distribution & transmission steel power poles Standard :familiar with American , Austrila,Europen standard . distribution & transmission steel power poles Specification: TypeStraight Pole ,Tensile Pole ,Turn PoleSuit forElectricity distributionShapeConoid ,Multi-pyramidal,Columniform,polygonal or conicalMaterialUsually Q345B/A572,minimum yield strength>=345n/mm2Q235B/A36,minimum yield strength>= ...