450mm Dia Pedestrian Duty Round to Square Cover & Frame

Product Description

Secure the access point to your inspection chamber or underground drainage neatly and safely with this 450mm Dia Pedestrian Duty Round to Square Cover & Frame. This unit is designed where you want a square surface appearance over a round 450mm diameter opening — ideal for driveways, paths, patios, or domestic areas where aesthetics and durability matter.

Made from polypropylene (PP), the cover and frame are built to withstand pedestrian or vehicle-lite loads up to 3.5 tonnes (≈ 35 kN), with a solid top and a locking mechanism to ensure security and to reduce nuisance movement. The frame depth is about 80mm, with an overall frame size of approximately 560mm × 560mm (square), and a round clear opening of 450mm. The overall depth including locating ring is approx 133.5mm. These measurements help ensure the box fits correctly and the lid sits flush once installed.

Features include a slip-resistant tread pattern on the lid, dual locking (cover to frame, frame to chamber), and extended frame lips to help with leveling to surrounding surfaces. The locking cover helps reduce the risk of unauthorised access or lifting, which can improve safety and durability.

Key Features

• Clear round opening: 450mm diameter (fits standard 450mm chamber risers)

• Overall frame size: ~560mm × 560mm square; frame depth ~80mm; full depth ~133.5mm including locating ring

• Material: Polypropylene – lightweight yet durable for underground/surface conditions

• Load rating: 3.5 tonnes (≈ 35 kN) – suitable for domestic driveway / pedestrian traffic areas

• Locking mechanism: Dual locking (lid to frame, frame to chamber) to secure cover in place

• Slip-resistant top tread pattern for safety in wet or outdoor environments

Benefits

• Secure & Safe: Locking cover prevents unwanted displacement, reducing trip hazards and access issues.

• Neat Finish: Square frame with round opening integrates well with paving, concrete, or surrounding surfaces; helps the cover sit flush.

• Material Strength: Polypropylene construction offers good resistance to moisture, soil pressure, UV exposure, and underground conditions.

• Durability Under Load: Rated to 3.5T, so it handles domestic vehicles, occasional loads, foot traffic reliably.

• Low maintenance: Secure fit, slip-resistant surface, and durable material mean less movement, less noise, and less need for frequent replacing.

For more drainage fittings, see here.