Steel Bar Grating Manufacturer

Hot-dip galvanized steel grating, also known as bar grating, is made by arranging load-bearing flat steels and cross bars at specific intervals, welding them into raw panels using high-voltage resistance welding machines, and then processing them into finished products through processes such as cutting, notching, hole punching, and hemming. The welded steel grating is immersed in molten zinc, and a dense zinc layer is formed on its surface through a zinc-iron alloy reaction. This process significantly enhances the corrosion resistance of the steel grating and extends its service life.

Steel Production Process

Pressed welded steel grating. The cross bar is pressed into the bearing bar by an automatic resistance welding machine.

Penetration welding grating. Pre-drill holes in the bearing bars, usually in the middle. Insert the cross bar, usually a round bar. Weld it into shape.

Press locked steel grating. The pressed locked steel grating is made of bearing bars through processes such as grooving (holes), plug-in cross flat or serrated bars pressing, welding, and finishing.

Swage locked grating. The cross bar is pre-threaded and then clamped into shape using special equipment. Usually used in the production of aluminum gratings.

Riveted steel grating. The connecting bar(cross bar) is bent and fixed with rivets in a direction parallel to the bearing bar.

Steel Grating Material & Manufacture Standard

Standard	Manufacture Standard	Steel Material Standard
Standard	Manufacture Standard	Bearing Bar	Cross Bar	Stainless Steel
China	YB/T 4001.1-2019	GB/T 700 Q235 Q235B	GB/T 700 Q235	ASTM A240 GR304(L) or GR316(L)
USA	ANSI/NAAMM(MBG531-00)	ASTM A1011 CS Type B or ASTM A36	ASTM A510	ASTM A240 GR304(L) or GR316(L)
British	BS4592	BS EN 10025	BS EN 10025	BS EN 10258
Germany	DIN24537-1	DIN EN 10025	DIN EN 10025	DIN EN 10088
Australia	AS1657	BS EN 10025	BS EN 10025	BS EN 10258

Conventional Grating Specifications

Bear Bar(mm)	Cross Bar(mm)			Bearing Bar Spacing(mm)			Cross Bar Spacing(mm)			Width(mm)	Length(mm)
20×3	5×5	6×6	8×8	30	34	40	38	50	100	993	6000	others
20×5	5×5	6×6	8×8	30	34	40	38	50	100	995	6000	others
25×3	5×5	6×6	8×8	30	34	40	38	50	100	993	6000	others
25×5	5×5	6×6	8×8	30	34	40	38	50	100	995	6000	others
30×3	5×5	6×6	8×8	30	34	40	38	50	100	993	6000	others
30×5	5×5	6×6	8×8	30	34	40	38	50	100	995	6000	others
32×3	5×5	6×6	8×8	30	34	40	38	50	100	993	6000	others
32×5	5×5	6×6	8×8	30	34	40	38	50	100	995	6000	others
40×3	5×5	6×6	8×8	30	34	40	38	50	100	993	6000	others
40×5	5×5	6×6	8×8	30	34	40	38	50	100	995	6000	others
50×3	5×5	6×6	8×8	30	34	40	38	50	100	993	6000	others
50×5	5×5	6×6	8×8	30	34	40	38	50	100	995	6000	others
* The table is of regular specifications. If other models are required, we will customize them for customers.

Hot Dip Galvanization Standard

Galvanized Standard	China	USA
Galvanized Standard	GB/T 13912	ASTM A123/A 123M
Material Thickness	3≤t≤6	1.6≤t≤3.2	3.2≤t≤4.8	4.8≤t≤6.4
Minimum Average Thickness (μm)	70	65	75	75
Conversion	mils=μmx0.03937 oz/ft²=μmx0.02316 g/m²=μmx7.067
*The thickness of the galvanized layer can be customized according to customer needs

Advantages of Steel Bar Grating

High strength and light structure
Good anti-corrosion performance
Beautiful appearance
Self-cleaning and easy maintenance
Good ventilation, lighting, and heat dissipation performance
Anti-slip and explosion-proof
Easy to install and disassemble

Steel Bar Grating Application

Offshore and ship platform
Industrial flooring
Stairs
Steel mills
Warehouses
Power Plant
Trenches
Treatment plants
Airport
Walkway
Maintenance platform
Bridge deck
Chemical plant

Steel Grating Material & Manufacture Standard