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  • T1 Steel Grating Stair Treads
  • T1 Steel Grating Stair Treads
  • T1 Steel Grating Stair Treads
  • T1 Steel Grating Stair Treads
  • T1 Steel Grating Stair Treads

T1 Steel Grating Stair Treads

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T1 Steel Grating stair treads

Our company 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

T1 Welded Fixing without Nosing

Type of Stair TreadsCheckered plate nosingStructure Characteristics
T1NOFor installation by welding, the two ends are closed with flat bars which are the same with the bearing bars in length. Without checkered plate nosing.


Recommended Stair Treads Width


T1, T2, T3,T4 Bearing bar at 30mm pitch95125155185215245275
T1, T2 Bearing bars 40mm pitch125165205245285
T3,T4 Bearing bars 40mm pitch115155195235275
Fixing hole centers4575100150


Grating Size

GradeCN: Q235, Q345, USA: A36, UK: 43A
StandardCN: YB/T4001-1998, USA: ANSI/NAAMM, UK: BS4592-1987, AUS1657-1988, JJS
CertificationCE, GOST, ISO9001, ISO14001, HSE
Bearing bar typePlain, Serrated (tooth-like), I bar (I section), Serrated-I
Bearing bar size20X5, 25X3, 25X4, 25X5, 30X3, 30X4, 30X5, 32X3, 32X5, 40X5, 50X4.75X8,100X8mm,etc
Bearing bar pitch20,25,30,32.5,34.3,40,50,60,62,65mm
Cross bar size5X5, 6X6, 8X8mm (twisted bar)/5, 6, 8mm ( round bar)
Cross bar pitch0, 50, 60, 65, 76, 100, 101.6, 120, 130mm, etc.
Panel size3x20ft,3x24ft,3x30ft,5800x1000,6096x1000,6400x1000, as request
Surface treatmentUntreated, hot dip galvanized, cold dip galvanized, painted, powder coated,pickling, electrolytic polishing, or as customers' requirement.
Galvanization StandardCN: GB/T13912, USA: ASTM (A123), UK: BS729
ColorSilver/Black
Applicationpetroleum and chemical, port, power, transportation, papermaking, medicie, steel and iron, food, municipality, real estate, manufacturing
Three ways of surface treatment can be adopted: galvanizing, painting and untreated, of which hot- dip galvanizing is recommended.
Hot-dip galvanizingIt is a form of galvanization. It is a process of coating steel grating with a thin zinc layer. By passing the metal through a molten bath of zinc, the average coating thickness is 70μm when steel bards range from 3mm to 5mm in thickness.
PaintingIt is also a good way to get surface protective film. Coating thickness depends on the customer's choice.

Structure

T1 Steel Grating stair treads