A Kelly Block is a large, precast interlocking concrete unit commonly used for temporary or permanent construction structures. They are most frequently also known as: 

  • Concrete Lego Blocks: Due to their that allow them to be stacked securely like toy bricks.
  • Kentledge Blocks: 
  • Ballast Blocks: 
  • Counterweight Blocks: 
  • Octoblocks: 
  • Interlocking