Welcome to Hebei Jiuwang Metal Wire Mesh Co, . Ltd., where we manufacture strong, safe, no-maintenance steel grating and accessories for a wide range of industrial uses. (The factory is ISO 9001: 2000 accredited. )
With more than 20 years experience, we are specilized in forging steel grating and surface treatment(hot-DIP galvanized, painting ). Our sales team, working cooperatively with our technical team, so it is able to make quotes for your projects free of charge and professionally.
Raw material: Carbon steel, mild steel, stainless steel and so on
Type: Plain bearing bar(F), Ibearing bar(I), Serrated bearing bar(S), Serrated andIbearing bar(IS)
Surface treatment: Hot-DIP Galvanizing, electrolytic zinc plating, Lacquering, Untreated
Size: Beside the usual size we also product according to customers' request
Brand: JIUWANG
Certification: ISO9001: 2000
Steel Grating Standards:
A) China: YB/T4001-1998
B) USA: ANSI/NAAMM (MBG531-88), AISI, ASTM
C) UK: BS4592-1987
D) Germany: DIN
E) Australia: AS1657-1988
F) Japan: JIS
Steel Product Standard:
China GB/T 700-1988
Hot Galvanizing Standard
China GB/T 13912-2002
Our company produces steel ladders with guardrail, which are made of grating treads. When specifying the steel ladders, pls refer to the national standard construction drawing 87J432. According to whether the nosings are to be used and the methods of mounting to stringers, stair treads are classified into four types: T1, T2, T3, T4. We suggest that the dimensions are as follow:
| Item |
Recommended maximum stair treads length (mm) |
| Bearing bar dimension mm |
25*3 |
25*5 |
32*5 |
| Bearing bar's pitch at 30 mm |
550 |
900 |
1300 |
| Bearing bar's pitch at 40 mm |
450 |
750 |
1200 |
| Item |
Recommended stair treads width (mm) |
T1/T2/T3/T4
Bearing bar pitch at 30mm |
95 |
125 |
155 |
185 |
215 |
245 |
275 |
T1/T2
Bearing bar pitch at 40mm
T3/T4 |
|
125 |
165 |
|
205 |
245 |
285 |
| |
115 |
155 |
|
195 |
235 |
275 |
| Fixing hole center(mm) |
45 |
75 |
100 |
150 |
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