430 x 280mm Grade A Double-Triangular Surface Box Cover

Name: 430 x 280mm Grade A Double-Triangular Surface Box Cover
Brand: Clark Drain
SKU: CD 842
Availability:  InStock

Clear Opening: 430mm x 280mm
External Dimensions: 530mm x 380mm x 100mm

Heavy duty ductile iron double-triangular surface box cover for utility valve chambers in highways, estate roads and pedestrian areas.

Grade A loading with a non-rock twin lid design, providing stable seating and practical access for external service chambers.

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SKU:CD 842

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430 x 280mm Grade A Double-Triangular Surface Box Cover

Description

This 430 x 280mm surface box cover is designed for underground utility access chambers where a larger rectangular opening is required for valves, controls or service equipment. It is commonly specified in highways, estate roads, paved service areas and other external utility installations.

The double-triangular lid arrangement provides two lifting sections rather than one large single lid. This can improve handling during maintenance while helping maintain a stable non-rock seating in service.

Manufactured from spheroidal graphite iron, this unit is intended for locations where repeated traffic loading, impact resistance and long service life are required. The black coated finish provides temporary protection during storage and installation.

This model is supplied as a standard blank lid, with badging available on request for clearer utility identification. Marked covers can help maintenance teams locate the correct chamber faster on site.

It should not be specified for forklifts or solid wheel vehicle traffic. Selecting the correct cover for the loading environment helps reduce movement and premature wear.

Key Features

Grade A heavy duty loading for trafficked external areas

430 x 280mm clear opening suits larger utility chambers

Double-triangular lid design for sectional lifting access

Non-rock seating improves lid stability in service

Ductile iron construction for strength and durability

Integral lifting key holes for maintenance access

Black coated finish for supply and installation protection

Material Composition

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

Product Specifications

Product type: Double-triangular surface box cover
Suitable location: External
Clear opening: 430mm x 280mm
Overall frame size: 530mm x 380mm
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: Not stated
Sandards: 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 430 x 280mm size refer to?

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

Why choose a double-triangular lid?

It provides two lifting sections, which can be easier to handle than one larger lid and helps maintain stable seating.

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.

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.

430 x 280mm Grade A Double-Triangular Surface Box Cover