300 x 300mm Grade A Surface Box Cover

Name: 300 x 300mm Grade A Surface Box Cover
Brand: Clark Drain
SKU: CD 844
Availability:  InStock

Clear Opening: 300mm x 300mm
External Dimensions: 420mm x 420mm x 100mm

Heavy duty ductile iron surface box cover for utility access chambers in highways, estate roads and pedestrian areas.

Grade A loading with a one-piece solid top lid, designed for external valve and service access points where strength and durability are required.

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SKU:CD 844

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300 x 300mm Grade A Surface Box Cover

Description

This 300 x 300mm surface box cover is designed for underground utility access chambers where a square clear opening is required for valves, controls or service equipment. It is commonly installed in highways, estate roads, paved service areas and pedestrian locations.

The one-piece solid top lid provides straightforward access while maintaining a robust seating arrangement under normal service conditions. Integral lifting key holes allow planned maintenance access using suitable lifting keys.

Manufactured from spheroidal graphite iron, this unit is intended for external environments where repeated loading, impact resistance and long service life are expected. The black coating provides temporary protection during storage and installation.

This model is supplied as a standard blank lid, with optional badging available on request where utility identification is needed. Correct service marking can help maintenance teams locate the right chamber quickly.

It should not be specified for forklifts or solid wheel vehicle traffic. Matching the cover to the correct loading conditions helps prevent premature failure and movement in service.

Key Features

Grade A heavy duty loading for trafficked external areas

300 x 300mm clear opening suits square valve chambers

One-piece solid top lid for simple access

Ductile iron construction for strength and durability

Integral lifting key holes for maintenance access

Black coated finish for supply and installation protection

Optional badging available for utility identification

Suitable for highways, estate roads and pedestrian areas

Material Composition

Manufactured from spheroidal graphite iron grade EN-GJS-500-7 to BS EN 1563. This ductile iron material is commonly used for access covers where high strength and resistance to repeated loading are required

Product Specifications

Product type: Solid top surface box cover
Suitable location: External
Clear opening: 300mm x 300mm
Overall frame size: 420mm x 420mm
Frame depth: 100mm
Material: Ductile iron, EN-GJS-500-7
Finish: Black coated finish
Seal type: None
Locking: Non-locking
Load rating: Grade A heavy duty
Lifting method: Lifting key holes
Fixings supplied: None
Weight: 16.5kg
Standards: BS 5834-2, BS EN 124, BS EN 1563

About this collection

Surface Box Covers

Surface box covers are access covers designed to protect and provide access to underground utility valves. They are commonly installed in footpaths, verges and roadways for water, gas and other service connections.

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FAQs

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What does the 300 x 300mm size refer to?

It is the clear opening size, meaning the usable access opening through the frame.

Is this suitable for roads?

Yes. These models are Grade A heavy duty units intended for estate roads, highways and pedestrian areas, subject to project requirements.

Is the lid hinged?

No. This is a removable solid top lid with lifting key holes.

Can it be supplied with utility markings?

Yes. Badging is available on request, depending on project needs.

Is this suitable for forklifts?

No. It should not be used for forklifts or other solid wheel vehicles.

300 x 300mm Grade A Surface Box Cover