Molded FRP grating, also called molded fiberglass or fibreglass grating, is an open-mesh panel formed by molding continuous glass reinforcement within a thermosetting resin matrix. It is commonly used for industrial walkways, platforms, trench covers, and other access areas where an open mesh surface is required. Selection depends on the grating depth, mesh size, resin system, surface finish, support conditions, and project loads.
Molded FRP Grating Overview
Molded FRP grating is produced by forming continuous glass reinforcement within a resin matrix to create a molded panel. The reinforcement is arranged in multiple directions, and the grating is available in different depths, mesh configurations, and surface finishes according to the selected product configuration. Common resin options include isophthalic polyester and vinyl ester systems, depending on the specified configuration.
Molded FRP Grating Selection Factors
The selected configuration should match the intended use, support arrangement, environmental exposure, and project requirements. Key factors include:
- Panel depth – affects the grating’s span and deflection characteristics under applied loads. The appropriate depth depends on support spacing, applied loads, and allowable deflection requirements.
- Mesh size – affects opening characteristics, drainage, and suitability for different access conditions.
- Resin system – is an important consideration where chemical exposure or other project-specific environmental requirements apply. Common options include isophthalic polyester and vinyl ester systems, depending on the selected configuration.
- Surface finish – options such as concave surfaces and grit-top finishes provide different surface textures for access areas and may be selected according to the intended use and surface requirements.
For structural applications, the selected grating configuration should be checked against the applicable load information, support arrangement, and project requirements rather than applying a single span or load assumption to all molded FRP grating configurations.
Molded FRP Grating FAQs
What determines the span of molded FRP grating?
Span depends on factors including panel depth, support spacing, applied load, and allowable deflection requirements. The appropriate span should be determined for the selected grating configuration and project conditions rather than using one span value for all molded FRP grating products.
Can molded FRP grating be field-cut around obstacles?
Molded FRP grating can be field-cut to accommodate pipes, columns, equipment, and other dimensional requirements. 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.
