1. serrated treads grating
We manufacture different styles of stair ladders that used in family,industry and construction.
Material: mill steel black and hot dip Galvanizing / and stainless grating
Usage: ladder, flooring walkway, platform ,steel structures, stair tread, well cover, trench cover, sump cover,compound gratings, storage shelves,fences and handrail so on for construction project, oil project, seaport, power plant, water plant, defense project, chemical factory and so on
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2 serrated treads grating type.
1)There are six kinds of steel grating stair T1,T2,T3,T4.T5,T6
T1 Welded fixing and Without nosing
T2 Bolted fixing and without nosing,easy to installation and dismantle
T3 Welded fixing and with checkered plate nosing, can be anti-skid.
T4 Bolted fxing and with checkered plate nosing, can be anti-skid ,easy be installation,
T5 Welded fixing and with striped plate nosing, can be anti-skid.
T6 Bolted fixing and with striped plate nosing, can be anti-skid.
2) Material: Mild Steel (Low Carbon Steel) or Stainless Steel
3) Surface Treatment:
Untreated, Painting ,Powder coated or Hot dip Galvanizing
4) Steel grating standards:
A) China: YB/T4001-1998
B) USA: ANSI/NAAMM (MBG531-88)
C) UK: BS4592-1987
D) Australia: AS1657-1988
E) Japan: JJS
3. serrated treads grating specification
| Pitch of Bearing bar |
Cross-bar Pitch |
Specification of bearing bar load(width×thickness) |
| 32×5 |
40×5 |
45×5 |
50×5 |
55×5 |
60×5 |
| 30 |
100 |
G325/30/100 |
G405/30/100 |
G455/30/100 |
G505/30/100 |
G555/30/100 |
G605/30/100 |
| 50 |
G325/30/50 |
G405/30/50 |
G455/30/50 |
G505/30/50 |
G555/30/50 |
G605/30/50 |
| 40 |
100 |
G325/40/100 |
G405/40/100 |
G455/40/100 |
G505/40/100 |
G555/40/100 |
G605/40/100 |
| 50 |
G325/40/50 |
G405/40/50 |
G455/40/50 |
G505/40/50 |
G555/40/50 |
G605/40/50 |
| 60 |
50 |
G325/60/50 |
G405/60/50 |
G455/60/50 |
G505/60/50 |
G555/60/50 |
G605/60/50 |
Max. Stair treads lengths
Steel grating specification
Bearing bar size |
25*3 |
25*5 |
32*5 |
| Bearing bar pitch30mm |
550 |
900 |
1300 |
| Bearing bar pitch 40mm |
450 |
750 |
1200 |
Recommend stair tread widths
T1,T2,T3,T4
Bearing bar pitch 30mm |
95 |
125 |
155 |
185 |
215 |
245 |
275 |
T1,T2,T3,T4
Bearing bar pitch 40mm |
|
125 |
165 |
|
205 |
245 |
285 |
| |
115 |
155 |
|
195 |
235 |
275 |
| Fixing hole centers |
45 |
75 |
100 |
150 |
Note:bearing bar thickness 5mm
4. serrated treads grating material
5..our company profile
Hebei Jiuwang Metal Wire Mesh Co.,Ltd.(original Anping County Jintai Metal Mesh Co.,Ltd.).Established in 1992,our company is a manufacturer of large steel structure and steel gratings,integrating development,production and distribution.The company register capital is 10,080,000 Yuan,and take an area of 34,680 square meters.In 2003,we have got the ISO9001:2000 certification by BQR.
6.Why choose our company
1.Own independent three press-welded steel grating machine and we have our own biggest galvanization product line in local market
2.profession design and drawing teams customize based on customers'requirement
3.ISO9001 Certificate
4.Located in Anping wire mesh base Hebei province,near from Beijing airport,Tianjin sea Port!
5.Now we adopted automatic bending machine, robot welding machine,the grating quality get more perfect and price more competitive!
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