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Retaining walls are useful in many situations.

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Retaining Wall Guide
This chart is designed to help estimate the number of Versa-Lok standard units you'll need for your specific project.
Matching cap units are available to attractively finish your VERSA-LOK wall. Capes come in two styles -A and B. Both cap styles are 3-5/8" tall and 14" wide at the face, but their sides are tapered differently. Alternate A and B caps for straight walls. Use A caps for outside curves and B caps for inside curves.

Important Notice: Maximum height for an unreinforced Versa-Lok wall is four feet. Individual site, soil and loading conditions (including terraces) may limit unreinforced wall height to less than four feet. Taller walls require geosynthetic soil reinforcement and engineering assistance. Please contact your local supplier or Versa-Lok representative if unsure about any site, soil, height or local construction requirements.

Installation
Step 1 - Leveling Pad Preparation
VERSA-LOK walls should be placed on a leveling pad of well-compacted gravel, crushed stone or coarse sand approximately 6" thick and 24" wide. The first course of VERSA-LOK units should be embedded below grade approximately 1/10th of the exposed wall height. Excavate to lines and grades you've established for your wall, allowing for the leveling pad and unit embedment. Place and compact leveling pad material. It may be helpful to add a thin layer of sand to create a uniform, level pad.
Step 2 - Install Base Course
Place VERSA-LOK units on prepared leveling pad. As you proceed, level each unit front to back, side to side, and with adjacent units. Leveling is critical at this stage, so take your time! Align straight wall sections using a string line or by sighting down the grooves on unit tops. If your wall has a corner, begin at the corner and work out from there.
Step 3 - Drainage aggregate and backfill
Step 4 - Install Successive Courses
First, place drainage aggregate (3/4-inch clear, free-draining, angular gravel) between and directly behind units at a minimum thickness of 12 inches. Drainage aggregate keeps water pressure from building up behind the face of the wall. Next, place soil backfill directly behind drainage aggregate in layers no thicker than six inches. Compact the backfill, making sure it is neither too wet nor too dry. Generally, hand-operated vibratory-plate compactors can be used to achieve adequate compaction of granular soils - even on larger projects.
Stack units one course at a time. Set units back 3/4" and insert two VERSA-TUFF pins per unit in front holes of units so they fall into the rear slots of the units beneath. Tap pins with another pin and a mallet to properly set them. Place and compact drainage aggregate behind each course as it is completed.
Step 5 - Geosynthetic soil reinforcement
Step 6 - Install Caps
If your wall is higher than four feet or shoulders significant loads, you will need to install geosynthetic soil reinforcement. As each course is laid, place soil reinforcement horizontally on top of compacted backfill and VERSA-LOK units. Geosynthetic layers should be placed about one inch from the front of VERSA-LOK units. Keep in mind, geosynthetics are usually stronger in one direction. For correct orientation, follow the geosynthetic manufacturer's directions carefully.
After completing the top course of your wall, install VERSA-LOK caps, either with a slight overhang (recommended), set back or flush with the wall face. Use VERSA-LOK concrete adhesive to secure cap units to the wall.