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GRP Flowtread

FlowTread Pultruded GRP grating is capable of achieving longer spans and a higher load capacity than the standard moulded GRP systems, it’s a lightweight and durable solution for walkways, platforms, gullies and drainage covers.
We offer several aperture openings to meet ball baring drop through tests for various applications in accordance with BS 4 EN standards.
FlowTread HD range is available to maximise vehicle load applications.
The Isophthalic Polyester Grating panels are suitable for general use where factors such as high-strength, non-conductive, lightweight and corrosion resistant applications are required.
Panels are up to 50% lighter than steel gratings and are finished in a hard wearing anti-slip gritted surface – compliant to National and Internationally recognised standards.
This product is also available in Phenolic with its excellent Fire Retardant Properties that meet BS476 Part 7 Class 0, US Coastguard level II approval and section 12 of London underground standards for low smoke and low toxicity use in tunnels.

Available Sizes


25mm, 38mm, 45mm, (50mm in our HD range)



152x25mm (40% open), 152x30mm (48% open), 152x34mm (55% open)

All the above are minimum 20mm ball proof except HD range which are 35mm ball proof.

HD range: HD3000:150x22mm, HD5000:150x30mm, HD6000:150x38mm


Load Baring:

3.0kN/m^2 – 5.0kN/m^2 – 7.5kN/m^2


Standard Panels:

6000x1000mm & 6000x1200mm

HD range: 5600x510mm & 5600x760mm


Standard Colours:

Dark Grey RAL 7043, Light Grey RAL 7040, Yellow RAL 1003, Yellow RAL 1021, Antique Brown, (Other standard RAL’s can be supplied upon request subject to increased leadtimes)


Fire Rating:

ASTM E84 Class1 <25mm, ASTM E84 Class 0 <5mm & USG Level II Approved

To Request a Quote

  1. Determine the loading criteria for your grating
  2. Choose your required mesh size (including depth of product)
  3. Determine your maximum clear span (open area between supports) and using the product finder on our website.
  4. Choose a colour.
  5. Select your surface type

Building Information Modelling (BIM)

Following the government mandate on BIM level 2 requirements throughout the supply chain for all government funded projects, Lionweld Kennedy have built on our existing processes to become fully BIM level 2 compliant. Our internal processes are aligned with the requirements of PAS1192-2:2013 to ensure full BIM compliance and ensure we are prepared for fully collaborative working practices in line with specific client requirements. Using our primary BIM authoring software Tekla Structures, which is aligned to our in house manufacturing processes we have developed our comprehensive BIM object library available for download.

Login in to our BIM section to obtain: –

  • Data sheets
  • 3D Models
  • IFC Files