Specifications of high mast lighting : 1) Material: hot dip galvanized steel. 2) Type: taper round or octagonal pole. High mast lighting : HeightFrom 20 m to 50 mSuit forAirport ,seaport,plaza,stadium ,square,highway,street way etcShapeConoid ,Multi-pyramidal,Columniform,polygonal or conicalMaterialUsually Q345B/A572,minimum yield strength>=345n/mm2 Q235B/A36,minimum yield strength>=235n/mm2As ...