Frequently Asked Questions
What are D400 manhole covers used for?
D400 manhole covers are designed to withstand heavy traffic loads and are suitable for use in areas subject to vehicular traffic, like highways, commercial premises, and industrial zones.
Their robust construction ensures they can handle the weight of heavy vehicles, including lorries, buses, and other large machinery, making them ideal for high-traffic areas where durability and strength are critical. D400 covers are also engineered to provide a secure and stable surface under extreme conditions, including heavy rain or frost.
Their high load-bearing capacity and resilience make them a reliable choice for maintaining safety and functionality in demanding environments.
For further details and guidance on selecting the appropriate manhole cover for your needs, you can contact Cotterill Civils for expert advice.
What materials are D400 manhole covers made from?
D400 manhole covers from Cotterill Civils, including the D400 lid, are primarily made from high-strength materials like ductile iron. Ductile iron is selected for its exceptional load-bearing capacity and is ideal for withstanding the pressures and impacts associated with heavy traffic.
It is highly resistant to deformation, cracking, and corrosion, which ensures long-lasting durability even under harsh environmental conditions. This material is also known for its excellent defence against impact and fatigue, reducing the need for frequent maintenance and replacements.
Ductile iron's reliability in handling heavy loads and its resilience against wear make it the preferred choice for demanding applications in high-traffic areas.
How do I select the right D400 cover for my application?
To select the right D400 manhole cover, consider the following factors:
- Load requirements: Verify that the cover’s D400 load rating aligns with the type and volume of traffic it will encounter, ensuring it can support heavy vehicles like trucks and buses without failure.
- Size and shape: Confirm that the D400 cover and frame fit the exact dimensions of the manhole or access point. Proper sizing is crucial for preventing potential safety hazards and ensuring a secure, stable cover.
- Material: Ductile iron is known for its durability and ability to handle harsh environmental conditions and heavy loads effectively.
- Design and safety features: Evaluate the need for additional features like anti-theft designs, which prevent unauthorised removal, and non-slip surfaces, which enhance safety under wet or icy conditions.
What is a D400 recessed cover?
A D400 recessed cover is a specialised type of manhole cover designed with a built-in recessed area that allows for additional materials, such as asphalt or decorative paving, to be installed.
This feature ensures that the cover sits slightly below the surrounding surface, creating a flush and aesthetically integrated finish. The D400 designation indicates that the cover is rated to support heavy traffic loads, including trucks and buses, making it suitable for high-traffic areas.
Constructed from durable materials like ductile iron, D400 recessed covers combine strength with a seamless appearance. If you want to know any more information, contact us today and we’ll get back to you as soon as possible.