25mm GRP Riser Grating
25mm GRP riser grating is typically specified where service riser spans are shorter and access requirements are limited. As a lightweight moulded mesh panel, it provides slip and corrosion resistance while allowing accurate on-site cutting for M&E service penetrations.
This thickness is commonly used in smaller riser voids or retrofit projects where reduced system depth and easier handling are beneficial.
Typical Uses for 25mm GRP Riser Grating
- Smaller service riser voids with shorter spans
- Low-load access areas with infrequent foot traffic
- Residential and light commercial riser applications
- Retrofit installations where ease of handling is important
25mm vs 38mm and 50mm (When to Specify)
25mm panels are specified where lightweight handling and reduced overall system depth are priorities. For larger spans, increased load requirements, or more frequent access, 38mm or 50mm panel thicknesses are typically recommended.
Technical Performance Characteristics
The following material properties apply to standard 25mm moulded GRP mesh panels used in service riser installations.
- Voltage breakdown: 18 kV/mm (ASTM D149)
- Density (specific gravity): 2100 kg/m³ (ISO 9001)
- Thermal expansion factor: 13 × 10⁻⁶ mm/mm (ISO 9001)
- Water absorption: 0.45% over 24 hours (ASTM D570)
- Operating temperature range: -100°C to +200°C
- Flammability resistance: Class 2
- Frost resistance: No effect (DD CEN/TS 772-22:2006)
- Weatherability: Pass (MOAT 22)
- Slip resistance: 1.04 CoF (BS 4592-0)
Frequently Asked Questions About 25mm GRP Riser Grating
25mm GRP riser grating is typically specified where service riser spans are shorter and load requirements are limited. It is commonly used in smaller voids, residential riser applications, and retrofit projects where reduced panel depth and easier handling are important.
25mm moulded GRP mesh grating typically features 31x38mm mesh spacing, providing safe access while allowing service penetrations to be formed accurately on site.
Yes. 25mm GRP riser panels can be cut using standard power tools to accommodate M&E service penetrations without compromising corrosion resistance or structural integrity.
Yes. Standard moulded panels feature an integral gritted anti-slip surface, achieving a high coefficient of friction suitable for service riser environments.
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