Houston’s Largest Inventory of Bar Grating Products





Houston, TX-based Marco Specialty Steel is your one-stop headquarters for superior bar grating products, as well as complete customization services. We stock thousands of bar grating panels and are available 24/7 to serve your rush needs. Call us at (800) 200-3047 for more information and a bar grating quote. Or see our load charts here.

Welded Steel: see load table
Always-in-stock welded steel bar grating is the most popular type, due to its combination of strength, ease of installation, and cost-effectiveness. Applications include platforms, ventilation grates, stair treads, and safety covers. The available welded grating products include standard weld, close-mesh, railroad, and heavy-duty. Read more about welded bar grating.

Press-Locked: see load table
Press-locked grating features a system of perpendicular interlocking bars that provide a smooth, clean look. This makes it perfect for architectural applications where aesthetic sensibilities are of utmost importance. Press-locked grating can be produced from carbon steel, stainless steel or aluminum. Its surface can be treated by galvanizing, painting, or powder coating. Read more about press-locked grating.
Heavy-Duty: see load table
Heavy-duty bar grating provides maximum strength to accommodate heavier loads in industrial and commercial settings. It also has a long lifespan, making it ideal for demanding tasks over a long period of time. Standard widths are 2′, 3′, and 4′ in 20′ lengths. Standard bearing bars are 1/4″, 5/16″, and 3/8″ thick. Bars range from 1″ to 8″ deep. Read more about heavy-duty bar grating.
Aluminum: see load table
Swage-lock aluminum bar grating offers a lightweight alternative to heavier steel grating. It is manufactured with either “I” or rectangular bearing bars that are permanently locked to the crossbars via a swaging process, a technique that reshapes the rods. I-bar swage-locked is lighter weight and less costly than a rectangular bar grating with the same bar thickness. Read more about aluminum bar grating.
Bar Grating Stair Treads
As one of the leading bar grating suppliers in Texas, Marco Specialty Steel stocks a full line of stair treads, including bar grating stair treads. These stair treads are available in many different materials. All bar grating stair treads offer the unbeatable combination of superior strength, affordability, and ease of installation. Read more about bar grating stair treads.
Riveted: see load table
Riveted bar grating is special order only. Read more about riveted grating.
Bar Grating Metal Grades
Choose the Best Material for Your Bar Grating Products
We feature high-quality metal bar grating made from aluminum and steel in numerous styles for a wide range of applications.
- Carbon Steel: Carbon steel provides an economical, high-strength grating for use in most industrial and commercial applications.
- Aluminum: Lightweight, corrosion-resistant and non-sparking alloys make aluminum ideal for use in chemical, petroleum, hydro, and food processing plants, water and waste treatment facilities; munitions plants and other volatile areas; aboard ships; etc.
- Stainless Steel: Stainless steel bar grating is ideal for use in caustic atmospheres where corrosion resistance and minimum carbide precipitation are important considerations. It is especially applicable for chemical, food, and hydroprocessing areas.

Bar Grating Fabrication
We are the Leading Experts in Custom Bar Grating
Marco Specialty Steel only stocks the best-quality steel products. In addition to our huge inventory of stock bar grating products, we will custom-fabricate any of our products for your specific applications. Our facility includes an in-house fabrication shop equipped with the necessary tools and technical expertise to create the one-of-a-kind product that meets your requirements.
We will work with your existing drawings or blueprints to produce print take-offs that assist you in selecting the perfect aluminum or steel grating products for just about any application. Our team will work closely with you throughout your customization project. Our focus is on bringing your design concept to life to provide a custom bar grating solution that solves a problem in a timely, cost-effective manner.
Contact us today to see how our expert bar grating fabricators can help your job run smoothly.

Optional End Banding Available
If you need uniformity and added strength we will add end banding to support your bar grating panels. Banding is found in high-traffic areas, especially trenches.

Metal Bar Grating Accessories
You can count on Marco Specialty Steel to supply all essential bar grating accessories. Options include an assortment of G clips, Saddle Clips, Grate-Fast clips, Z Clips, and Weld Lugs. Our bar grating accessories are especially beneficial for custom applications that require maximum design and installation versatility and flexibility.
Anchoring Information
Our accessories page has a wealth of information regarding anchoring devices like clips, and also has welding specs. We provide reliable guidance regarding where and how to attach clips and other accessories to ensure they will provide the stability, support, and safety you need for a successful project outcome.

