Molded FRP grating, also referred to as molded fiberglass or fibreglass grating, is an open-mesh structural panel formed by molding continuous glass reinforcement within a thermosetting resin matrix. It is used for industrial walkways, platforms, trench covers, and other access areas where an open mesh surface is required. Selection depends on factors such as panel depth, mesh size, resin system, surface finish, support conditions, and project loads.
Product Family Overview
Molded FRP grating is produced by forming continuous glass rovings within a resin matrix in a molded panel construction. The resulting panel incorporates reinforcement in multiple directions and is supplied in different depths, mesh configurations, and surface finishes depending on product specification. Common resin options include isophthalic polyester and vinyl ester systems, subject to the selected configuration.
Selection Considerations
When specifying molded FRP grating, several engineering variables should be considered because the selected configuration affects its suitability for the intended application:
- Panel depth – influences span capacity and deflection under load. The appropriate depth depends on support spacing, applied loads, and allowable deflection requirements.
- Mesh size – affects opening characteristics, drainage, and suitability for different access and traffic conditions.
- Resin system – is an important consideration for chemical exposure and fire-performance requirements. Common options include isophthalic polyester and vinyl ester systems, depending on the specified product configuration.
- Surface finish – options such as concave surfaces or grit-top finishes provide different surface characteristics for access areas where additional slip resistance may be required.
Selection depends on the anticipated loads, support spacing, environmental exposure, resin system, surface requirements, and other applicable project conditions. Where structural capacity is critical, the selected configuration should be checked against the applicable product data and project requirements.
Frequently Asked Questions
What maximum span can molded fiberglass grating achieve?
Span capacity depends on panel depth, support spacing, applied load, and allowable deflection requirements. The appropriate span should be determined for the selected grating configuration and project conditions. Refer to the applicable product data or load information for the selected configuration rather than applying a single span value to all molded grating products.
Can molded grating be field-cut to fit around obstacles?
Molded FRP grating can be field-cut to accommodate pipes, columns, equipment, and other panel dimensions. Cutting exposes glass reinforcement at the modified edge, so exposed areas should be re-sealed with a compatible resin system where required by the product and installation conditions. Any cut-out or dimensional modification should also be checked against the applicable support arrangement and project requirements.
