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MagnumStone™ is a large wet-cast interlocking concrete block system providing an aesthetically pleasing, robust design, fast and cost-effective retaining solution.

MagnumStone is a unique hollow core mass block system, manufactured here in New Zealand, designed with the asset owner, engineer and contractor in mind. The MagnumStone system allows for robust design options to meet many different conditions and finished facing requirements. An extremely quick and easy installation process effectively removes a lot of the manual labour found with other retaining systems.


MagnumStone is the retaining wall system that ticks all the boxes:

  • Quick and easy installation
  • Engineered system with up to 100 year design life
  • Easy to transport
  • Versatile hollow core design allowing drainage at the face
  • Minimises manual labour
  • Less concrete than solid block systems
  • Cost effective
  • Flexible design options

MagnumStone™ is a Registered Trademark of CornerStone® registered in Canada.

MagnumStone Unit Specification

Design Options

Frequently Asked Questions

The MagnumStone extenders are used only for a gravity wall where extra mass is required to make the wall stable. They nest into the back of the block to provide extra support. Extenders are not required for geogrid reinforced walls.

Currently we are stocking the LedgerStone finish which has an attractive natural rock appearance. Other face details are available on a project specific basis.

MagnumStone can be designed as a reinforced wall with StrataGrid reinforcement, or as a mass gravity structure without grid. Ask Cirtex which option is best for your site.

Cirtex can provide indicative design charts for initial project costing and can assist an engineer with detailed analysis. MagnumStone uses tried and trusted international design methodology.

Yes the CornerStone design package is available to all design engineers. To download a copy go to

Benefits & Features





MS15LSN MagnumStone Block Standard N/A
MS11LSN MagnumStone Block Top N/A
MS17LSN MagnumStone Block Base N/A
MS22LSN MagnumStone Half-Block Standard N/A
MS19LSN MagnumStone Half-Block Top N/A
MS21LSN MagnumStone Half-Block Base N/A
MS49LSN MagnumStone Block End Kit N/A




MS20LSN MagnumStone Half-Block End Kit N/A
MS25 MagnumStone Block Extender Small N/A
MS24 MagnumStone Block Extender Large N/A
60219 SGU80 0.6m x 200m (120m2)
60217 SGU120 0.6m x 200m (120m2)
60218 SGU150 0.6m x 200m (120m2)

Send us a message, we'll be in touch.

Please note:

Cirtex stocks the Triton S22 Chambers. When using the calculator, please ensure you change 'chamber selection' to S-22.

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