High-Strength Aluminum Manhole Cover for Road

Product Overview

Traditional cast iron covers weigh 50-80kg, increasing worker injury risks and requiring specialized lifting equipment. These aluminum covers—crafted from 6061-T6 alloy—weigh 45% less while exceeding load-bearing standards for urban and highway use. Engineered to withstand repeated vehicle impacts, chemical exposure, and temperature fluctuations, they eliminate rust-related jamming and reduce lifecycle costs by 60% compared to steel equivalents over 20 years.

Product Features

Superior Load Capacity: Certified to EN 124 D400 standard, supporting axial loads up to 40 tons—suitable for heavy traffic areas including highways, ports, and industrial zones. The 6061-T6 alloy provides a compressive strength of 276 MPa, outperforming gray cast iron in impact resistance.

Anti-Theft Design: Integral locking mechanisms (patented) with unique key access prevent unauthorized removal, reducing replacement costs associated with stolen covers by 90%. The non-magnetic properties deter scrap metal theft.

Corrosion Resistance: A hard anodized finish (15-20μm thick) combined with chromate conversion coating achieves 2000 hours of salt spray resistance (ASTM B117), eliminating rust-related seizing common in steel covers. Suitable for coastal and de-icing salt environments.

Safety Features: Anti-slip surface pattern (coefficient of friction ≥0.8) reduces pedestrian slip hazards, while tamper-proof hinge pins prevent accidental dislodgment during vehicle impact. The lightweight design (15-25kg) minimizes worker lifting injuries.

Product Applications

Urban Roadways: Replace steel covers in city centers and residential areas to reduce maintenance crew fatigue and enable faster emergency access to underground utilities. The reduced weight allows single-worker installation.

Highway Infrastructure: D400-rated covers withstand heavy truck traffic on interstates and highways, maintaining structural integrity through repeated axle impacts (tested to 100,000 cycles of 40-ton load).

Industrial Zones: Factories and logistics hubs benefit from chemical resistance to oils, solvents, and deicing agents, preventing degradation in harsh working environments.

Coastal Areas: The enhanced corrosion resistance makes these covers ideal for boardwalks, marinas, and coastal roads where salt spray accelerates steel degradation.

FAQ

Q: How does the weight compare to traditional manhole covers?

A: At 15-25kg, our aluminum covers are 45-60% lighter than cast iron equivalents (50-80kg). This reduces lifting injuries by 70% and eliminates the need for mechanical lifting equipment in most cases.

Q: Can the locking mechanism be integrated with smart monitoring systems?

A: Yes, the design accommodates RFID tags and IoT sensors for remote monitoring of cover status (open/closed), enabling utilities to detect unauthorized access or tampering in real-time.

Q: What is the expected lifespan in high-traffic areas?

A: Under normal highway conditions, the covers have a projected lifespan of 25+ years—double that of steel covers which typically require replacement every 10-12 years due to rust and wear.

Q: Are they compatible with existing manhole frames?

A: Yes, we offer custom sizing to match standard frame dimensions (600mm-1200mm diameter) with minimal modification. Retrofit kits include adapter plates for non-standard installations.