Description
GUIDE PDF
AB Metro Patio Walls Installation – Guidelines and Limitations
Following guidelines contained in our documents and tools, you are able to build a low height retaining wall up to 2 ft. (0.6 m) tall, or a free-standing patio wall up to 3 ft. (1 m) tall. Our simple to use sets of blocks allow you to stack and glue them together to create your desired design. General guidelines require all units to be glued together using a flexible masonry adhesive, such as NP1.
Low Height Retaining Walls
Low height garden and landscape retaining walls can be built up to 4 courses – 2 ft. (0.6 m) tall on a compacted rock base that is a minimum of 6 in. (150 mm) deep and 16 in. (400 mm) wide. The first course of block is buried 3 in. (75 mm) below grade with the cores filled with rock and all courses / blocks glued together. No surcharges or slopes above the wall. Elements installed near retaining walls must be kept a minimum of 3 ft. (1 m) away from the back of the retaining wall. For taller retaining walls, see the AB Metro Classic retaining wall.
AB Metro Retaining Walls

Product Overview, Helpful Design and Layout Videos

Seating Walls
In a similar manner to the layout shown above, you can easily add columns and corners to your AB Metro Seating Wall for added stability. The height for a seating wall is 3 courses – 1.5 ft (450 mm) with a cap on an existing surface, or on a compacted rock base that is a minimum of 6 in. (150 mm) deep. Using corners and columns within the wall will breakup long walls and incorporate added stability. All courses / blocks need to be glued together.
AB Metro Seating Walls
Patio Surround Walls
For free-standing walls above 3 courses – 1.5 ft (450 mm), the maximum distance between columns is 22 ft. 8 in. (6.9 m). Columns can be built on an existing surface or on compacted rock base that is a minimum of 6 in. (150 mm) deep and 4 ft. (1.2 m) wide. The maximum panel height is 6 courses – 3 ft. (1 m) on an existing surface, or on a compacted rock base that is a minimum 6 in. (150 mm) deep and 16 in. (400 mm) wide. All courses / blocks need to be glued together. When a combo retaining wall and patio surround wall is desired, see the AB Metro Classic retaining wall.
Elevation View
- Full retaining wall elevations drawn by entering elevations and stations in a spreadsheet-like form.
- Slopes above the wall can be drawn on the elevation to streamline the cross section design process.
- Easily add or modify stations or elevations when design conditions change.
Plan View
- The plan view can be used to see the true retaining wall footprint on your site including the wall’s setback.
- This is critical in the planning and design phases of construction. An existing plan can be imported into AB Walls 10 to provide an accurate wall layout. This can be done by any CADD program that can create a .DXF file.
Wall Panels
- Like previous versions of AB Walls, the retaining wall elevation is divided into multiple wall panels, each of which has a cross section assigned to it.
Cross Sections
- Geogrid Lengths, Surcharges & Point Loads can all be customized to give an accurate representation of your site.
- Slopes above the wall entered from the elevation or assigned to each cross section independently.
- Static & Seismic Design:
- External Stability – with automated suggestion of design parameters
- Internal Stability – with easily modified geogrid parameters
- Internal Compound Stability (ICS)
- Additional gravity wall options available for each cross section.
DXF Output
- With the click of a button, output your design to a .DXF file that is compatible with most CADD programs. It is layered and to scale, ready to be incorporated into your construction documents.
- Specifications
- General Notes
- Elevation
- Plan
- Cross Sections
- Cross Section Notes
Material Estimates and Proposal Worksheets
- After the wall has been designed in AB Walls 10, the last steps would be to generate a material estimate for the project. This includes all the material required to build the wall:
- retaining wall blocks & caps
- geogrid
- wall rock
- base rock
- infill soil
- drain pipe etc…
- The estimate includes labor and engineering quantities so that all you need to do
is type in prices for a complete retaining wall price.