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T3 Steel Grating Stair Treads

T3 Steel Grating Stair Treads,Black Steel Grating Stair Treads,Steel Grating Stair Treads for transportationBlack Steel Grating Stair TreadsSteel Grating Stair Treads for transportationOur company produces completesteel ladderswith 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 belowSPECIFICATIONST1 Welded Fixingwithout Nosing

Type of Stair Treads

Checkered plate nosing

Structure Characteristics

T3

YES

For 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,T2,T3,T4Bearingbarat30mmpitch

95

125

155

185

215

245

275

T1,T2Bearingbars40mmpitch

125

165

205

245

285

T3,T4Bearingbars40mmpitch

115

155

195

235

275

Fixingholecenters

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, 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 70μm 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.



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