... : widely used for Power plants, chemical plants, oil refineries, steel mills, paper mills, mechanic plants, cement plants, municipal engineering, ... 1,200 mm.3.Column spacing:mainly four kinds as 1000,1200,1500,2000mm.4.Steel tube's size:subject ... to the design drawings confirmed by both parties. steel ball-joint handrail & stanchions with base plate,steel balcony baluster ...