... Stair tread Welded or bolted fixing with checkered plate nosing or nonslip plate nosing 3.Guardrail Application:boiler factory,electric ... disposal,waterworks,electric power plant,petrochemical plant and others. 5.Suspended ceiling Application:tobacco manufacture,industrial factory building,large- ... to customers' requirementsFor example:1) Bearing bar pitches may be 12.5,15 to 30, 40, 60, 80 and 90mm, ...