Frequently Asked Questions About FRP Grating & Walkway Platforms

Absolutely. FRP grating is one of the most popular flooring and platform solutions for chemical plants because of its outstanding corrosion resistance. It withstands exposure to acids, alkalis, solvents, and other harsh chemicals that would quickly destroy steel or aluminum grating. For specific chemical resistance, the resin system can be tailored — vinyl ester and phenolic resins offer superior performance in highly aggressive chemical environments. FRP is also non-conductive, reducing the risk of electrical hazards.

FRP grating is significantly lighter than steel (about 75% lighter), non-corrosive, electrically non-conductive, and requires virtually no maintenance. Steel grating is less expensive upfront and has higher raw strength but requires regular painting and anti-corrosion treatment, especially in harsh environments. Over the lifecycle, FRP grating often proves more cost-effective when factoring in maintenance, replacement, and downtime costs. For applications involving chemical exposure or high humidity, FRP is nearly always the superior choice.

FRP grating typically lasts 20 to 30 years or more, depending on the application environment and resin formulation. In corrosive environments where steel grating would rust within a few years, FRP grating continues to perform without degradation. Premium-grade vinyl ester resin systems offer even longer service life in highly aggressive chemical environments. Unlike steel, FRP does not rust, rot, or corrode, which significantly reduces lifecycle replacement costs.

FRP (Fiberglass Reinforced Plastic) grating is a lightweight, high-strength composite material made from fiberglass reinforcements embedded in a resin matrix. It is manufactured in molded or pultruded formats and is widely used as flooring, walkway platforms, trench covers, and industrial decking. FRP grating offers excellent corrosion resistance, slip resistance, and durability, making it ideal for harsh environments such as chemical plants, offshore platforms, and water treatment facilities.

FRP grating can be installed using several methods. For walkway platforms, panels are typically secured to a support structure using hold-down clips, saddle clips, or countersunk screws. The grating panels can be cut to size on-site using standard woodworking tools with carbide-tipped blades. A minimum bearing width of 1 inch (25 mm) on each support is recommended. Cut edges should be sealed with a compatible resin to prevent moisture wicking. Always follow the manufacturer's installation guidelines for load-bearing and fastener spacing requirements.

FRP grating typically costs between and per square foot, depending on the type (molded vs. pultruded), resin system (polyester, vinyl ester, or phenolic), thickness, and surface finish. While the upfront cost of FRP grating is higher than steel, the total cost of ownership over 20+ years is often lower due to zero maintenance, no painting, no corrosion damage, and a much longer service life. Contact our sales team for a project-specific quotation.

Molded FRP grating is manufactured by interweaving continuous fiberglass rovings with a resin mixture in a heated mold under pressure, creating a one-piece panel with an integrated slip-resistant surface. Pultruded FRP grating is made by pulling fiberglass strands through a resin bath and then through a heated die to create individual load-bearing bars, which are then assembled into panels using cross rods. Molded grating is more economical, lighter, and better for general-purpose applications, while pultruded grating offers higher strength-to-weight ratios and is preferred for heavy-load and long-span applications.

Yes, FRP grating is inherently slip-resistant. The most common type — molded FRP grating — features a concave/convex surface pattern with grit top (silica particles embedded into the surface), providing excellent traction in both dry and wet conditions. This makes it a preferred choice for walkways, platforms, mezzanines, and other areas where slip hazards are a concern. For additional slip resistance, a grit-coated surface can be specified during manufacturing.

FRP grating load capacity varies by type and thickness. Standard molded FRP grating with a 1.5-inch thickness typically supports concentrated loads of 250-400 lbs per square foot, with deflection under 0.25 inches. Pultruded FRP grating can handle even higher loads, with some configurations supporting over 500 lbs per square foot. For specific load requirements, engineers should consult load/deflection tables provided by the manufacturer. FRP grating is designed to meet OSHA, ANSI, and other international safety standards.

A standard FRP walkway platform (molded grating, 1.5 inch thickness) supports concentrated loads of up to 400 lbs per square foot without permanent deformation. Pultruded grating platforms can support up to 600+ lbs per square foot for heavy industrial applications. The actual load capacity depends on the grating type, thickness, span width, and support spacing. Always cross-reference with the manufacturer's load tables before finalizing your platform design.