Description
The 600x600x150mm D400 Highways ductile iron manhole cover (MDD6060DT15) is a heavy-duty double triangular access cover designed for highway use and areas of heavy traffic. Rated D400, BS EN124:2015 Kitemarked and stated by the manufacturer as CD534/HA104 compliant, it provides a highway-specification solution for one of the UK’s most commonly used access chamber sizes.
Featuring a 600 × 600mm clear opening, 740 × 740mm overall frame size and heavy-duty 150mm frame depth, the MDD6060DT15 combines a widely used chamber opening with a deeper frame for projects and replacement installations where a 150mm depth is specified.
The cover features a double triangular lift-out configuration and is compatible with mainstream D400 composite chamber systems, making it suitable for highway utility chambers, communications infrastructure, cable chambers and other service access points situated within heavily trafficked areas.
A Common 600×600 D400 Manhole Cover Size
600 × 600mm is one of the most commonly specified manhole cover sizes, making this product suitable for both new installations and replacement projects. Unlike a general-purpose D400 cover, the MDD6060DT15 is specifically positioned for highway use and areas of heavy traffic, with stated CD534/HA104 compliance.
When replacing an existing 600 × 600 D400 manhole cover, always check the clear opening, overall frame dimensions and particularly the frame depth. Products described as 600 × 600mm are not necessarily dimensionally interchangeable between manufacturers.
This model has a 740 × 740mm 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, telecommunications infrastructure, cable chambers, composite chamber systems and other heavily trafficked civil engineering applications, the MDD6060DT15 provides a deeper-frame highway-grade option where a 150mm frame is required.
Looking for other options? Browse our full range of D400 Highways Manhole Covers or explore our 600×600 Manhole Covers to compare alternative load classes, manufacturers, frame depths and specifications.
Need a shallower frame? View our 600x600x100mm D400 Highways Manhole Cover (MDD6060DT10) for the equivalent highway-specification cover with a 100mm frame depth.
Looking for a standard D400 option? View our 600x600x100mm D400 Ductile Iron Manhole Cover (DU001) for a general-purpose D400 alternative.
Key Features
- D400 heavy-duty load classification
- Designed for highway use and areas of heavy traffic
- 600 × 600mm clear opening
- 740 × 740mm 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
- Common 600 × 600mm chamber size
- Suitable for new installations and replacement projects
- Bespoke badging options available
- Optional sealing plate available
- 100mm Highways alternative – MDD6060DT10
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 600 × 600 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 03338803558 or info@drainageandcivilsdirect.co.uk to provide professional guidance.
- Product Reference: MDD6060DT15
- Product Type: Double Triangular Ductile Iron Highway Manhole Cover
- Load Classification: D400
- Clear Opening: 600 × 600mm
- Overall Frame Size: 740 × 740mm
- 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 and Sealing Plate
- 100mm Alternative: MDD6060DT10
- Delivery: Fast dispatch within 48 hour
What size chamber does the 600x600x150mm manhole cover fit?
The MDD6060DT15 is designed for a 600 × 600mm clear opening. It has an overall frame size of 740 × 740mm and a 150mm frame depth. For replacement projects, check all three dimensions against the existing chamber and frame before ordering.
Is this 600×600 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 the manufacturer as CD534/HA104 compliant.
Is the MDD6060DT15 CD534 compliant?
Yes. The manufacturer’s datasheet states that this product range is CD534/HA104 compliant, making it particularly relevant where a highway-specific specification is required rather than simply a D400 load classification.
What is the difference between the 150mm and 100mm Highways versions?
Both products provide a 600 × 600mm clear opening, D400 classification and highway specification. The MDD6060DT15 has a 150mm frame depth, while the MDD6060DT10 has a 100mm frame depth. Select the appropriate version according to the project specification or existing installation.
Why choose the 150mm deep frame?
The 150mm version should be selected where the project specification or existing installation requires a deeper 150mm frame. A deeper frame should not automatically be assumed necessary simply because the installation is within a highway, so always check the specified frame depth before ordering.
What is the difference between this and the standard DU001 600×600 D400 manhole cover?
Both products provide a 600 × 600mm clear opening and D400 load classification, but they are positioned for different requirements. The MDD6060DT15 is specifically a Highways product with stated CD534/HA104 compliance and a 150mm frame depth, while the DU001 provides an alternative general-purpose D400 specification with a 100mm frame depth.
What does double triangular lift-out mean?
The MDD6060DT15 uses a double triangular lift-out configuration, dividing the cover into triangular sections rather than using one large single-piece cover. This provides access to the chamber below through individually removable cover sections.
Can this cover be used with composite chamber systems?
Yes. The manufacturer states that this range is compatible with mainstream D400 composite chamber systems, making it suitable for highway utility, telecommunications and other service chamber installations.
Will this replace my existing 600×600 D400 manhole cover?
Potentially, but 600 × 600mm refers to the clear opening and does not mean every 600 × 600mm product is dimensionally interchangeable. This model has a 740 × 740mm overall frame and 150mm frame depth, so these dimensions should be checked against the existing installation.
Can this cover be supplied with bespoke badging or a sealing plate?
Yes. Available options include bespoke badging and an optional sealing plate. If either is required for a particular project, availability and lead time should be confirmed before ordering.
What happens if I order the wrong size or frame depth?
Heavy ductile iron covers can incur return haulage and restocking costs. Before ordering, check the 600 × 600mm clear opening, 740 × 740mm overall frame and 150mm frame depth. If you’re unsure, send us your existing dimensions or project specification and we can help check suitability.
There are no reviews yet.