet into a multisided round pole
Digital Measuring Device: Ensures accuracy of the first bend
Welding
Hydraulic Rollers: Apply pressure to join edges
Welding Head: Fuses seam with molten steel
Deposits flux to avoid air penetration into the weld
Hydraulic Press: Prevents warping during cooling
Connection Plate & Base Plate
Plasma machine cuts and drills connection plate
Connection and support plates welded in place
Base plate welded to the pole's bottom, includes anchor bolt holes
Welds inspected using testing device with electric current and colored powder
Galvanizing Process
Poles shipped to a galvanizing plant
Submerged in wash tanks to treat inner and outer surfaces
Sulfuric Acid Bath: Removes stubborn contaminants
Chemical Bath: Prepares surface for metallurgical bond
Molten Zinc Bath: Galvanizes poles at 842 degrees
Surface skimmed to keep clean from iron oxide and ash
Final Product
Poles are galvanized, ensuring long-term durability
Capable of supporting traffic infrastructure for 40+ years
Summary
The detailed and precise production process ensures traffic signal poles are strong, durable, and resistant to weather-induced corrosion, providing long-term support for essential road infrastructure.