Description
The 450x450x100mm D400 Highways ductile iron manhole cover (MDD4545DT10) is a compact heavy-duty access cover specifically 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 purpose-designed highway solution where a smaller 450 × 450mm access opening is required.
Featuring a 450 × 450mm clear opening, 595 × 595mm overall frame size and 100mm frame depth, the MDD4545DT10 combines compact dimensions with the performance required for demanding trafficked environments. This makes it particularly useful for smaller highway utility chambers, communications chambers, cable chambers and other service access points located within areas subject to road-going vehicles.
The cover incorporates a double triangular lift-out configuration, providing secure access across the chamber opening. Castings Services also specifies compatibility with all mainstream D400 composite chamber systems, making the product particularly relevant for modern utility and communications chamber installations.
Unlike a standard D400 cover selected primarily on its load classification, this product is specifically positioned within the manufacturer’s highway range. Castings Services states that its D400 covers are suitable for carriageways, hard shoulders and parking areas for road-going vehicles, and lists compliance with CD534, HA104/09, BS7903 and EN124-2 across the range.
Replacement 450×450 D400 Manhole Covers
The 450 × 450mm clear opening is a commonly used smaller access chamber size, making this cover suitable for both new highway installations and replacement projects. However, overall frame dimensions can vary between manufacturers even where the clear opening is described as 450 × 450mm.
This product has a 595 × 595mm overall frame and 100mm frame depth, so when replacing an existing 450 × 450 D400 manhole cover, always check the clear opening, overall frame dimensions and frame depth before ordering. The manufacturer’s drawing also specifically warns that over-frame dimensions may vary.
Suitable for highways, carriageways, utility chambers, telecommunications infrastructure, cable chambers, composite chamber systems and other areas of heavy traffic, the MDD4545DT10 provides a compact highway-grade solution where a smaller D400 access opening is required.
Looking for a general D400 option? View the 450x450x100mm D400 Ductile Iron Manhole Cover (DU079) for an alternative 450 × 450mm D400 specification.
Looking for other options? Browse our full range of D400 Highways Manhole Covers or explore our 450×450 Manhole Covers to compare alternative load classes, manufacturers and specifications.
Key Features
- D400 heavy-duty load classification
- Specifically designed for highway use and areas of heavy traffic
- 450 × 450mm clear opening
- 595 × 595mm overall frame size
- 100mm frame depth
- Compact highway access-cover format
- 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
Typical Applications
- Highways
- Carriageways
- Hard shoulders
- Areas of heavy traffic
- Highway utility chambers
- Smaller utility chambers
- Cable chambers
- Telecommunications chambers
- Street lighting infrastructure
- Communications infrastructure
- Composite chamber systems
- Highway drainage infrastructure
- Commercial access roads
- Civil engineering projects
- New highway installations
- Replacement 450 × 450 D400 covers
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: MDD4545DT10
- Product Type: Ductile Iron Highway Manhole Cover
- Load Classification: D400
- Clear Opening: 450 × 450mm
- Overall Frame Size: 595 × 595mm
- Frame Depth: 100mm
- 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
- Delivery: Fast dispatch within 48 hour
What size chamber does this 450×450 manhole cover fit?
The MDD4545DT10 is designed for a 450 × 450mm clear opening. The cover and frame have an overall size of approximately 595 × 595mm with a 100mm frame depth. When replacing an existing cover, always check both the clear opening and overall frame dimensions before ordering.
Is this 450×450 D400 manhole cover suitable for highways?
Yes. This product is specifically identified by the manufacturer for highway use and areas of heavy traffic. It is D400, BS EN124:2015 Kitemarked and stated as CD534/HA104 compliant, making it part of our dedicated D400 Highways range.
Is the MDD4545DT10 CD534 compliant?
Yes. The manufacturer’s datasheet states that the product is CD534/HA104 compliant. This is an important distinction when comparing it with a general D400 cover where the D400 load classification alone should not automatically be taken to mean compliance with a particular highway specification.
What does double triangular lift-out mean?
The MDD4545DT10 uses a double triangular lift-out cover arrangement. Rather than a single-piece cover, the access cover is divided into triangular sections that can be individually removed to provide access to the chamber below.
Can this cover be used with composite chambers?
Yes. Castings Services states that this product is compatible for use with mainstream D400 composite chamber systems, making it suitable for highway utility, telecommunications and other service chamber installations.
What is the difference between this and a standard 450×450 D400 manhole cover?
Both may carry a D400 load classification, but this MDD4545DT10 is specifically positioned for highway use and areas of heavy traffic and is stated by the manufacturer as CD534/HA104 compliant. This makes it particularly relevant where a highway-specific product specification is required.
Looking for a general D400 option?
View the 450x450x100mm D400 Ductile Iron Manhole Cover (DU079) for an alternative 450 × 450mm D400 specification.
Do you offer other 450×450 D400 highway manhole covers?
Yes. We also offer alternative 450 × 450mm D400 highway manhole covers, including premium manufacturer options. Specifications and overall frame dimensions can differ, so check the individual product requirements before selecting an alternative.
I’d link “450 × 450mm D400 highway manhole covers” to the D400 Highways category, rather than directly mentioning Wrekin in the FAQ. That keeps this page evergreen if your range changes.
Can this manhole cover be supplied with bespoke badging or a sealing plate?
Yes. The manufacturer’s listed options include bespoke badging, including FW/SW identification, together with an optional sealing plate. Availability should be confirmed before ordering if either is required.
Will this replace my existing 450×450 D400 manhole cover?
Potentially, but do not rely on the 450 × 450mm description alone. This refers to the clear opening. Overall frame dimensions can differ between manufacturers, so compare the existing frame with this product’s approximately 595 × 595mm overall frame and 100mm depth before ordering.
What happens if I order the wrong size?
Ductile iron manhole covers can incur return haulage and restocking charges. For replacement projects, check the 450 × 450mm clear opening, overall frame dimensions and 100mm frame depth before ordering. If you’re unsure, send us your chamber dimensions or project specification and we can help check suitability.
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