50mm GRP Riser Grating
50mm GRP riser grating is specified for service riser voids requiring increased load capacity and extended span performance.
As a deep moulded mesh panel, it provides superior structural strength while maintaining slip resistance, corrosion resistance, and long-term durability within multi-storey installations.
This thickness is typically selected where higher access frequency, heavier loading, or larger unsupported spans are anticipated.
Typical Uses for 50mm GRP Riser Grating
- Large service riser voids with extended spans
- Projects with higher loading requirements
- Frequent access during installation and maintenance
- Commercial and industrial multi-storey buildings
- Situations requiring enhanced structural rigidity
50mm vs 38mm and 25mm (When to Specify)
50mm panels are typically specified where structural demands exceed the capabilities of 38mm panels.
For standard riser installations with moderate loading, 38mm may be sufficient.
For smaller voids or limited access, 25mm panels may be appropriate.
50mm thickness is recommended where increased span, loading performance, or access frequency is critical.
Technical Performance Characteristics
The following material properties apply to standard 50mm thick moulded GRP mesh panels used in service riser installations.
- Voltage breakdown 18kV/mm (ASTM D149)
- Density 2100 kg/m³ (ISO 9001)
- Thermal expansion factor 13 × 10⁻⁶ mm/mm (ISO 9001)
- Water absorption rate 0.45% / 24 hrs (ASTM D570)
- Operating temperature −100°C to +200°C
- Flammability resistance Class 2
- Frost resistance No Effect
- Slip resistance 1.04 CoF (BS 4592-0)
Frequently Asked Questions About 50mm GRP Riser Grating
50mm GRP riser grating is typically specified where increased load capacity or extended unsupported spans are required within service riser voids. It is commonly selected for larger installations or projects with higher structural demands.
Yes. The increased panel depth of 50mm provides greater structural rigidity and load performance compared to 38mm thickness, making it suitable for more demanding applications.
50mm panels are often used in commercial and industrial multi-storey buildings where riser spans are larger, access frequency is higher, or loading conditions exceed standard installations.
Yes. 50mm moulded GRP riser panels can be cut on site to accommodate mechanical and electrical (M&E) service penetrations using appropriate tools and installation methods.
Yes. 50mm GRP panels are designed for long-term use in service riser environments and provide corrosion resistance, slip resistance, and structural durability when properly installed.
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