Description
The DU330 1830x680x100mm D400 ductile iron solid top manhole cover is a heavy-duty triple-leaf access cover designed for large underground service chambers where safe access and high load capacity are essential. Manufactured from high-strength spheroidal graphite cast iron, it complies with BS EN124-2:2015, carries BSI Kitemark certification, and meets the requirements of CD534 for demanding infrastructure projects.
Its generous 1830mm x 680mm clear opening makes it particularly suitable for large utility chambers, cable pits and infrastructure projects requiring wide maintenance access. The three-leaf design allows safer and more practical access than a comparable single-piece cover, while the SmartGrip® anti-slip surface and three-point suspension system provide excellent stability under repeated heavy traffic loading.
Designed for long-term durability, the DU330 is ideal for carriageways, industrial developments, utility infrastructure and civil engineering projects where reliable heavy-duty access is required.
Key Features
- D400 load rating tested to 400kN (40 tonnes)
- Triple-leaf design for safer access
- 1830 x 680mm clear opening
- 100mm deep heavy-duty frame
- Manufactured from high-strength ductile iron
- SmartGrip® anti-slip surface technology
- Three-point suspension for non-rock performance
- Black coated finish
- BSI Kitemark certified
- Manufactured to BS EN124-2:2015
- Complies with CD534, BS7903 and Manual for Contract Highway Works (Series 500)
- Optional locking, vented and badged versions available.
Typical Applications
- Large cable pits
- Electrical cable chambers
- Utility chambers
- Electricity substations
- Telecom infrastructure
- Fibre optic networks
- Carriageways
- Hard shoulders
- Industrial estates
- Commercial developments
- Civil engineering projects
- Infrastructure maintenance access
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.
Returns are subject to a restocking fee and haulage (consumer cost), which will be deducted from your refund.
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.
By completing your order, you acknowledge and accept these delivery and return terms.
- Product Code: DU330
- Load Rating: D400 (Group 4)
- Clear Opening: 1830 x 680mm
- Overall Frame Size: 1980 x 830mm
- Frame Depth: 100mm
- Material: Ductile Iron (Spheroidal Graphite Cast Iron)
- Surface Finish: Black Coated
- Surface Pattern: SmartGrip® Anti-Slip Technology
- Certification: BSI Kitemark
- Standard: BS EN124-2:2015
- Load Test: 400kN (40 Tonne)
- Suspension System: Three Point Suspension
- Complies With: CD534, BS7903 and Manual for Contract Highway Works (Series 500)
- Optional Extras: Locking, Vented and Badged versions available.
What size chamber does an 1830×680 manhole cover fit?
The DU330 is designed for chambers with a 1830mm x 680mm clear opening. Always measure the internal chamber opening rather than the external brickwork or surround to ensure the correct fit.
Why choose a triple-leaf manhole cover?
A triple-leaf design provides safer and more practical access to large underground chambers by allowing individual sections to be lifted independently. This makes inspection and maintenance easier than lifting a single large cover while maintaining excellent stability under traffic loading.
Is this manhole cover suitable for carriageways?
Yes. The DU330 is manufactured to BS EN124-2:2015, carries BSI Kitemark certification, complies with the requirements of CD534, and is suitable for carriageways, hard shoulders and other areas subjected to regular heavy vehicle traffic. Always ensure the specification meets the requirements of your project or highway authority.
Can this manhole cover be used for large cable pits?
Yes. The DU330 is commonly specified for large cable pits, utility chambers, electrical infrastructure, telecom installations and civil engineering projects where a wide clear opening and heavy-duty D400 performance are required.
Is the DU330 compliant with BS EN124-2:2015?
Yes. The DU330 is manufactured in accordance with BS EN124-2:2015, carries BSI Kitemark certification, and meets the requirements of CD534, providing confidence in its performance for demanding infrastructure applications.
Can this manhole cover be supplied with locking or vented options?
Yes. The DU330 can be supplied with optional locking, vented and badged configurations to suit different project requirements.
What happens if I order the wrong size?
Large manhole covers are subject to restocking and haulage charges if returned. If you’re unsure which cover you require, contact our team with your chamber dimensions before ordering and we’ll be happy to confirm the correct product.
How heavy is this cover?
The DU330 is a large-format triple-leaf ductile iron manhole cover designed for heavy-duty applications. Due to its size and weight, appropriate lifting equipment or a two-person lift is recommended, and safe manual handling procedures should always be followed.
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