catwalk bar grating(stairs bar grating)
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ISO9001
catwalk bar grating(stairs bar grating)
Packaging Detail: | seaworthy,by pallet or others as required. |
Material: Mild Steel (Low Carbon Steel) , Aluminum, Galvanized, Aluminum, Stainless Steel
Type: Plain Style Steel Grating, Serrated Style Steel Grating and I Bar Type Steel Grating
Application: flooring walkway, platform and steel structures, stair tread, well cover, trench cover, compound gratings, storage shelves, ladder, fences and handrail so on for construction project, oil project, seaport, power plant, water plant, defense project, chemical factory and so on.
Steel grating standards:
A) China: YB/T4001-1998
B) USA: ANSI/NAAMM (MBG531-88)
C) UK: BS4592-1987
D) Australia: AS1657-1985
E) Japan: JJS.
Specification List:
Type | W-- welded steel grating L-- pressure-locked C-- socket-welding | |||||||
Bearing bar centers | 15-30, 40, 60, 80, 90 mm etc. with 30, 40 mm recommended. | |||||||
Cross bar centers | any greater than 30mm is ok. with 50, 100mm recommended. | |||||||
Surface treatment | G-hot-dip galvanization(G is usually omitted) P-painting U- untreated | |||||||
Bearing bar shape | F- plain surface (F is usually can be omitted) S-serrated surface I-the section is of ‘I’ type | |||||||
Bearing bar pitch (mm) | Cross bar Pitch (mm) | Specification of bearing bar load width× thickness (mm) | ||||||
20×3 | 25×3 | 32×3 | 40×3 | 20×5 | 25×5 | |||
30 | 100 | G203/30/100 | G253/30/100 | G323/30/100 | G403/30/100 | G205/30/100 | G255/30/100 | |
50 | G203/30/50 | G253/30/50 | G323/30/50 | G403/30/50 | G205/30/50 | G255/30/50 | ||
40 | 100 | G203/40/100 | G253/40/100 | G323/40/100 | G403/40/100 | G205/40/100 | G255/40/100 | |
50 | G203/40/50 | G253/40/50 | G323/40/50 | G403/40/50 | G205/40/50 | G255/40/50 | ||
60 | 50 |
| G253/60/50 | G253/60/50 | G403/60/50 | G205/60/50 | G255/60/50 | |
Bearing bar centers at 20mm:
This kind of fine mesh steel gratings have strong load ability and also can prevent the access of sundries of 18mm in diameter. This kind of gratings fit for pedestrian deck, walkway and ditch covers which require high security.
Notes: common welding standard: single-side full welding every 6 bearing bars.
Bearing bar centers at 30mm:
Standard: American, Australian, Japan standards are available.
Feature:This grating is featured well by heavy-duty,well resistance of strong impact on surface
Usage:This kind of steel grating is the most commonly used in projects
Gratings with cross bar centers at 50mm can bear lateral impact well. This kind of steel grating fit for all kind of industrial platforms.
Notes: common welding standard: single-side full welding every 5 bearing bars.
Bearing bar centers at 40mm:
Characteristics : light grating and very economical.
Usage: The products most commonly used for Belt corridor, storage shelf,Attic panel, trestle, guardrail, sunshade gate, etc.
Standard: British, German,French and Japanese standards are available.
Notes: common welding standard: single-side full welding every 4 bearing bars.
