Fiberglass Grating (FRP) Fiberglass Grating Product Options
Open Molding, or Molded Fiberglass Grating
Molded fiberglass grating is the older of the two processes. This type of FRP grating is available in square and rectangular grid patterns and provides equal strength in both directions. Its one-piece construction interlocks the strands for optimum strength. Molded FRP is lightweight and easily fabricated. Read more about molded FRP
Pultrusion, or Pultruded Fiberglass Grating
Pultrusion is a continuous molding process that makes use of glass or fiber reinforcement formed in a polyester or vinyl ester resin matrix. Marco offers pultruded grating in two standard resin systems that comply with Class 1 Flame Spread Rating in accordance with ASTM E-84 test standards. You can choose from a T-Bar or I-Bar profile. Read more about pultruded FRP.
Phenolic FRP
Phenolic fiberglass grating can either be molded or pultruded. The key benefit of phenolic FRP is its resistance to heat. Therefore, it is commonly used where high temperatures arise or are possible. Phenolic grating is widely used in the oil and gas industry for this reason. Marco offers phenolic fiberglass that is U.S. Coast Guard Approved. Read more about phenolic FRP.
Fiberglass Structurals
Fiberglass structural shapes are manufactured by the pultrusion process and have corrosion fighting properties. Marco offers FRP structurals that are lightweight (1/3 of steel) and pound for pound as strong as their steel counterparts. These structural shapes are the best long-lasting option. Read more about FRP structural shapes.
Fiberglass Grating Stair Treads
Fiberglass stair treads and stair tread covers are the best solutions for slippery stairs. FRP stairs come in molded or pultruded options and with either a meniscus top non-skid or a gritted top non-skid. Their safety aspects, corrosion resistance, and long-lasting ability make them the best cost-saving solution for commercial or industrial applications. Read more about FRP stair treads.
FRP Ladder Systems
Fiberglass ladder systems are lightweight and easy to install. These caged ladder systems require less maintenance and upkeep making them the best, cost-effective solution. They have non-slip rung surfaces, flame-retardant resins, and UV inhibitors. Marco offers custom options for fast, hassle-free installation. Read more about FRP ladder systems.
FRP Handrail Systems
Fiberglass handrail systems are manufactured by the pultrusion process and are made from structural components. Marco Specialty Steel constructs these handrails from your blueprints or drawings to produce the best, long-lasting guardrail. Read more about FRP handrail systems.
Stocked Warehouse of Fiberglass Grating Products
As a leading FRP grating supplier, Marco Specialty Steel stocks fiberglass grating, ready for quick shipments. We invite you to come visit our warehouse in Houston, Texas to get the best customer service in the industry. Our knowledgeable sales staff is here to help pick the best product for your project.
We are available 24/7. You can call our after-hours, rush service at (713) 705-5942
Fiberglass Grating Fabrication
Custom Fiberglass Grating Products to Meet Your Needs
A key reason why so many companies in industries such as refining, drilling, and food and beverage choose Marco Specialty Steel as their fiberglass grating distributor is our ability to provide custom fiberglass grating products. We have our own fully equipped in-house fabrication shop where we can customize any of our stock products to your specifications. We can produce everything from skewed or curved cutouts to special shapes with speed and efficiency. We routinely work with our clients’ drawings and blueprints to create print takeoffs that help create the custom fiberglass grating products that meet their unique requirements.
FRP Accessories
Marco Specialty Steel supplies various types of clips for FRP grating. We offer specialized attachments and clips that both fasten panels together as well as secure them to support structures. All clips are made of type 316 Stainless Steel and are available in 1”, 1-1/2”, and 2” sizes.
