Machine Moulded & Pultruded Gratings
Heavy-duty industrial walkways and platforms.
Product Overview
We offer a premium range of FRP Gratings, available in both Machine Moulded and Pultruded variants. Our Moulded Gratings offer bi-directional strength and excellent impact resistance, making them perfect for platforms and walkways. Pultruded Gratings provide superior unidirectional strength for heavy load-bearing applications over longer spans. Both types are non-conductive, fire-retardant, and corrosion-resistant, offering a safe and durable alternative to steel gratings.
Key Features & Specifications
- Types: Machine Moulded (Bi-directional), Pultruded (Unidirectional)
- Surface: Anti-skid grit, Meniscus, or Chequered plate top
- Features: Fire retardant, Non-sparking, UV resistant
- Application: Walkways, Platforms, Trench covers, Stair treads
Materials & Engineering
We select resin systems and reinforcement grades tailored to resist chemical attack and temperature extremes:
- Isophthalic polyester for standard applications
- Vinyl ester for higher chemical resistance
- Fire-retardant resins for enclosed platforms
- E-glass or ECR-glass reinforcement
- Integral anti-skid grit topping
Comprehensive criteria breakdown across the standard thickness configurations offered by GPPL:
| Criteria | 25 MM | 30 MM | 38 MM |
|---|---|---|---|
| Panel Size | 1220 x 3660 mm | 1220 x 3660 mm | 1205 x 3646 mm |
| Load Bearing Capacity | 250 kg/m² | 370 kg/m² | 490 kg/m² |
| Resin Used | PTA / Isophthalic / Vinyl Ester | PTA / Isophthalic / Vinyl Ester | PTA / Isophthalic / Vinyl Ester |
| Top Finish | Plain / Anti-skid | Plain / Anti-skid | Plain / Anti-skid |
| Colour | Customisable | Customisable | Customisable |
Select a thickness profile below to inspect recommended safe Uniformly Distributed Loads (UDL) and deflection test statistics:
| Clear Span (mm) | Safe UDL (kg/m²) | Allowable Deflection (mm) | Typical Actual Deflection (mm) |
|---|---|---|---|
| 600 mm | 450 kg/m² | 3 mm | 2.2 mm |
| 700 mm | 350 kg/m² | 3.5 mm | 2.8 mm |
| 800 mm | 250 kg/m² | 4 mm | 3.5 mm |
| Clear Span (mm) | Safe UDL (kg/m²) | Allowable Deflection (mm) | Typical Actual Deflection (mm) |
|---|---|---|---|
| 700 mm | 520 kg/m² | 3.5 mm | 2.5 mm |
| 800 mm | 430 kg/m² | 4 mm | 3.1 mm |
| 900 mm | 370 kg/m² | 4.5 mm | 3.8 mm |
| Clear Span (mm) | Safe UDL (kg/m²) | Allowable Deflection (mm) | Typical Actual Deflection (mm) |
|---|---|---|---|
| 800 mm | 620 kg/m² | 4 mm | 2.9 mm |
| 900 mm | 540 kg/m² | 4.5 mm | 3.6 mm |
| 1000 mm | 490 kg/m² | 5 mm | 4.3 mm |
Industries & Use Cases
Our Machine Moulded & Pultruded Gratings solutions are trusted across diverse demanding sectors:
Walkways and platforms in chemical plants
Trench and drain covers
Stair treads and landings
Cooling tower decks
Offshore and coastal platforms
Water and wastewater treatment plant walkways
Food processing plant grating where hygiene matters
The GPPL Edge
Why leading manufacturing, chemical, and infrastructure firms partner with us:
Non-conductive — safe around electrical equipment
Anti-skid surface — safer than metal grating in wet conditions
Fire-retardant grades meeting ASTM E-84 Class I
Half the weight of equivalent steel grating
No painting or galvanizing required — zero maintenance
Resistant to over 100 chemicals — unlike steel
Frequently Asked Questions
Answers to common queries regarding design, sizing, compliance, and deployment.
What is the difference between moulded and pultruded FRP gratings?
Moulded grating has bi-directional strength and absorbs impact well — ideal for walkways and platforms. Pultruded grating has higher unidirectional strength for longer spans and heavier loads. We supply both.
Are FRP gratings fire-retardant?
Yes, we offer FR-grade gratings meeting ASTM E-84 Class I (flame spread index ≤25). Standard grade is also self-extinguishing.
Can FRP grating replace steel grating 1:1?
Yes, FRP grating is available in standard thicknesses and panel sizes that allow direct 1:1 replacement of steel. The lower weight means installation is often much faster.
Interested in Machine Moulded & Pultruded Gratings?
Our engineers can design and manufacture a custom solution tailored to your plant's specific chemical composition, temperature, and space requirements.