Cast Iron 350x500mm Grated Manhole Cover, Heavy-Duty Drainage

350x500mm Grated Manhole Cover

The Cast Iron Grating Cover serves as a high-strength surface drainage solution for managing stormwater in pedestrian and light vehicular areas. This heavy-duty metal casting provides a reliable intake point for secondary sewer systems. The unit features a slotted design to facilitate high-volume water flow while preventing large debris from entering the pipework.

Built for the Job

This drainage component is manufactured for civil engineering and residential site work where surface water runoff requires immediate diversion. The casting process ensures structural integrity under compressive loads. Contractors typically install this unit in driveways, parking lots, and walkways. The heavy weight of the iron prevents displacement during high-flow events or light traffic movement. The frame is designed to sit flush with concrete or asphalt surfaces to maintain a level grade. The parallel bar configuration is optimized for hydraulic efficiency without compromising the structural safety of the lid. This specific size is a standard requirement for intermediate catch basins in urban drainage layouts.

• Installation in residential driveways for managing surface runoff.

• Placement in commercial parking areas for efficient stormwater collection.

• Integration into municipal pedestrian walkways and plazas.

Product Highlights

Corrosion Resistant Finish

The entire casting is treated with a black bituminous coating to prevent oxidation in wet environments.

Structural Specifications

• High-density grey iron construction for superior compressive strength.
• Precision-engineered slot widths to balance drainage speed and safety.

Technical Specifications

What’s Included

• 1 x Cast Iron Grated Cover and Frame Assembly

On-Site & Workshop Notes

• Ensure the seating flange is fully supported by a high-strength mortar bed during installation.

• Clean the rebate of the frame before placing the grate to prevent rattling or uneven seating.

• Orient the slots perpendicular to the primary flow of water for maximum collection efficiency.

• Verify that the finished surface level matches the top of the metal grate to prevent trip hazards.