Arch-Lock™ - Classic concept. Modern solutions.

Arch Lock system

The Arch-Lock™ system offers a modern approach to achieving the high strength, beauty, and durability of an ancient Roman arch, one of the strongest compression structures known to man.

Using the proprietary interlocking system developed exclusively by Lock-Block Ltd., Arch-Lock™ pre-cast concrete voussoirs achieve unparalleled geometric fit and tolerances, eliminating the need for mortar. Arch Lock system Each Arch-Lock™ concrete piece is pre-cured, allowing for rapid assembly and installation. Combined with our state-of-the-art zipper truck assembly process, this reduces construction time by as much as 90%.

You can build at a fraction of the cost and time required for a comparable conventional reinforced post and beam concrete structure. And with no embedded steel to limit the service life, the structure will last indefinitely.

Arch-Lock™ Construction:

  • Is reusable ie: can be dismantled & reassembled.
  • Is seismic resistant and safe.
  • Has an immense load carrying ability.
  • Theoretically, allows you to build a quarter-mile long archway in 24 hours and be immediately functional without a 28 day curing cycle.

Customized to meet your needs

Lock-Block Ltd. also offers:

Arch Lock system
  • Custom-engineered 1/25th scale 3-D models of your specific project needs (Using 3-D printing technology).
  • Custom casting of Arch-Lock™ pieces to meet your project needs.
  • Custom colouring and casting of Arch-Lock™ pieces with your company name and/or logo.

The Arch-Lock™ system can be used to construct arches and domes for use as hurricane/tornado shelters, wine cellars, highway and railway over/underpasses, tunnels, culverts, ditches, and creek crossings.


  • Assembles quickly.
  • Reduces construction time by as much as 90%.
  • Ideal as hurricane/tornado shelters.
  • Great for wine cellars.
  • Seismic resistant and safe.
  • Has an immense load carrying ability
  • Is reusable ie: can be dismantled & reassembled
  • No embedded steel means long service life
  • Customizable with your personal logo
  • Roman structures of this type have been in service for 3,000 years

Rod Lock system

The Arch-Lock™ system has benefits which are superior to:

  • Multi-plate steel culverts and vaults
  • Conventional pre-cast concrete bridges and tunnels
  • Structural reinforced concrete bridges
  • Wooden bridges