Why GRP Trench & Draw Pit Cover Systems Matter
Unprotected trenches and draw pits are high-risk environments. Without adequate coverage, they create fall hazards, structural vulnerability, and non-compliance, putting lives and operations at risk. Our GRP cover systems are engineered to perform under load, resist chemicals and deliver lasting structural integrity, ensuring compliance and safety across demanding facility environments. Without engineered containment solutions:
What is the GRP Trench Tunnel Fire and Blast Containment Wall?
A GRP trench & draw pit cover system is an engineered glass-reinforced plastic solution designed to withstand heavy loads and harsh environments, protecting trench & pit openings while maintaining structural integrity & operational safety.
Load-Bearing Strength
Engineered to support pedestrian, vehicle, and equipment loads without deformation or failure.
Chemical & Corrosion Resistance
Resists oils, chemicals and moisture, outperforming standard metal covers in aggressive environments.
Thermal Stability
Maintains structural performance across a wide temperature range without warping or weakening.
Anti-Slip Surface
Provides a safe, slip-resistant walking surface to reduce the risk of falls in industrial and commercial settings.
Low Maintenance & long Service Life
GRP composition eliminates corrosion, reducing maintenance needs and the total cost of ownership.
How the System Protects Your Facility
Invicta ANARA’s GRP trench & draw pit cover systems integrate three connected capabilities – engineered design, certified manufacturing, and professional installation – working together to reduce risk across the project lifecycle. Covers are designed, tested, and installed to a unified quality standard, ensuring full traceability from material selection through to onsite performance.
GRP covers are rated for pedestrian, forklift, and vehicular loads, fully compliant with relevant British and European standards for industrial access covers.
Engineered to withstand exposure to oils, acids, and industrial chemicals without degrading, delivering consistent performance in aggressive facility environments.
Anti-slip surfaces meet safety standards for industrial walkways, reducing fall risk in high-traffic or wet conditions.
GRP maintains its form and structural integrity across temperature variations, ensuring covers fit reliably and perform consistently over their service life.
Lightweight panels reduce manual handling risk and enable fast, flexible installation, including retrofitting into existing trench and pit configurations.
Performance & Technical Specifications
Fire & Thermal Protection
EI 120–240 min fire resistance (standard & high-heat variants).
Compatible with HC, RWS, and tunnel fire curves.
Prevents concrete spalling and protects steel reinforcement under extreme heat.
Smoke & Gas Containment
Fully sealed system blocks smoke, toxic gases, and hot fire-gases.
Enables safer evacuation and rescue paths.
No hazardous post-event debris or collapse.
Blast & Impact Resistance
Engineered to withstand high overpressure events.
Maintains structural integrity after combined fire + blast scenarios.
No hazardous post-event debris or collapse.
Materials & Construction
Non-combustible, moisture- and corrosion-resistant composite system.
Lightweight vs concrete; fast installation and easier maintenance.
Modular panels fit new builds, retrofits, and complex tunnel geometries.
Advantages Over ConventionalTunnel Protection Methods
Traditional Methods
Concrete or plain-lining risk of spalling, reinforcement failure, structural collapse under fire/heat.
Spray-applied fireproofing / fire boards / mortars may require frequent maintenance, have limited durability, may degrade upon moisture or impact
Passive fire barriers only (fire partitions, boards) limited or no blast, impact, debris, or smoke/gas protection.
Heavy & bulky steel/concrete barriers are difficult, high-cost and have long downtime for retrofit/repair.
SECURA Tunnel Wall Benefits
The composite barrier prevents spalling, maintains integrity, protects reinforcement & structure under extreme fire or blast.
Durable, moisture-resistant, corrosion-proof composite system — long lifecycle, low maintenance, high resilience.
Multi-hazard protection (fire, blast, impact, smoke/gas, thermal, acoustic), enabling comprehensive risk mitigation.
Lightweight modular panels — faster installation, retrofit friendly, minimal disruption to tunnel operations.
Sectors We Serve
Our solutions are designed for sectors where infrastructure reliability, safety, and long-term performance are critical.
Energy & Utilities
Energy & Utilities
- Power & Grid Infrastructure
- Energy & Process Facilities
- Onshore & Offshore Assets
- Renewable Energy Infrastructure
Industrial
Industrial
- Chemical & Process Plants
- Manufacturing & Heavy Industry
- Hazardous Material storage facilities
- Automotive & Industrial Campuses
Transportation
Transportation
- Airports & Aviation Facilities
- Metro, Rail & Mass Transit Systems
- Roads, Highways & Vehicular Tunnels
- Ports, Shipyards & Marine Transport Infrastructure
Defence
Defence
- Defence & Command Facilities
- Critical National Infrastructure (CNI)
- Secure & Hardened Assets
- Border, Coastal & Strategic Installations
Infrastructure
Infrastructure
- Data Centres & Digital Infrastructure
- Public Venues & Stadia
- Cultural & Institutional Buildings
- Government & Diplomatic Facilities
Commercial/Mixed-Use
Commercial/Mixed-Use
- Hospitality & Leisure
- Financial & Commercial Buildings
- Mixed-Use Landmark Developments
