Our Heavy Duty steel bar grating (HD Grating for short) is designed to subject itself to heavy rolling and static loads such as highways, plant floors, loading docks, inlet covers, and airports, and therefore its bearing bars are thicker and much deeper than our Standard Duty steel bar grating (SD Grating for short), allowing HD Grating to handle heavier loads.
Our HD Grating is manufactured by an electro-forging process, in which connecting cross members (cold twisted square steel bars or round rods) are resistance welded at a right angle to mild carbon steel bars (bearing bars). During the process, the bearing bars and cross members are permanently forged together by heat and pressure into a single unit construction. Therefore, our HD Grating is also known as Heavy Duty press welded steel grating.
The electro-forging process provides a positive fused connection that makes our HD Grating very durable even under the most demanding conditions.
As a rule, our Heavy Duty steel bar gratings are made out of cold rolled Q235 steel shapes. However, there is an exception that both the serrated type of bearing bars and I-bar type of bearing bars are hot rolled Q235 steel shapes.

Technical parameters of our Heavy Duty steel bar grating (HD Grating for short) are shown in the table below:

Note:

1. The size of cross bars is usually 8mm x 8mm or what you exactly need.
2. For more information on safe load data, please feel free to contact us, and our engineers will be more than happy to share them with you.

GNEE STEEL ,Has dedicated in producing and exporting all types of steel gratings for more than 19 years,A Professional Steel Grating & Safety Grating Manufacturer for Projects Engineering.

Factory

Advanced Equipment

We have more than 30 production lines of welded steel gratings and press lock gratings. Advanced equipment, skilled workers contribute to low production loss, high production efficiency and low products costs.

Supervise Strict Testing

All steel gratings are supervised by strict QUALITY CONTROL System both in International standard and enterprise test flow. All products our customers received are qualified and best in performance and package.

Steel Gratings Types We Supply

GNEE Steel Grating Application

Steel grating are designed and manufactured for various industrial and civil constructions in city road, gardens, yard, airport, railway and industrial engineering.

• Hot dip galvanized steel grating is the best choice for steel platforms in airports. Grating with 30 × 3 mm thick load bearing bars with a pitch of 30 mm and traverse bars at 50 mm or 100 mm is the suitable one.
• Steel grating, with robust design and spanning abilities, is very strong and safe for the support of floors and elevated walkway. It can be used for ceiling, interior decoration, platform aisle, ventilation windows, (Wells), advertising plaque and other construction.
• Widely used in the petrochemical industry, power plants, waterworks, sewage treatment plants, municipal works, sanitation projects in areas such as platforms, corridors, bridge, ditch cover, covers, ladders, fences, rails, and so on.