Bar Grating Uses
Uses and Applications
- Flooring
- Stairs, stair treads, and crossover platforms
- Sewage drain covers, manhole covers, forklift traffic, and loading ramps
- Racks and shelving
- Catwalks and crossover platforms
- Fire escapes, light guards, and loading ramps
- Mezzanines and platforms
- Infill panels
- Vessel internals and catalyst support grids
- Bridge sidewalks and bridge decking
- Architectural uses like building facades or partitions
- Security screens in residential and commercial buildings
Bar grating has a vast amount of uses ranging from flooring and stairs to bridges and sewage drain covers. It is a smart choice for flooring and stairs in work areas where slipping and falling are a major concern, such as industrial plants, wastewater treatment facilities, or manufacturing operations. The open design makes bar grating the best option for areas that require the passage of light. It also works well for projects that require fast, easy fabrication and installation.
Furthermore, metal bar grating often provides the best solution for situations requiring a high strength-to-weight ratio.




Frequently Asked Questions About Bar Grating
Below are some of the most common questions we receive about our industrial and architectural bar grating products.
What is bar grating?
Bar grating is a rigid grid of bearing bars and cross bars joined together to form an open flooring or decking surface. It’s commonly used for walkways, platforms, catwalks, crossovers, and vessel internals.
What types of bar grating does Marco Specialty Steel offer?
We offer welded, heavy-duty welded, press-locked, swage-locked, and aluminum bar grating, as well as stair treads. Each type has unique properties for load capacity, appearance, and application. We also provide custom manufacturing, fabrication, and finishing options.
What materials are available for bar grating?
Our bar grating is available in carbon steel, stainless steel, aluminum, as well as specialty alloys such as Inconel, Monel, and Hastelloy.
How is bar grating sized?
Bar grating is specified by bearing bar size, spacing, and cross bar spacing. Common sizes include 1″ × 3/16″ bearing bars with 19/16″ spacing. We can help you choose the right configuration for your load and span requirements.
How strong is bar grating?
Bar grating offers exceptional strength-to-weight performance. Welded and heavy-duty welded styles can support heavy industrial loads, while aluminum and stainless options provide lighter-weight strength for corrosion-prone environments. Load tables are available to help select the right type for your application.
Do you stock bar grating or make it to order?
Both. Marco Specialty Steel maintains a large in-stock inventory of steel bar grating and we custom manufacture panels to order. Stock sizes can also be cut and finished quickly to meet your project schedule.
What are common applications for bar grating?
Bar grating is used for platforms, catwalks, stair treads, mezzanines, drainage covers, crossover platforms, as well as vessel internals and catalyst support grids. It’s ideal for facilities in oil and gas, chemical processing, power generation, marine, and manufacturing industries.
What surface finishes are available for bar grating?
Our finishing options include mill, painted, powder-coated, aluminizing, or hot-dip galvanized steel. Galvanizing is the most popular option for corrosion resistance and extended service life in outdoor or wet environments.
We Make Customer Service a Top Priority
Our customer-focused business approach differentiates us from other bar grating distributors. We make every effort to complete every bar grating project as quickly as possible to help you maintain your tight production schedules. Our quarter-century of metal/steel industry experience also ensures you get the high-quality, reliable service you expect. Contact us today to find out why we are one of the best steel companies in Houston Texas.
To ensure total customer satisfaction, we’ve created some free online resources to make the ordering process seamless.
- Bar Grating Accessories List
- Bar Grating Definitions & Glossary
- How to Order Bar Grating
- Bar Grating Specific Considerations
- Bar Grating Installation Clearances
- Bar Grating Load Charts
- Bar Grating Manufacturing Tolerances
- Bar Grating Welding Standards
If you still can’t find what you’re looking for, contact us today by completing our contact form or calling our Houston office at (713)-649-5310. Find out how Marco is one of the top bar grating suppliers in the Houston area and beyond.


Bar Grating Products