... 1) Bearing bar specification: 20 x 3 to 100 x 62).Bearing bar pitches maybe 12.5,15,25,30,34,40, ... can be plain, serratted and I bars.5).Material can be Q235(mild steel), stainless steel.6).Treatment of surface: untreated or ... grates,ventilation grates,driling stages, ladder steps,ditch grates,fences,framedgrates,trash rack grates ,paint backing chambers…… [Super Deal] plain untreated steel grating