Fiberglass Molded Gratings - Corrosion-Resistant Industrial Flooring
What Are Fiberglass Molded Gratings?
Fiberglass molded gratings are one-piece structural panels made from fiberglass rovings and thermosetting resins. These bi-directionally strong panels serve as corrosion-resistant alternatives to steel gratings in industrial, marine, and chemical processing environments. With approximately 65% resin content, they provide chemical resistance and durability for applications where metal gratings may corrode. As an FRP profile manufacturer, we can help select the right resin system for your molded grating application.
Key Features
Structural Advantages:
Bi-directional strength allows large openings up to 10 inches without additional support
Lightweight yet strong – easier to handle and install than metal alternatives
No welding or special tools required for installation
Chemical and Environmental Resistance:
High resin content (65%) provides chemical resistance in many environments
Available in multiple resin systems: polyester, vinyl ester, and phenolic
Isophthalic polyester resins offer improved chemical resistance compared with standard polyester
UV-stabilized formulation helps reduce degradation from sun exposure
Resists rust and does not require protective coatings in many applications
Safety Features:
Slip-resistant surfaces with concave meniscus or grit top options
Fire retardant formulations available (ASTM E-84 compliant)
Non-conductive properties for electrical safety
ADA-compliant configurations available
Common Sizes and Specifications
Standard Panel Sizes
4 ft x 12 ft (1220 mm x 3660 mm) – Common industry size
4 ft x 8 ft (1220 mm x 2440 mm) – Versatile for various applications
3 ft x 10 ft (914 mm x 3048 mm) – Used for walkways
5 ft x 10 ft (1524 mm x 3048 mm) – Large area coverage
2 ft x 4 ft (610 mm x 1220 mm) – Small areas and repairs
Thickness Options
1 inch (25 mm) – Light pedestrian traffic
1.5 inches (38 mm) – Standard for most applications
2 inches (50 mm) – Heavy-duty requirements
Mesh Patterns
1.5″ x 1.5″ (38 mm x 38 mm) – Common mesh size
1″ x 4″ (25 mm x 102 mm) – Rectangular mesh for drainage
Mini mesh and custom patterns – Available for specific needs
Primary Applications
Chemical Processing Plants:
Platform flooring around tanks and vessels
Walkways in corrosive environments
Stair treads and maintenance areas
Water Treatment Facilities:
Clarifier covers and walkways
Pump station flooring
Biological treatment platforms
Marine Applications:
Marina dock surfaces
Offshore platform decking
Coastal walkway systems
Industrial Facilities:
Car wash flooring
Food processing areas
Manufacturing walkways and platforms
Material Properties
Operating Temperature: -50°F to 200°F (-45°C to 93°C) typical range
Water Absorption: Less than 0.3%
Flexural Strength: Up to 23,000 psi (158 MPa)
Service Life: 20+ years in typical applications
Molded vs. Pultruded Gratings
Feature
Molded Grating
Pultruded Grating
Strength Direction
Bi-directional
Primarily unidirectional
Chemical Resistance
Higher resin content (65%)
Lower resin content (35-40%)
Best Applications
Corrosive environments, general industrial
Heavy loads, long spans
Cost
Generally lower initial cost
Higher initial cost
For more information about pultruded alternatives, explore our FRP pultruded profiles collection or learn about the pultrusion machines and pultrusion dies used in production.
Installation and Standards
Easy Installation:
Cut and drill with standard carbide tools
Compatible with stainless steel fasteners
No special equipment required
Compliance:
ASTM F3059 standard specification
U.S. Coast Guard approved for marine use
ADA compliant options available
Related Capabilities
Pultruded FRP profiles
FRP rebar
Pultrusion machines
Pultrusion dies
Need fiberglass molded gratings for your project? Contact our team for a quote and technical assistance.
FAQ
What is fiberglass moulded grating used for?
Fiberglass moulded grating is commonly used for walkways, platforms, stair treads, trench covers, catwalks, and industrial flooring. It is especially useful in environments where slip resistance, corrosion resistance, and low maintenance are important.
What are the advantages of fiberglass moulded grating over steel grating?
Fiberglass moulded grating is lighter than steel, resists rust, and performs well in wet, corrosive, and chemical environments. It also provides electrical non-conductivity and can reduce long-term maintenance costs compared with painted or galvanized metal grating.
Where is fiberglass moulded grating commonly installed?
It is widely installed in chemical plants, wastewater treatment facilities, marine areas, food processing plants, power facilities, and industrial walkways. It is also used in areas that need anti-slip performance and safe access for workers.
Can fiberglass moulded grating be used outdoors?
Yes. Fiberglass moulded grating is suitable for outdoor use because it resists moisture, salt exposure, chemicals, and weathering better than many traditional metal materials. This makes it a practical choice for docks, platforms, rooftop access, and exterior walkways.
What sizes and configurations are available?
Fiberglass moulded grating is available in different panel sizes, thicknesses, mesh openings, and surface options to match specific load and installation requirements. Custom cutting and project-specific configurations are also available.
Is fiberglass moulded grating slip resistant?
Yes. One of the main advantages of moulded grating is its anti-slip surface, which helps improve safety in wet, oily, or high-traffic areas. It is often selected for locations where workers need stable footing and reliable access.
Can fiberglass moulded grating be customized?
Yes. It can be customized in panel size, thickness, color, resin system, and load-bearing specification to suit different industrial and architectural applications. Custom fabrication also helps match site conditions and installation needs.
What industries use fiberglass moulded grating most often?
Fiberglass moulded grating is widely used in chemical processing, water and wastewater treatment, marine engineering, food processing, oil and gas, utilities, and general industrial construction. It is chosen when safety, durability, and corrosion resistance are key priorities.
