Connect with an expertInterlocking Concrete Units
Resist water's erosive nature with professional interlocking concrete solutions such as A-Jacks® and Shorejax™.
Civil engineers, landscape architects, and construction professionals across the nation rely on Ferguson Waterworks for expert geo and stormwater solutions. When a project involves highly erosive forces, consider our hard armor and shoreline protection products. From concrete canvas to articulated concrete blocks, our comprehensive inventory is ready to stand up to any erosion and sediment control application. Contact your local Ferguson Waterworks expert today and experience quality service, competitive prices, and fast turnarounds.
A-Jacks® Concrete Hard Armor
These units interlock into a matrix to both dissipate energy and resist the erosive forces of water. As a result of extensive modeling and with a long history of use, A-Jacks are suited for the most stringent design scenarios. For example, shoreline wave protection, toe stabilization, energy dissipation, and scour protection at dam spillways. In addition, other Concrete Hard Armor applications include scour hole mitigation in rivers, lakes, and streams, and the protection of critical bridge substructures.
What are the key components of A-Jacks Concrete Hard Armor?
- The two-component design offers economical transport and easy on-site assembly
- Hand-place or set in bundles using heavy equipment
- Meet FHWA HEC-23 design guidelines for scour countermeasures
SHOREJAX™ Interlocking Concrete Units
ShoreJax interlocking concrete armor units have two identical concrete halves. When interlocked, they create a concrete matrix. Fasten 48” ShoreJax halves with a 3/8” galvanized, threaded rod and nut tightened to the specified torque. Each ShoreJax unit has a centralized core with three arms extending equidistantly. Once each half-unit is properly interlocked, a completed ShoreJax unit exhibits six equal extensions placed 90 degrees from the four adjacent arms.
How do you place ShoreJax interlocking concrete units to form a cluster?
Upon placement, each unit is supported by the adjacent concrete arms. As a result, the adjacent ShoreJax units can nest. Multiple nested units are referred to as a cluster. When nesting ShoreJax units to make a cluster, the center-to-center spacing between units should be 19.2” – 24”. Then, per the manufacturer’s recommendation, place and securely fasten approved cabling around the cluster’s midsection.
To note, deploy all clusters with an 8” minimum spacing. The design engineer determines the final spacing and placement.
Once the desired cluster configuration is complete, each resulting cluster shall be cabled in the field. Qualified personnel shall complete all cabling utilizing a minimum of 27mm polyester cable. Cabling aids the unit’s mechanical interlock as well as helps alleviate potential toe scouring.
Can ShoreJax provide shoreline protection?
Yes! ShoreJax resists displacement due to imposed tractive forces and wave loads. This includes the necessary strength to withstand both lateral displacement and vertical uplift. Furthermore, like most hard armor solutions, they will not suffer loss of function due to chemical degradation, UV degradation, biological degradation, vandalism, or aging throughout their intended design life.
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