T3 Steel Grating Stair Treads

We are offering the T3 Steel Grating Stair Treads from fine grade materials. 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,T3andT4. In view of economics it is advisable to use the recommended lengths and widths below

SPECIFICATIONS:
T1 Welded Fixing without Nosing
Type of Stair Treads Checkered plate nosingStructure Characteristics
T3YESFor installation by welding, the two ends are closed with flat bars which are the same the bearing bars in length With checkered plate nosing.
Recommended Stair Treads Width
T1,A T2,A T3,T4A BearingA barA atA 30mmA pitch95125155185215245275
T1,A T2A BearingA barsA 40mmA pitch125165205245285
T3,T4A BearingA barsA 40mmA pitch115155195235275
FixingA holeA centers4575100150

Grating Size:
Grade CN: Q235, Q345, USA: A36, UK: 43A
StandardCN: YB/T4001-1998, USA: ANSI/ NAAMM, UK: BS4592-1987, AUS1657-1988, JJS
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 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
Color : Silver/Black
Application : petroleum and chemical, port, power, transportation, paper making, medicine, steel and iron, food, municipality, real estate, manufacturing

SURFACE TREATMENT
Three ways of surface treatment can be adopted: galvanizing, painting and untreated, of which hot- dip galvanizing is recommended.
Hot-dip galvanizing : It 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 70I m when steel bards range from 3mm to 5mm in thickness.
Painting : It is also a good way to get surface protective film. Coating thickness depends on the customer's choice.