GRP Grating Systems

High strength, durable and lightweight industrial gratings; providing maintenance free reliability in all environments.

Glass reinforced polymer (GRP) gratings offer an attractive combination of mechanical & physical properties and are a proven, ideal replacement for steel & aluminium gratings. They are available in a wide variety of structural, chemical & dimensional variants making them suitable for installations in all industrial & commercial environments.

All types exhibit key product features & benefits:

• Strong & durable – excellent loading ability
• Non corroding – no issues with rust, maintenance free, low life-cycle costs
• Impact resistant – will not crack or chip, maintains appearance
• Fire retardant – choice of resin type to meet required performance
• Chemical resistant – choice of options to suit all environments
• Low electrical & thermal conductivity – ideal near electrical installations
• Anti-slip surfaces – reduction in slip related accidents
• Relative light weight – reduced transport costs & load on existing structures
• Easy handling, fabrication & assembly – no welding

GRP Gratings are produced by two distinct manufacturing processes to offer either Moulded or Pultruded variants. Both types are composite products and combine fibreglass strands with thermosetting resins to form extremely strong panel structures. These two complimentary materials give GRP gratings excellent compressive and tensile strength.

Typical installation scenarios include:

• Access platform walkways
• Pedestrian bridges, steps & walkways
• Worker access to machinery
• Marina gangways
• Replacements for steel chequer plate or grid steps
• Replacements for wooden steps
• Marine vessel applications
• Water treatment works
• Offshore wind & oil facilities

MOULDED GRP gratings combine fibreglass rovings with a choice of thermosetting  resins to form an extremely strong one piece panel.

GRP gratings are proven to withstand the effects of chemical corrosion and are impact resistant and flame retardant.  A comprehensive range of sizes, mesh type & surface finishes are available.

Moulded GRP grating is available in the following types:

• Open mesh – concave surface
• Open mesh – gritted surface
• Covered (solid) top – gritted surface
• Micromesh
• Conductive top

Chemical – resin type options:

• Polyester – orthophthalic, isophthalic & isophthalic food grade
• Vinylester – standard or high flame resistant
• Phenolic – high flame resistance & low smoke

Dimensional – Options

• Heights from 15mm to 60mm
• Panel sizes typically from 1007 mm width up to 4047 mm length

PULTRUDED gratings are assembled from GRP bearer bars (either I or T section) and transversely linked with cross-rod sections to specified spacings, giving an open surface range from 33%-60%.

The bearer bars are formed from densely packed continuous fibreglass rovings, combined with a multi-directional glass mat reinforcement and wrapped in a surface veil of resin.  During the pultrusion process, the fibres are drawn through a bath of resin and into a die under high temperature & pressure. This forms the cured, finished section which is cut to the required lengths.

The core of continuous glass rovings provide the bar with high longitudinal strength and stiffness, while the glass mat reinforcement gives transverse strength and resists chips, cracks and fractures. The surface veil finish offers protection against corrosion & UV light degradation.

GRP gratings are proven to withstand the effects of chemical corrosion and are impact resistant and flame retardant.

Pultruded GRP Grating is available in the following types:

• Open structure
• Open structure gritted surface
• Covered (solid top) and gritted

Chemical – Resin type options:

• Polyester – orthophthalic or isophthalic
• Vinylester – standard or high flame resistant

Dimensional – Options

A choice of panel dimensions is available to order with heights from 25mm to 50mm and maximum finished size of 6100mm x 1220 mm.