T2 Steel Grating Stair Treads,food Steel Grating Stair Treads,ISO Steel Grating Stair Treads food Steel Grating Stair Treads ISO Steel Grating Stair Treads Our co***ny produces complete steel ladders with hand railings which are made of grating treads. According to whether the nosing to be used and the methods of mounting to stringers, grating treads are classified into four types, expressed as T1,T2,T3 and T4. In view of economics it is advisable to use the recommended lengths and widths below Type of Stair Treads Checkered plate nosing Structure Characteristics T2 NO For anchoring with bolts, the two ends are closed with 65 x5 mm flat bars with holes. Without checkered plate nosing. T1 Welded Fixing without Nosing Recommended Stair Treads Width T1,&©|160;T2,&©|160;T3,T4&©|160;Bearing&©|160;bar&©|160;at&©|160;30mm&©|160;pitch 95 125 155 185 215 245 275 T1,&©|160;T2&©|160;Bearing&©|160;bars&©|160;40mm&©|160;pitch 125 165 205 245 285 T3,T4&©|160;Bearing&©|160;bars&©|160;40mm&©|160;pitch 115 155 195 235 275 Fixing&©|160;hole&©|160;centers 45 75 100 150 Grating Size Grade CN: Q235, Q345, USA: A36, UK: 43A Standard CN: YB/T4001-1998, USA: ANSI/NAAMM, UK: BS4592-1987, AUS1657-1988, JJS Certification CE, GOST, ISO9001, ISO14001, HSE Bearing bar type Plain, Serrated (tooth-like), I bar (I section), Serrated-I Bearing bar size 20X5, 25X3, 25X4, 25X5, 30X3, 30X4, 30X5, 32X3, 32X5, 40X5, 50X4.75X8,100X8mm,etc Bearing bar pitch 20,25,30,32.5,34.3,40,50,60,62,65mm Cross bar size 5X5, 6X6, 8X8mm (twisted bar)/5, 6, 8mm ( round bar) Cross bar pitch 0, 50, 60, 65, 76, 100, 101.6, 120, 130mm, etc. Panel size 3x20ft,3x24ft,3x30ft,5800x1000,6096x1000,6400x1000, as request Surface treatment Untreated, hot dip galvanized, cold dip galvanized, painted, powder coated,pickling, electrolytic polishing, or as customers' requirement. Galvanization Standard CN: GB/T13912, USA: ASTM (A123), UK: BS729 Color Silver/Black Application petroleum and chemical, port, power, transportation, papermaking, medicie, steel and iron, food, munici |