The VERSA-LOK® Harmony™ retaining wall system uses Standard and Cobble wall units to create designs limited only by your imagination. Combine the units in countless ways to create a variety of natural-looking designs. At half the width and the same height as Standard units, Cobble units can be set randomly among the Standard units or the two types of unit can be set in a repeating ratio.


Harmony Retaining Wall System
Width (face)
6" (152.4mm)
12" (304.8mm)
Face Area
.75" per course
7.1 degrees
# Versa-Tuff Pins
2 per unit
Max Unreinforced Height
4 ft*
Max Geogrid Reinforced Height
50+ ft

*The maximum stable, unreinforced VERSA-LOK wall height in best conditions, may be lower depending on soil, site and loading conditions (including terraces). Taller walls need geogrid soil reinforcement, designed by a qualified engineer. Check your local building code requirements. Please contact your supplier or VERSA-LOK representative for assistance.

Additional available literature


Technical Bulletin #1-Shorelines, Waterways, and Retention Pond Protection

Guidelines for using VERSA-LOK Retaining Wall Systems in a water environment. Foundation strength, scour, hydrostatic build up, and fines migration are addressed. 

Technical Bulletin #2-Stairs

How to build steps using VERSA-LOK retaining wall units.

Technical Bulletin #3-Curves and Corners

Written instructions, drawings, and photos help explain how to build various radiuses of inside and outside curves and a wide range of angles for inside and outside corners using the VERSA-LOK standard unit. Suggestions for proper placement of geogrids are also presented.

Technical Bulletin #4-Caps

Tips on capping straight and curved walls. Includes directions for using caps as treads when installing VERSA-LOK steps.

Technical Bulletin #5-Base Installation

The components of a VERSA-LOK retaining wall base are explained, as is proper leveling pad construction.

Technical Bulletin #6-Freestanding Walls, Columns, and Vertical Walls

Design options for building vertical retaining walls, columns, and freestanding walls are presented. Pinning and capping instructions are included.

Technical Bulletin #7-Tiered Walls

Considerations for construction of tiered retaining walls, including spacing requirements, are addressed.

Technical Bulletin #8-Fences, Railings, and Traffic Barriers

Discusses top-of-the-wall barriers including fences, guide rails, concrete traffic barriers, and stair rails.

VERSA-LOK Harmony Information Sheet

This information sheet presents an overview of the VERSA-LOK Harmony retaining wall system.

Contact information
(123) 456-7890
(123) 456-7890