... sturdy, durable, and maintenance-free, extensively suitable for mines, electric power, petrochemical industry, machinery, light industry, shipbuilding, railway, road, ... ; 2. two posts(pillar)VI. Specification: S means standard type; E means economical type. Please see Railing Specification Table ... BallOut diameter of pillarOut diameter of handrailOut diameter of cross barStandard Type (S)76(85)48.0(51. ...