Molded Fiberglass Grating
- Wide range of high-performance resins
- Fire retardant, meeting ASTM E84 and ASTM D635
- Electronically transparent and non-conductive
- Easily fabricated and virtually maintenance free
Molded Fiberglass Grating
Molded Square Mesh
Our most popular FRP product, molded square mesh grating is available in 1”, 1-1/2”, and 2” depths. The 1” and 1-1/2” deep products are produced with a 1-1/2” square mesh while the 2” deep products are produced with a 2” square mesh. The square pattern of the panels provides bi-directional strength and facilitates easy layout and fabrication.
Popular resins include economical Corvex polyester, superior Vi-Corr vinyl ester, and other application specific resins. All products are available with the standard concave meniscus surface or optional grit surface (coarse or fine grit).
For a further details on mesh openings and panel sizes, please view our Sizes & Options.
Molded Rectangular Mesh
Available in 1” deep, 1” x 4” pattern, rectangular mesh FRP gratings are commonly used for walkways and trench applications. When selecting rectangular mesh grating it is important to specify the span (rectangular opening) of the grating perpendicular to the supporting structure.
Like our square mesh products, popular resins include economical Corvex polyester, superior Vi-Corr vinyl ester, and other application specific resins. All products are available with the concave meniscus surface or the optional grit surface (coarse or fine grit).
For further details on mesh openings and panel sizes, please view our Sizes & Options.
Micro-Mesh® Molded Grating
The 1/2” square opening of Micro-Mesh molded FRP gratings is ADA conforming and makes them popular for applications in the public way. Available in 1” or 1-1/2” depths, Micro-Mesh has bi-directional strength which facilitates efficient layout and fabrication.
Available in the full range of resins offered for molded products, Micro-Mesh surface options are concave meniscus, optional smooth (sanded) surface, or optional coarse or fine grit surfaces.
For a further details on mesh openings and panel sizes, please view our Sizes and Options.
Ecograte® 62
Vinyl ester resin system with a flame spread rating of 25 or less for dependable resistance to both acidic and alkaline environments.
ADA compliant Ecograte 62 is specifically designed to meet requirements of the National Marine Fisheries Service and U.S. Army Corps of Engineers for marine decking and docks. With a 3/4” x 4” mesh and 62% open area, this grating protects seagrass and other shallow marine habitats beneath docks. Ecograte®62 comes with a standard coarse grit walking surface or the optional Aqua Grit (fine grit) surface which provides increased comfort under bare feet.
Standard colors: light or dark gray
Stock panels: 4’ x 8’, 4’ x 10’, or 4’ x 12’
Weight per square foot: 3.0 lbs.
Molded Fiberglass Sizes & Options, and Load Tables
Standard Resins & Colors
Corvex®
This isophthalic polyester resin system outperforms a number of competitive fiberglass and metal products. Corvex meets the requirements for corrosion resistance found in industrial, chemical processing, and water/wastewater applications.
Flame Spread: ASTM E84 rating of 25 or less.
Certifications: meets the USCG requirements for general fire rating*.
Standard colors: yellow, light gray, dark gray, or green.
Vi-Corr®
A superior vinyl ester resin developed for reliable performance in the toughest environments. It offers outstanding resistance to a wide range of highly corrosive situations, from caustic to acidic.
Flame spread: ASTM E84 rating of 25 or less.
Certifications: DNV GL Type Approval No. TAF000003C; ABS Type Approval No. 01-HS34733-X; meets the USCG requirements for general fire rating*.
Standard colors: orange or dark gray.
FGI-AM®
This food-grade isophthalic polyester resin system offers antimicrobial properties to inhibit the growth of bacteria on the surface of the composite to protect the product itself. FGI-AM provides the necessary corrosion resistance to meet the requirements of the food and beverage industry. This product is intended only for non-public health uses.
Flame Spread: ASTM E84 rating of 25 or less.
Certifications: USDA Approvable.
Standard colors: light gray or green.
XFR
This extra fire-retardant vinyl ester resin is recommended for use where fire potential is high.
Flame Spread: ASTM E84 rating of 10 or less.
Certifications: meets the USCG requirements for general fire rating*.
Standard color: dark gray.
ELS
This extremely low smoke resin is an acrylic-modified polyester system that is ideal for tunnel, offshore, mass transit and other confined space applications. ELS exhibits low ignitability, low smoke generation and extremely low smoke toxicity.
Flame Spread: ASTM E84: flame spread index of 25 or less, a smoke developed index of 100 or less and Fuel Contribution of 0.
Certifications: DNV GL Type Approval No. TAF000003C; meets the USCG requirements for general fire rating*.
Standard color: dark gray.
