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Legendary size

Hercules™ 400kn manhole covers

Our Hercules range has been designed as the ideal solution when a very large manhole cover is required for a 400kN Group 4 environment.

The products have been designed and manufactured to meet the requirements of BS EN 124:2015. Additionally, the covers include features designed to provide both greater operator safety and operational longevity.

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Hercules manhole cover render

Large chambers are commonly covered with steel access covers. But when the chamber is located in a Group 4 trafficked environment, steel rarely provides the solution. That’s where Hercules comes in, providing a durable, ductile iron solution to clear openings up to 1.2m x 1.2m.

Manufactured for highways ironwork projects in 400kN Group 4 environments, it has been specially designed to meet rigorous specification standards. The range includes a number of features benefitting the contractor, including:

  • The double triangular covers are indexed to ensure correct orientation when fitting
  • The cover has a small and secure window, allowing for easy inspection, preventing the need to remove covers
  • A threaded lifting eye can be secured to allow for mechanical lifting - making it easier and safer to move and inspect
  • Anti-flex covers prevent seating wear, eliminating excessive noise and catastrophic failure
  • Enlarged frame corners help to dissipate load, minimising bearing pressures
  • Suits large chambers - up to 1.2m clear opening
  • UKAS-accredited third-party certification (70+PSVR tested)

Features

  • Independently tested by a UKAS-accredited laboratory to achieve a PSRV value of 70+ on the chequer surface.

    PSRV tested

  • I-beam structure increases rigidity and reduces seat wear for a longer service life.

    Universal beam icon

  • Directs forces vertically to convert traffic loads into mortar-compatible compression forces.

    Cover support geometry

  • Enlarged corners spread loads evenly across the foundation, enhancing reliability and lifespan.

    Enlarged frame corners

  • Indexed corners ensure correct orientation and alignment first time, every time.

    Indexed corners

  •  The inspection window allows a safe and easy view into the chamber without needing to remove the covers.

    Inspection window

Square or rectangular manhole covers

Stock code Range Clear opening
(mm)		 Overall frame
(mm)		 Frame depth
(mm)		 Options My Wrekin Downloads
DMT0D6/1212/4 Hercules 1,200 x 1,200 1,385 x 1,385 150

Available options and accessories

Options

Accessories

View full details for available options and accessories
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