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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