spiral steel stair treads grating
1. spiral steel stair 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.
2. spiral steel stair 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
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Pitch of Bearing bar |
Cross-bar Pitch |
Specification of bearing bar load(width×thickness) |
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32×5 |
40×5 |
45×5 |
50×5 |
55×5 |
60×5 |
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30 |
100 |
G325/30/100 |
G405/30/100 |
G455/30/100 |
G505/30/100 |
G555/30/100 |
G605/30/100 |
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50 |
G325/30/50 |
G405/30/50 |
G455/30/50 |
G505/30/50 |
G555/30/50 |
G605/30/50 |
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40 |
100 |
G325/40/100 |
G405/40/100 |
G455/40/100 |
G505/40/100 |
G555/40/100 |
G605/40/100 |
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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
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Steel grating specification Bearing bar size |
25*3 |
25*5 |
32*5 |
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Bearing bar pitch30mm |
550 |
900 |
1300 |
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Bearing bar pitch 40mm |
450 |
750 |
1200 |
Recommend stair tread widths
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T1,T2,T3,T4 Bearing bar pitch 30mm |
95 |
125 |
155 |
185 |
215 |
245 |
275 |
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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 |
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Note:bearing bar thickness 5mm
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Product Details |
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No. |
Terms |
Description |
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1 |
Material |
Low carbon,middle carbon,stainless steel |
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2. |
Material standard |
GB700-88,ASTM(A36),BS4360(43A),AS3679 |
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3. |
Bearing bar size |
20*3,20*5,25*3,25*5,32*3,32*5,35*3,35*5, 40*3,40*5,45*5,50*3,50*5,55*5,60*5,65*5mm etc, |
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4. |
Bearing bar pitch |
15,20,25,30,33,35,38,40,50,60,80,90mm |
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5. |
Cross bar pitch |
24-200mm |
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6. |
Surface treatment |
Hot dipped galvanized,painted,self-color, |
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7. |
Grating standard |
YB/T4001.1-2007,ANSI/NAAMM(MBG531-88), BS4592-1987,AS1657-1985 |
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8. |
Bearing bar type |
F,I ,S,IS type |
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9. |
Application |
Floor walkway,industrial platform,stair tread,metal ceiling,trench cover,barrier fencing |
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10. |
Feature |
Fine appearance,anti-corrosive,simple installation,light weight,high load,anti-skid, prevent dirt deposition,ventilation,anti-explosion |
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11. |
Payment terms |
TT,L/C |
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12. |
Package |
Pallets in containers packed by steel strap and worthy sea shipping, or according to the customers' requirements |
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13. |
Product capacity |
10days for a 20” |
4. spiral steel stair grating material
checkered nosing strip nosing
serrated bearing bar
cross bar
side plate
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