45ft 50ft 55ft 60ft Steel Utility Pole With Single Circuit Tension Pole Steel Transmission Pole Product Description ASCE/SEI 48 : Design of steel transmission pole structures BS EN ISO 1461 : Hot dip galvanized coatings on fabricate d iron and steel articles. Specification and test methods. ASTM A123 : Standard specification for zinc (hot galvanized) coating on Iron and Steel Products ASTM A 153/A153M : Standard specification for zinc (hot galvanized) coatings on iron and