... . Construction of High Mast : Inner double Drum, Rising & Lowering System5. Poles, Anchor Bolts, Nuts, Anchor Plate, Tem-plate: Hot dip Zinc ... , Nuts, Anchor Plate, Tem-plate rivets Hot dip Zinc galvanized13. Poles, Base Plate,Bolts to be finished smoothly before galvanizing.14 ... to contact us A.S.A.P. 30m high light poles in airport/highway/square, high lamp