This heavy‑duty D400 Octo Frame manhole cover is fully certified to BS EN 124:2015 Class D400, supporting up to 400 kN (40 tonnes) of wheel load for highways, urban streets, and car parks. Its octagonal (“Octo”) ductile‑iron frame surrounds a Ø 600 mm clear opening, enabling easy access for maintenance tools while minimizing excavation. The hinged cover features a self‑engaging slam lock that automatically secures upon closure and a 90° safety block to prevent accidental drops, significantly enhancing operator safety.

Overview

The D400 Octo Frame cover meets the rigorous requirements of BS EN 124:2015 Group 4, with a certified load capacity of 400 kN (40 tonnes) for trafficked areas. Its compact octagonal frame footprint (Ø 850 × 850 mm nominal) simplifies installation in constrained urban environments. The hinged design—with a slam‑lock system—automatically engages when the cover is closed, and an integral spring bar locks it at 90°, preventing unintentional closure during maintenance work.

Key Features

• BS EN 124:2015 Class D400 Certification: Verified to sustain static and dynamic wheel loads up to 400 kN (40 t) per EN 124 Group 4 standards.

• Octo Frame Design: Unique octagonal frame disperses loads evenly, reducing point stresses on surrounding substrates.

• Ø 600 mm Clear Opening: Standard-sized opening for compatibility with common inspection tools and equipment.

• Hinged Cover with Slam Lock: Self‑engaging slam lock secures cover automatically on closure, eliminating the risk of unsecured covers.

• 90° Safety Block: Cover locks in the open position at 90° via an integrated latch, preventing accidental drops and ensuring safe access.

• Ductile Iron Construction: EN GJS‑400‑15 spheroidal graphite cast iron offers high tensile strength and excellent impact resistance.

• Anti‑Slip Surface: Raised chequered pattern exceeds PSRV 70 standards for superior traction in wet or oily conditions.

• EPDM Gasket Seal: Continuous neoprene or EPDM seal minimizes noise, odours, and water ingress for environmental protection.

• Optional Security Bolting: Retrofit cam locks or tamper‑resistant bolts available to deter theft and unauthorized access.

• Custom Branding & Badging: Incorporate local authority crests, logos, or numbering for clear asset identification and traceability.

Technical Specifications

Benefits for End Users

Durability and longevity are assured: the ductile‑iron construction resists corrosion and deformation, with an expected service life exceeding 20 years even under heavy traffic. The slam lock and safety block reduce maintenance risks and liability by preventing unexpected cover movement. An anti‑slip surface ensures safe pedestrian and vehicular passage, while the gasket seal minimizes noise and odour for urban environments.

Installation & Maintenance

The drop‑in Octo Frame self‑aligns in a prepared recess for a fast, accurate, and flush installation. No special tools are required for locking—the slam lock engages automatically—further simplifying field operations. Routine maintenance involves quick inspections of the hinge, latch, and gasket, typically completed in minutes to minimize downtime.

Compliance & Quality Assurance

Manufactured in ISO 9001‑certified foundries and rigorously tested by UKAS‑accredited laboratories for load, slip, and fatigue performance. CE‑marked and BSI Kitemark certified where applicable, it meets or exceeds all relevant European and national highway standards.