Brett Martin 450mm Diameter Secured Plastic Cover For Driveways 35kn

Key Features Summary (Bullet Points)

• Driveway Rated Loading: Engineered to withstand loads up to 35kN (3.5 tonnes / 50kN with concrete plinth support), making it ideal for residential driveways and domestic parking areas.

• Child-Safe & Anti-Tamper: Features a secure screw-down locking lid that prevents accidental opening, unauthorized access, or removal.

• Zero Scrap Value: High-grade polypropylene construction eliminates the risk of site theft common with traditional cast iron covers.

• Corrosion & Weather Resistant: Will not rust, rot, or degrade when exposed to harsh UK weather, soil chemicals, or vehicle tyres.

• Building Regulations Compliant: Fully tested and compliant with UK Building Regulations Part H1 and BS EN 124 / A15 standards.

The Brett Martin 450mm Diameter Secured Plastic Cover and Frame (B6255) is a lightweight, ultra-durable alternative to heavy cast iron manhole covers, engineered specifically for domestic driveways, patios, and residential parking areas.

Manufactured from high-strength, UV-stabilized polypropylene with a reinforced webbed base, this inspection chamber cover offers excellent load-bearing capabilities—tested to handle vehicle wheel loads up to 35kN (and up to 50kN when installed with a suitable concrete plinth).

Safety is built into the design.The lid features a heavy-duty screw-down locking mechanism using stainless steel screws to prevent tampering, accidental displacement, or injury to children and pets.Because it is crafted entirely from heavy-duty plastic, it carries zero scrap metal value—protecting your property against opportunistic theft.

Designed for effortless integration, the frame fits seamlessly onto standard Brett Martin 450mm inspection chamber risers and bases (such as the B5494).

Frequently Asked Questions (FAQ)

Is this plastic cover strong enough for cars to drive over?

Yes. The B6255 is specifically rated for domestic driveway applications with a load rating of 35kN (and up to 50kN / 5 tonnes when bedded on a concrete support plinth), making it fully capable of handling domestic cars, vans, and light commercial vehicles.

Does this cover fit other brands of 450mm inspection chambers?

While it is optimized for seamless push-fit onto Brett Martin 450mm risers and chamber bases, it will also fit most standard 450mm underground drainage chamber risers that comply with BS EN 1401 / BS EN 13476-2 standards.

How is the lid secured to the frame?

The unit comes with corrosion-resistant stainless steel screws that thread directly into the frame.This keeps the cover locked tight to satisfy safety requirements and prevent unauthorized access.

Technical Specifications

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