Sign post tube is a specialized steel tubing designed to support road signs, traffic signals, and billboards.
Key Feature: High torsional strength to resist wind twisting.
Safety: Modern sign posts often feature "breakaway" technology. If a car hits the post, it snaps cleanly at the base to minimize injury to the driver, rather than acting like a solid wall.
Coating: Typically in-line galvanized or hot-dip galvanized to prevent rust from road salt and rain.