Positive Connection (PC) Blocks
Regularly used Redi-Rock blocks for reinforced wall applications.
28 in (710 mm) PC Top Block
28 in (710 mm) PC Middle Block
Get To Know Positive Connection
Build reinforced retaining walls over 50 ft (15 m) tall with PC blocks engineered for demanding height and loading conditions.
Proprietary cavity allows a direct mechanical connection between geogrid reinforcement and the block face.
Wet cast composition delivers unparalleled durability and a natural stone-like textured appearance for the long term.
Made for Mechanically Stabilized Earth (MSE) / Reinforced Walls
PC Blocks create a predictable load path from the soil mass to the wall face, providing engineers with greater flexibility in retaining wall design while helping contractors build retaining walls that meet the most demanding project requirements.
Strength Where It Matters Most
PC Blocks eliminate uncertainty by providing a direct mechanical attachment between reinforcement layers and the blocks themselves. The result is a retaining wall system capable of supporting taller walls and heavier loads while maintaining long-term stability.
Positive Connection Block Specifications
28 in (710 mm) Top Positive Connection (PC) Cobblestone/Limestone Specs Block Weight: 1170 lb (530 kg) Block Volume: 8.16 ft³ (0.231 m³) Center of Gravity: 15.3 in (388 mm)
Kingstone/Ledgestone Specs Block Weight: 1100 lb (500 kg) Block Volume: 7.66 ft³ (0.217 m³) Center of Gravity: 14.6 in (372 mm)
28 in (710 mm) Middle Positive Connection (PC) Cobblestone/Limestone Specs Block Weight: 1520 lb (690 kg) Block Volume: 10.62 ft³ (0.301 m³) Center of Gravity: 14.2 in (360 mm)
Kingstone/Ledgestone Specs Block Weight: 1450 lb (660 kg) Block Volume: 10.12 ft³ (0.287 m³) Center of Gravity: 13.6 in (346 mm)
CHECK OUT EVERY BLOCK
The Redi-Rock Block Library
Mechanically Stabilized Earth (MSE) vs. Gravity
Which solution does your project demand?
Positive Connection Block FAQs
How do Positive Connection Blocks connect to geogrid?
The block design incorporates an engineered connection system that securely locks approved geogrid reinforcement to the block face, ensuring a positive connection between the reinforcement and the retaining wall.
Can Positive Connection Blocks be used for transportation projects?
Yes. Positive Connection Blocks are commonly specified for highways, bridge approaches, rail projects, roadway widening, and other transportation infrastructure applications that require reinforced retaining walls.
What types of projects are best suited for Positive Connection Blocks?
Positive Connection Blocks are commonly used for transportation infrastructure, commercial developments, industrial facilities, public works projects, bridge approaches, and other applications that require reinforced retaining walls.
What makes a Positive Connection wall different from a traditional MSE wall?
Traditional MSE walls often rely on friction between blocks and geogrid to transfer loads. Positive Connection Blocks use a direct mechanical connection, creating a more predictable, robust attachment between the reinforcement and wall.
Do Positive Connection Blocks work with all geogrid products?
Positive Connection Blocks are designed to work with approved geogrid reinforcement products. Engineers should verify compatibility and design requirements based on project specifications and local standards.
Can Positive Connection Blocks be combined with other Redi-Rock products?
Yes. Positive Connection Blocks are designed to integrate with other wall solutions within the Redi-Rock system, allowing designers to address varying site conditions while maintaining a consistent appearance throughout the project.
What types of loads can Positive Connection walls support?
Positive Connection walls can be engineered to support a wide range of loading conditions, including roadways, parking areas, rail corridors, structures, and other surcharge loads. Final capacities are determined by project-specific engineering.