Breakaway square sign pole base Steel material Astm a570, grade 50 structural quality Yield strength 60, 000 psi (410 mpa) Max tensile strength 79, 000 psi (540 mpa) Finish Zinc primer, hot-dip galvanized, astm a653 g90 Sizes 1 1/2", 1 3/4", 2", 2 1/4" and 2 1/2" square. Thickness Available in 12 and 14 gauge Holes Holes of 7/16" diameter are 1" on center on all four sides Others Powder coated posts are available in many colors
