Common Gravity Blocks
Regularly used Redi-Rock blocks for gravity wall applications.
28 in (710 mm) Solid Retaining
28 in (710 mm) Top
41 in (1030 mm) Solid Retaining
60 in (1520 mm) Solid Retaining
"Redi-Rock just is a set-and-go structural solution. It's an obvious choice for a project like this."
– Sam Carter Miller Wall Company (Denver, Colorado)
Get To Know Gravity
Gravity blocks allow walls up to 21 ft (6.4 m) without reinforcement, depending on site conditions.
5° standard setback; specialty batter options up to 16 in (406 mm) available by producer.
Available half-block sizes expand design capabilities and improve finish detailing in complex wall sections.
Strength From Sheer Block Mass
The massive weight of Redi-Rock’s gravity blocks helps the wall resist earth pressures through mass and setback design, making gravity wall systems ideal for projects with tight sites and shorter schedules.
Engineered to Deliver Your Vision
Redi-Rock gravity blocks don’t just provide strength; they offer serious design flexibility. Gravity blocks are designed so you can create everything from sweeping roadway and shoreline curves to crisp corners and clean transitions, accommodating complex infrastructure layouts.
This flexibility allows engineers, contractors, and property owners to adapt the design to the demands of their project rather than forcing the project to fit the wall.
The Patented Technology Powering Redi-Rock
Knob and Groove Functionality Instead of relying on complicated alignment methods prone to errors, the top of each massive block features knobs that pair with grooves cast into the bottom, guiding placement and creating a consistent setback as the wall rises. This allows gravity blocks to stack securely under their own weight, creating stable alignment without additional connections. Think giant Legos.
Built-In Green Space
Redi-Rock gravity retaining walls aren’t just stout and sturdy. They also look great, thanks to blocks that finish off your high-profile project.
Redi-Rock Planter Blocks make it easy to add grass and other softscapes to your retaining wall design. Integrated planting pockets soften the appearance of large structural walls while supporting erosion control, enhancing visual appeal, and expanding green space.
Common Gravity Block Specifications
28 in (710 mm) Middle Solid Cobblestone/Limestone Specs Block Weight: 1610 lb (730 kg) Block Volume: 11.28 ft³ (0.319 m³) Center of Gravity: 13.9 in (354 mm)
Kingstone/Ledgestone Specs Block Weight: 1540 lb (700 kg) Block Volume: 10.78 ft³ (0.305 m³) Center of Gravity: 13.4 in (340 mm)
28 in (710 mm) Top Cobblestone/Limestone Specs Block Weight: 1230 lb (557 kg) Block Volume: 8.57 ft³ (0.243 m³) Center of Gravity: 14.9 in (378 mm)
Kingstone/Ledgestone Specs Block Weight: 1160 lb (530 kg) Block Volume: 8.07 ft³ (0.229 m³) Center of Gravity: 14.2 in (362 mm)
41 in (1030 mm) Middle Solid Cobblestone/Limestone Specs Block Weight: 2310 lb (1050 kg) Block Volume: 16.14 ft³ (0.457 m³) Center of Gravity: 20.4 in (518 mm)
Kingstone/Ledgestone Specs Block Weight: 2240 lb (1020 kg) Block Volume: 15.65 ft³ (0.443 m³) Center of Gravity: 19.8 in (504 mm)
60 in (1520 mm) Middle Solid Cobblestone/Limestone Specs Block Weight: 3290 lb (1490 kg) Block Volume: 23.00 ft³ (0.651 m³) Center of Gravity: 31.0 in (786 mm)
Kingstone/Ledgestone Specs Block Weight: 3220 lb (1460 kg) Block Volume: 22.49 ft³ (0.637 m³) Center of Gravity: 30.4 in (772 mm)
Yup, we have even more gravity blocks.
XL Hollow-Core
XL Hollow-Core gravity blocks can elevate your walls height beyond 20 ft (6.1 m) where standard gravity blocks can't. If you thought our common gravity blocks were giant Legos, wait until you see XL Hollow-Core blocks.
41 in (1030 mm) Hollow-Core
Redi-Rock’s 41-inch Hollow-Core block delivers the proven strength and speed of the Redi-Rock system in a lighter, more efficient format. Helping build taller, longer-lasting retaining walls with less concrete, easier handling, and a clean finished look.
Gravity Block FAQs
What applications are Redi-Rock gravity blocks used in?
Redi-Rock gravity blocks are utilized in any project type with a limited footprint and minimal available space behind the wall. This typically includes retaining walls, roadway infrastructure, bridge approaches, shoreline stabilization, commercial development, rail projects, erosion control, and more.
What are Redi-Rock gravity wall blocks made of?
Redi-Rock gravity wall blocks are made from 4,000 PSI (27.6MPa) precast concrete designed for durability, structural performance, and long service life in demanding retaining wall applications.
How are Redi-Rock gravity blocks produced?
Redi-Rock gravity wall blocks are produced using a precast concrete process where high-strength concrete is poured into steel molds and vibration-cured for uniform density and durability.
How much does a Redi-Rock gravity block weigh?
Most Redi-Rock gravity blocks weigh more than a ton, with exact weight varying by style and configuration. This mass is a key factor in the stability of gravity wall system designs.
Are all Redi-Rock gravity blocks the same size?
No. The system includes a variety of block sizes and shapes to accommodate different wall geometries, corner conditions, and design requirements, including hollow core options.
What equipment is needed to install Redi-Rock gravity blocks?
Due to their size and weight, gravity blocks are typically installed using standard construction equipment such as excavators or loaders with appropriate lifting attachments.
What are the advantages of machine-set blocks like Redi-Rock gravity blocks?
Machine-set blocks help speed installation, reduce labor demands, and improve consistency during construction. Their large size allows contractors to build substantial wall areas more quickly than with smaller hand-laid block systems.