Molded FRP Grating — Seamless Composite Construction
Molded FRP grating is the workhorse of the composite flooring world: a single, seamless panel of fiberglass and resin with no welds, rivets, or joints anywhere in its structure. GoGrating manufactures molded grating factory-direct in Anping, Hebei — China's grating production hub — and supplies EPC contractors, procurement engineers, and importers across the Middle East, Southeast Asia, Europe, Australia, the Americas, and the United States.
Every order is produced to project specification rather than pulled from a stock catalogue. You choose the mesh pattern, panel thickness, resin system, surface finish, and color; we mold, cut, and fabricate to your drawings. Molded grating is one of several lines in our FRP grating range, which also includes pultruded and covered grating, and it complements our steel grating for projects that mix structural and corrosive-service areas.
What is Molded FRP Grating?
Molded FRP grating is produced in a heated, open mold. Continuous glass-fiber rovings are laid in alternating layers — lengthwise and crosswise — and each layer is fully wetted out with thermoset resin before the next is placed. When the filled mold is cured, the entire panel solidifies as one piece: the bearing bars and cross-bars are not assembled or bonded together, they are literally the same continuous material.
This one-piece construction is what separates molded grating from welded steel grating and from pultruded FRP. Because the glass reinforcement runs in both directions, a molded panel carries load bidirectionally and tolerates cut-outs, penetrations, and field cutting without unraveling or losing its structure. Cut edges are simply sealed with resin to restore full corrosion protection.
The trade-off is span: pultruded FRP and steel grating achieve longer unsupported spans, while molded grating excels on standard support spacings where corrosion resistance, impact tolerance, and easy on-site fabrication matter most. If you are unsure which type fits your support layout, send us your structural drawings and we will recommend the right product against engineered load tables.
Molded FRP Specifications
Standard molded meshes include 38×38 mm, 25×25 mm, 19×19 mm, and 50×50 mm squares, with rectangular and micro-mesh patterns available to order. Panel thicknesses run from 12.7 mm to 63.5 mm (1/2" to 2-1/2"), and common mold sizes such as 1220×3660 mm and 1220×2440 mm are cut to your exact platform dimensions. Surfaces can be supplied with a concave (meniscus) top, a gritted anti-slip layer, a smooth finish, or a bonded cover plate.
Resin selection drives chemical performance: orthophthalic polyester for general industrial service, isophthalic polyester for moderate chemical exposure, and vinyl ester for aggressive acids, caustics, and solvents. Fire-retardant formulations meeting ASTM E84 Class 1 (flame spread ≤25) are available, and production runs under an ISO 9001 quality system with CE compliance where required. We do not publish generic load figures — deflection depends on mesh, thickness, span, and resin, so contact us for engineered load tables specific to your configuration.
Molded FRP Applications
Chemical and petrochemical plants are the classic home of molded grating: walkways, platforms, and trench covers around acid storage, electroplating lines, and chlor-alkali processes where galvanized steel corrodes in months. Water and wastewater treatment plants use it over clarifiers, aeration basins, and screening areas for the same reason, with the added benefit that a one-piece panel has no welds to fail in permanently humid, H2S-laden air.
Marine and offshore facilities specify molded grating for docks, seawater intake structures, and splash-zone platforms; food and beverage plants choose it for wash-down areas because it is impervious to cleaning chemicals and available in USDA-acceptable smooth-top formats. Its non-conductive, non-sparking nature also suits electrical substations and hazardous zones. See more end-use detail on our applications pages.
To get started, send your platform layout, support spacing, and chemical exposure conditions through our Request a Quote form — CAD files and marked-up drawings are welcome, and our engineers will return a mesh, thickness, and resin recommendation with the relevant load data.
| Construction | One-piece molded; continuous interwoven glass rovings, no joints |
| Mesh sizes | 19×19, 25×25, 38×38, 50×50 mm squares; rectangular meshes to order |
| Panel thickness | 12.7 – 63.5 mm (1/2" – 2-1/2") |
| Standard mold sizes | 1220×2440, 1220×3660, 1000×4040 mm — cut to project dimensions |
| Resin systems | Orthophthalic, isophthalic, vinyl ester |
| Surface options | Concave (meniscus), gritted anti-slip, smooth, covered plate |
| Colors | Yellow, green, grey, light grey; custom colors on request |
| Open area | Up to approx. 70%, depending on mesh pattern |
| Fire performance | ASTM E84 Class 1 (flame spread ≤25) formulations available |
| Quality & compliance | ISO 9001; CE where required; engineered load tables on request |
- Seamless one-piece construction — no welds, rivets, or mechanical joints to corrode or loosen
- Bidirectional load distribution from continuous interwoven glass rovings
- Resin systems matched to service: orthophthalic, isophthalic, or vinyl ester
- Non-conductive and non-sparking — suitable for electrical and hazardous areas
- Roughly one quarter the weight of comparable steel panels for easier handling
- Concave or gritted anti-slip walking surfaces as standard options
Frequently Asked Questions
Can molded FRP grating be cut and fabricated to my drawings?
Yes. Every order is custom-produced: panels are molded in standard sheet sizes, then cut to your platform dimensions with openings for pipes, columns, and equipment. Send CAD files or marked-up drawings with your quote request and we fabricate accordingly, sealing all cut edges with resin before shipment.
Is there a minimum order quantity and what is the typical lead time?
Because gratings are made to order rather than stocked, MOQ and lead time depend on mesh, thickness, resin, and fabrication scope. Small trial orders and container-load projects are both accommodated. Share your bill of quantities through the Request a Quote form and we will confirm a production schedule.
Which resin should I specify — orthophthalic, isophthalic, or vinyl ester?
Choose orthophthalic polyester for general industrial and architectural use, isophthalic for moderate chemical and outdoor exposure, and vinyl ester for aggressive acids, caustics, solvents, or elevated temperatures. If you provide your chemical exposure conditions, our engineers will recommend a resin and supply the matching corrosion-resistance data.
How does molded FRP grating compare with pultruded FRP and steel grating?
Molded grating carries load in both directions and tolerates field cutting, making it ideal for standard support spacings in corrosive areas. Pultruded FRP and steel grating achieve longer unsupported spans. We supply all three, so send your support layout and we will recommend the most economical option against engineered load tables.