Fiberglass Grating Product Table, Pultruded and Molded
| Product | Product Page Linked | Name | Type | Thick / Open |
|---|---|---|---|---|
 | Click for page | Pultruded FRP T 10-18 | T Bearing Bar | 1″ Thick / 18% Open |
 | Click for page | Pultruded FRP T 15-17 | T Bearing Bar | 1.5″ Thick / 17% Open |
 | Click for page | Pultruded FRP T 20-50 | T Bearing Bar | 2″ Thick / 50% Open |
 | Click for page | Pultruded FRP I 15-40 | I Bearing Bar | 1.5″ Thick / 40% Open |
 | Click for page | Pultruded FRP I 10-50-ADA | I Bearing Bar | 1″ Thick / 50% Open |
 | Click for page | Pultruded FRP I 15-60-ADA | I Bearing Bar | 1.5″ Thick / 60% Open |
 | Click for page | Pultruded FRP T 10-33 | T Bearing Bar | 1″ Thick / 33% Open |
 | Click for page | Pultruded FRP T 15-33 | T Bearing Bar | 1.5″ Thick / 33% Open |
 | Click for page | Pultruded FRP I 10-40 | I Bearing Bar | 1″ Thick / 40% Open |
 | Click for page | Pultruded FRP I 15-50 | I Bearing Bar | 1.5″ Thick / 50% Open |
 | Click for page | Pultruded FRP I 10-60-ADA | I Bearing Bar | 1″ Thick / 60% Open |
 | Click for page | Pultruded FRP I 30-40-ADA | I Bearing Bar | 3″ Thick / 40% Open |
 | Click for page | Pultruded FRP T 10-35 | T Bearing Bar | 1″ Thick / 35% Open |
 | Click for page | Pultruded FRP T 15-50 | T Bearing Bar | 1.5″ Thick / 50% Open |
 | Click for page | Pultruded FRP I 10-50 | I Bearing Bar | 1″ Thick / 50% Open |
 | Click for page | Pultruded FRP I 15-60 | I Bearing Bar | 1.5″ Thick / 60% Open |
 | Click for page | Pultruded FRP I 15-40 | I Bearing Bar | 1.5″ Thick / 40% Open |
 | Click for page | Pultruded FRP I 30-50 | I Bearing Bar | 3″ Thick / 50% Open |
 | Click for page | Pultruded FRP T 10-50 | T Bearing Bar | 1″ Thick / 50% Open |
 | Click for page | Pultruded FRP T 20-33 | T Bearing Bar | 2″ Thick / 33% Open |
 | Click for page | Pultruded FRP I 10-60 | I Bearing Bar | 1″ Thick / 60% Open |
 | Click for page | Pultruded FRP I 10-40 | I Bearing Bar | 1″ Thick / 40% Open |
 | Click for page | Pultruded FRP I 15-50 | I Bearing Bar | 1.5″ Thick / 50% Open |
 | Click for page | Molded FRP 1″ x 1″ x 4″ | Rectangular Grid | 1″ Thick / 68% Open |
 | Click for page | Molded FRP 1.5” x 1.5” x 1.5” | Square Grid | 1.5″ Thick / 68% Open |
 | Click for page | Molded FRP 1.5” x 1.5” x 6” | Rectangular Grid | 1.5″ Thick / 55% Open |
 | Click for page | Molded FRP 0.5” x 1.5” x 1.5” | Square Grid | 0.5″ Thick / 72% Open |
 | Click for page | Molded FRP 2” x 2” x 2” | Square Grid | 2″ Thick / 71% Open |
 | Click for page | Molded FRP 0.5” x 2” x 2” | Square Grid | 0.5″ Thick / 78% Open |
 | Click for page | Molded FRP 1.5” x 0.75” x 0.75” | Square Grid | 1.5″ Thick / 44% Open |
 | Click for page | Molded FRP 1” x 1.5” x 1.5” | Square Grid | 1″ Thick / 69% Open |
 | Click for page | Molded FRP 1.5” x 1” x 6” | Rectangular Grid | 1.5″ Thick / 38% Open |
We Specialize in FRP Grating
We feature a wide assortment of fiberglass reinforced plastic (FRP) grating products. FRP is a precise combination of thermosetting plastic resins and glass fiber that offers corrosion resistance and other desirable properties listed above. FRP grating systems are frequently used in the manufacturing of a large assortment of products including stair treads, platforms, covered gratings, trench covers, and drain covers.
