Steel Grating Supplier

General Introduction To Steel Grating: All You Need To Know

General Introduction to Steel Gratings

Steel grating is an open steel product made of orthogonal combination of bearing flat steel and cross bars at a certain spacing and fixed by welding or pressure locking. According to different production methods, it is mainly divided into pressure welded steel grating and pressure locked steel grating; cross bars are generally made of twisted square steel, round steel or flat steel. Steel Grating panels are generally made of carbon steel with a hot-dip galvanized exterior to prevent oxidation. They can also be made of stainless steel.The surface of steel grating can be punched with teeth to increase the anti-slip performance. The steel gratings are widely used in gutter covers, steel deck panels, petrochemical decks, factory floors, platforms, railing infill panels and stair treads. Steel Grating panels offer safety, strength, durability and characteristics when installed in industrial or architectural applications.


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SUNJ Grating is the best place to go for all your metal grating needs. We have over 15 years of experience and our team will be happy help you with any welding, shearing or cutting project that comes up!

Standard Welded Steel Grating

Swage Locked Steel Grating

Press-locked Steel Grating

Why choose steel gratings from ?

Steel gratings are an important part of many industrial and commercial settings. If you’re looking for a supplier of high-quality steel gratings, you should consider Royce Gratings Limited. We offer a wide range of steel gratings, including galvanized, painted, and powder-coated varieties. In addition, we can customize our products to meet your specific requirements. Here are just a few reasons why you should choose us:


Types of Steel gratings

Welded Steel Grating

Our most economical and durable products, type “W” welded steel gratings are manufactured by forge welding rectangular bearing bars and drawn cross bars. This welding process provides a positive, fused connection resulting in years of service under the most demanding conditions.

Spacing 19-W-4 is our most popular product and is recommended for most industrial flooring applications. With nearly 80% open area, 19-W-4 allows for the easy passage of dirt, debris, snow, and liquids and is essentially self-cleaning.

ADA conforming spacings 11-W-4 and 7-W-4 are commonly used in public areas. When specifying 11-W-4 products for ADA applications, 3/16” thick bearing bars must be specified.

Swage-locked grating

Type "SL" Swage Locked Steel Grating

Type “SL” steel gratings are manufactured by inserting hollow tube cross bars into pre-punched holes in the bearing bars. The cross bars are then hydraulically compressed to form a positive mechanical connection. The cross bars are recessed below the top surface of the bearing bars providing a uniform and attractive architectural appearance.

Swage locking is a particularly efficient process for the production of ADA conforming gratings. Type 7-SL-4 with 3/16″ thick bearing bars provides a net 1/4″ clear opening between the bearing bars. This narrow opening is often preferred in public area applications where high heeled pedestrian traffic is likely and drainage is necessary. 

Press-locked Steel Grating

Press-locked steel grating is made by locking the cross bars into the notches of the bearing bars by a pressing process. This type of grating is used where a high level of slip resistance is not required, such as in drainage ditch covers.


The Process Flow & Duration Estimation for Steel Gratings

Step 1: Raw Material Preparation:(1-2 days)

Raw materials for steel gratings can be carbon steel, galvanized steel, or stainless steel. The most common choice is low-carbon mild steel because it is inexpensive and easy to weld. To maintain this process flow, all the materials must be cut to size and cleaned to remove any dirt, grease, or other contaminants. Not to mention, the raw material must go through quality control to be approved.

Design Consultation for steel gratings
Steel gratings raw material

Step 2:Edge Preparation:

The edge of preparation of steel grating mainly refers to trimming and rounding the advantages of steel gratings. This is to remove any sharp or jagged edges that could cause injury. Doing this, it also gives the grating a more finished look. In addition, the edge preparation also helps to prevent the grating from rusting.

Step 3:Steel Grating Machine:

Steel grating machine is the critical equipment in the process of steel grating. It mainly uses to weld the bearing bar and cross bar together to form a kind of steel grating. There are many steel grating machines; the most common are automatic welding machines, CNC machines, etc.

weled steel gratings
press-locking of steel gratings

Step 4:Marking:

Marking is also a part of the process flow of steel grating. Marking mainly indicates steel gratings’ size, type, and other relevant information. With the help of marking, people can easily identify the steel gratings. In addition, it also helps to prevent the steel gratings from being mixed up.

Step 5:Maintenance:

Giving proper maintenance to steel gratings is very important to keep them in good condition. The most familiar way to do this is by regularly cleaning and inspection. Because steel gratings are exposed to many elements, they can quickly get dirty or damaged. By regularly cleaning and inspection, you can prevent this from happening.

Galvanized steel grating in Singapore
Dimension check for steel gratings

Step 6:Inspecting And Packaging:

Inspecting and packaging is the last step in the process flow of steel grating. This is to make sure that the gratings meet the required standards and are free of any defects. Once they inspect, they are then packaged for shipment. Steel grating and other products, like trench drain grating, need to be inspected and packaged before they are shipped out.

Step 7:Packaging(1 days)

To ensure that the products are not damaged during transport, we use high-quality packing materials.the packing of steel gratings requires special care and attention. Be sure to wrap each grate in a layer of plastic film, place them in a box or crate, and fill the gaps between the grates with packing material such as styrofoam peanuts or bubble wrap. Seal the box or crate with tape and label it with the contents and the date. These packing tips will help to ensure that your steel grates are protected from rust and corrosion during storage or transportation.

the packing of steel gratings

The Advantage of Our Steel Gratings

Quality Certification of Steel Gratings

The application of Steel Gratings

SUNJ Grating architectural metal products have been widely applied. 70% of our gratings are exported worldwide, such as the United States, Britain, Spain, Netherlands, Australia, New Zealand, Japan, Singapore, Malaysia, Thailand, etc.
Our steel gratings can be found in many large-scale power stations, boiler factories, petroleum engineering projects, municipal construction projects and more.

FAQs for Steel Gratings

At SUNJ Grating Solutions, we pride ourselves on providing high-quality products that meet the strictest standards. We offer a variety of steel gratings that are manufactured to meet different specifications, including ANSI/NAAMM (MBG535), ASTM (A36), and more.

There are a few ways that steel quality can be controlled when making gratings. One way is to use a higher-quality steel in the manufacturing process. Additionally, the surface finish of the grating can be controlled by using different types of metal finishes, such as zinc plating or powder coating. Finally, it’s important to have a well-designed and executed manufacturing process in place to ensure that the gratings meet the required specifications.

There are many different types of surface treatments, such as painting, hot-dip galvanizing, electroplating, etc. The most common type of surface treatment is hot-dip galvanizing.

Steel gratings are used for a variety of purposes, including: Walkways and platforms,Safety barriers and fencing,Stairs,Window shutters,Ceiling panels.

There are three main types of steel gratings: welded, press locked, and swaged. Welded steel gratings are the most popular type due to their strength and durability. Press locked steel gratings are also very strong, but are typically used for projects where a smooth surface is required. Swaged steel gratings are less common, but are often used in projects where a very tight fit is required.

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SUNJ Grating is the best place to go if you need metal gratings! We have over 15 years of experience and our team will be happy to help with any steel gratings needs.

Stainless steel gratings manufacturer
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