T4 Steel Grating Stair Treads manufacturer from China Yantai Haorui Metalwork Co.,Ltd.

Place of Origin:

Shandong, China (Mainland)


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T4 Steel Grating Stair Treads

T4 Steel Grating Stair Treads,customized Steel Grating Stair Treads,customized Steel Grating Stair Treads Supplier

customized Steel Grating Stair Treads

customized Steel Grating Stair Treads Supplier

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

T1 Welded Fixing without Nosing

Type of Stair Treads	Checkered plate nosing	Structure Characteristics
T4	YES	For anchoring with bolts, the two ends are closed with 65 x 5 mm flat bars with holes with checkered plate nosing

Recommended Stair Treads Width

T1, T2, T3,T4 Bearing bar at 30mm pitch	95	125	155	185	215	245	275
T1, T2 Bearing bars 40mm pitch	125		165	205		245	285
T3, T4 Bearing bars 40mm pitch	115		155	195		235	275
Fixing hole 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, 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.