As a leading fiberglass grating supplier, Marco Specialty Steel offers top-quality FRP grating products featuring the two primary manufacturing processes: open molding and pultrusion.
Frequently Asked Questions About Fiberglass (FRP) Grating
What is fiberglass (FRP) grating?
Fiberglass grating, also known as FRP grating, is a lightweight, corrosion-resistant alternative to steel grating made from fiberglass reinforced plastic. It is commonly used in corrosive, wet, or electrically sensitive environments.
What’s the difference between molded and pultruded FRP grating?
Molded FRP grating is manufactured in one piece using interwoven fiberglass strands, providing equal strength in both directions and excellent corrosion resistance. Pultruded FRP grating uses continuous fiberglass bars mechanically assembled for higher load capacity and longer spans.
What types of fiberglass grating do you offer?
Marco Specialty Steel offers molded FRP grating, pultruded FRP grating, and phenolic FRP grating. Phenolic fiberglass grating is available in both molded and pultruded configurations, depending on load and fire-resistance requirements.
What is phenolic grating and why choose it?
Phenolic grating is a type of fiberglass grating made with phenolic resin, offering superior fire resistance, low flame spread, and reduced smoke generation compared to standard polyester or vinyl ester resins. It is often specified for offshore platforms, refineries, and applications with strict fire and safety requirements.
What are the advantages of fiberglass grating compared to steel grating?
Fiberglass grating is corrosion-resistant, non-conductive, lightweight, slip-resistant, and low-maintenance. Unlike steel, it will not rust or corrode, making it ideal for harsh industrial environments.
What resin systems are available for fiberglass grating?
Common resin systems include polyester, vinyl ester, and phenolic resins. Each offers different levels of chemical resistance, fire performance, and temperature tolerance. Our team can help select the appropriate resin based on your environment.
What surface options are available for molded fiberglass grating?
Molded fiberglass grating is available with a meniscus (concave) surface or a grit-top surface for enhanced slip resistance. Solid-top panels are also available when liquid containment or full coverage is required.
Is fiberglass grating electrically conductive?
No. Fiberglass grating is non-conductive, making it ideal for electrical substations, offshore platforms, and environments where electrical safety is a concern.
Why is pultruded grating stiffer than molded grating?
Pultruded grating is stiffer because it is constructed using continuous, unidirectional fiberglass bearing bars that carry load more efficiently over longer spans. Molded grating distributes strength evenly in both directions but is typically more flexible than pultruded grating under the same load conditions.
Do you fabricate FRP or cut it to size?
Yes. Marco Specialty Steel can cut and fabricate FRP grating to your exact dimensions. FRP grating can also be field-cut using standard carbide-tipped tools.
Are hold-down clips required for fiberglass grating?
Yes. Hold-down clips are used to secure fiberglass grating panels to their supporting structure, preventing movement or uplift. Marco Specialty Steel supplies FRP-compatible hold-down clips designed to meet safety and installation requirements for molded and pultruded grating.
What industries use fiberglass grating?
Fiberglass grating is widely used in chemical processing, offshore oil and gas, wastewater treatment, pulp and paper, power generation, marine, and food processing facilities.
What other FRP products does Marco offer?
In addition to fiberglass grating, Marco Specialty Steel offers a large range of FRP structural shapes, stair treads, and handrails.
Why choose Marco Specialty Steel for fiberglass grating?
Marco Specialty Steel stocks molded and pultruded grating, as well as stair treads, and provides fabrication services from our Houston facility. Our team has experience specifying grating for corrosive and industrial environments, with nationwide shipping available.