Description
The 675x675x150mm D400 Highways ductile iron manhole cover (MDD6767DT15) is a heavy-duty double triangular access cover specifically designed for highway use and areas of heavy traffic. Rated D400 to BS EN124:2015, Kitemarked and stated by the manufacturer as CD534/HA104 compliant, it provides a highway-specification solution where a 675 × 675mm clear opening and deeper 150mm frame are required.
Featuring a 675 × 675mm clear opening, 815 × 815mm overall frame size and heavy-duty 150mm frame depth, the MDD6767DT15 provides substantial access to underground chambers while meeting the requirements of demanding trafficked environments.
The cover incorporates a double triangular lift-out configuration and is specified by Castings Services as compatible with all mainstream D400 composite chamber systems. This makes it particularly suitable for highway utility chambers, telecommunications infrastructure, cable chambers and other service access points situated within areas subject to road-going traffic.
675×675 D400 Manhole Covers
675 × 675mm is an established manhole cover and chamber opening size used across highway, utility and civil engineering applications. The MDD6767DT15 is suitable for both new installations and replacement projects where a 675 × 675mm clear opening, highway-grade D400 specification and 150mm deep frame are required.
When replacing an existing 675 × 675 D400 manhole cover, always check the clear opening, overall frame dimensions and frame depth. Products from different manufacturers can vary even where they share the same nominal clear opening.
This particular product has an 815 × 815mm overall frame and 150mm frame depth, so these dimensions should be checked against the existing installation or project specification before ordering.
Suitable for highways, carriageways, utility chambers, cable chambers, telecommunications infrastructure, composite chamber systems and other heavily trafficked civil engineering applications, the MDD6767DT15 provides a highway-grade 675 × 675mm access solution where a deeper 150mm frame is specified.
Looking for other options? Browse our full range of D400 Highways Manhole Covers or explore our 675×675 Manhole Covers to compare alternative load classes, manufacturers, frame depths and specifications.
Need a shallower frame? View our 675x675x100mm D400 Highways Manhole Cover (MDD6767DT10) for the equivalent highway-specification cover with a 100mm frame depth.
Key Features
- D400 heavy-duty load classification
- Designed for highway use and areas of heavy traffic
- 675 × 675mm clear opening
- 815 × 815mm overall frame size
- Heavy-duty 150mm frame depth
- Double triangular lift-out configuration
- BS EN124:2015 Kitemarked
- CD534/HA104 compliant
- Compatible with mainstream D400 composite chamber systems
- Suitable for new installations and replacement projects
- Bespoke badging available, including FW/SW
- Optional sealing plate available
- 100mm Highways alternative – MDD6767DT10
Typical Applications
- Highways
- Carriageways
- Areas of heavy traffic
- Highway utility chambers
- Utility infrastructure
- Cable chambers
- Telecommunications chambers
- Communications infrastructure
- Composite chamber systems
- Highway drainage infrastructure
- Commercial access roads
- Industrial infrastructure
- Civil engineering projects
- New highway installations
- Replacement 675 × 675 D400 covers requiring a 150mm frame
Plus, enjoy fast delivery – your order can be dispatched within 48 hours, ensuring your project stays on schedule without delays.
All manhole covers, gully covers, and frames are supplied through an external supplier. Delivery charges will be calculated in your cart at checkout. Due to the size and weight of these items, deliveries are typically made using an artic vehicle.
Please review all product specifications before placing an order. If you require assistance selecting the correct product, our team is available on 03338803558Â or info@drainageandcivilsdirect.co.uk to provide professional guidance.
- Product Reference: MDD6767DT15
- Product Type: Double Triangular Ductile Iron Highway Manhole Cover
- Load Classification: D400
- Clear Opening: 675 × 675mm
- Overall Frame Size: 815 × 815mm
- Frame Depth: 150mm
- Cover Configuration: Double Triangular – Lift Out
- Standard: BS EN124:2015
- Certification: Kitemarked
- Highway Compliance: CD534/HA104 Compliant
- Chamber Compatibility: Mainstream D400 Composite Chamber Systems
- Optional Extras: Bespoke Badges (FW/SW etc.) and Sealing Plate
- 100mm Alternative: MDD6767DT10
- Delivery: Fast dispatch within 48 hour
What size chamber does this 675x675x150mm manhole cover fit?
The MDD6767DT15 is designed for a 675 × 675mm clear opening. It has an 815 × 815mm overall frame size and 150mm frame depth. For replacement installations, check all three dimensions against the existing chamber and frame before ordering.
Is this 675×675 D400 manhole cover suitable for highways?
Yes. This product is specifically designed for highway use and areas of heavy traffic. It is D400, BS EN124:2015 Kitemarked and stated by Castings Services as CD534/HA104 compliant.
Is the MDD6767DT15 CD534 compliant?
Yes. The manufacturer’s datasheet specifically states that this D400 range is CD534/HA104 compliant. This is an important distinction from simply selecting a cover because it carries a D400 load classification.
What is the difference between the 150mm and 100mm versions?
Both products have a 675 × 675mm clear opening, 815 × 815mm overall frame, D400 classification and highway specification. The MDD6767DT15 has a 150mm frame depth, while the MDD6767DT10 has a 100mm frame depth. Select the appropriate depth according to the project specification or existing installation.
Why would I choose the 150mm deep frame?
Choose the 150mm version where the project specification or existing installation requires a deeper frame. A 150mm frame should not automatically be assumed necessary simply because the installation is within a highway; always check the required frame depth.
What does double triangular lift-out mean?
The MDD6767DT15 uses a double triangular lift-out configuration, dividing the access cover into triangular sections rather than using one large single-piece cover. This provides access to the chamber through individually removable cover sections.
Can this cover be used with composite chamber systems?
Yes. Castings Services states that the range is compatible for use with mainstream D400 composite chamber systems, making it suitable for highway utility, telecommunications and other service chamber installations.
Will this replace my existing 675×675 D400 manhole cover?
Potentially, but 675 × 675mm refers to the clear opening and does not guarantee that every manufacturer’s cover and frame will be dimensionally interchangeable. This model has an 815 × 815mm overall frame and 150mm frame depth, so these dimensions should be checked against the existing installation.
Can the cover be supplied with bespoke badging or a sealing plate?
Yes. The manufacturer’s listed options include bespoke badging, such as FW/SW identification, and an optional sealing plate. Availability and lead time should be confirmed if either is required for a particular project.
What happens if I order the wrong size or frame depth?
Heavy ductile iron covers can incur significant return haulage and restocking costs. Before ordering, check the 675 × 675mm clear opening, 815 × 815mm overall frame and 150mm frame depth. If you’re unsure, send us your existing dimensions or project specification and we can help check suitability.
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