Super Vi-Corr®
This family of resin systems consists of more than 30 custom formulas engineered to provide corrosion control solutions in applications that are too severe for conventional FRP and other building materials. Each Super Vi-Corr resin was engineered for the best possible performance in specific chemical and/or elevated temperature environments.
These systems exist for aggressive chemical environments with exposure to solvents, acidic oxidizers, chlorine dioxide, sodium hypochlorite and liquid desiccants. Certain formulas are also suited for elevated temperature applications up to 400° F. Super Vi-Corr gratings are typically used for packing hold-downs and support in environmental and process scrubber applications.
Flame Spread: non fire retardant, unless specified.
Standard color: natural – tan to beige.
*For specific requirements and questions, please contact technical services.
Custom colors are available on special order, subject to minimum quantity requirements.
For further information on resins and chemical resistance, please view the Chemical Resistance Guide.
Molded Fiberglass Grating Surface Options
Grating Pacific’s molded fiberglass grating comes with a meniscus surface. Additional applied grit slip resistant surfaces are available and recommended based on the type of application. Desired surface options must be specified at the time of ordering.
Meniscus Surface
Also known as a concave surface. This surface provides some slip-resistant as the middle surface of the bearing bars curves slightly downward compared to the edges of the bearing bars. This process occurs as the resins set in the prescision moldes used to make molded fiberglass grating.
Standard Coarse Grit
This coarse grit surface is integrally-applied across the top of the bearing bars. This surface option should be selected for industrial applications where maximum slip resistance is required.
Aqua Grit
Also known as a sugar grit surface, this optional surface is also an integrally-applied grit surface. Aqua Grit is a slip resistant surface that is recommended for applications that involve barefoot traffic such as docks, water parks, an other aquatic recreation areas.
Fiberglass Grating Fabrication & Services
Engineering Services
Grating Pacific offers complete engineering services from concept to production. Available services include:
- Design consultation
- Technical manuals
- Field technical representatives
- CAD drafting
- Engineering certification
- Custom design services
FRP Panel Fabrication
Our fully trained production staff will transform stock panels into custom components to your exact specification. We layout and cut our products to any configuration, install fastening or lifting devices, and custom cut stair treads to precise tolerances. Shop fabrication eliminates the need for dust containment and scarp disposal at the project site.
Post-fabrication, all pieces are properly resin sealed to assure maximum life. All parts are piece marked to matching installation drawings which accompany product shipment.
FRP Structural Fabrication
We proudly offer in-house fabrication of FRP structures including:
- Catwalks
- Stairs
- Handrails
- Ladders
- Supporting structures
Services provided include CAD design, engineering certification, full fabrication, and delivery. Fiberglass structures and flooring can ship “knocked down” ready for field installation, partially assembled, or fully assembled subject to transportation restrictions.
Chemical Resistance Guide
When selecting a fiberglass grating resin, it is important to know what corrosive agents the grating will be exposed to once it is installed. This Chemical Resistance Guide is based on extensive experience with fiberglass grating. As actual use conditions differ, the end user must test the grating for use under actual conditions. Grating Pacific’s technical service representatives are available to discuss the specifics of each project and assist our customers in selecting the best resin for their project.
Fiberglass Grating Fasteners
All FRP grating should be securely fastened to its supporting structure to protect the grating and increase product service life. Specialty clips manufactured from type 316 stainless steel are available for all fiberglass products. Clips can be used to attach grating or plate to the supporting structure or fasten adjacent grating panels to minimize load induced differential deflection.
Maximum recommended clip spacing is 48 inches on center with a minimum of four (4) clips per piece of grating.
Type “M” Saddle Clip
Used to secure molded or pultruded panels to a support using two adjacent bearing bars. Bolt not included with standard clip order.
Type “J” Hold Down Clip
Used to secure molded grating to a support using one bearing bar. Bolt not included with standard clip order.
Type “F” End Panel Clip
Used to connect adjacent molded FRP Panels. Fastening bolt included with clip order.
Type “E” Hold Down Clip
Specifically designed to attach Ecograte62 molded grating to supporting structures. Bolt not included with standard clip order.
Type “FC” Hold Down Clip
Type “FC” clips are used to secure pultruded grating to adjacent supports. Bolt not included with standard clip order.
Type “G” Friction Clip
Used to attach molded or pultruded grating to support flanges that are less than ¾” thick. Type “G” Hold Down clips are a friction clip and do not require drilling into the support flange. Fastening bolt included with clip order.
Type W Clip
Used to secure covered grating or plate to supporting structures. Bolt not included with standard clip order.
Type WLP Clip
Used to secure covered grating or close mesh FRP grating to supporting structures. Bolt not included with standard clip order.
