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…
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 pultrusion molding in either a T-Bar or I-Bar profile. Read more…
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…
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…
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…
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 as well as modular kits for fast, hassle-free installation. Read more…
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…

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

Custom Fiberglass Grating Products
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.
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.