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General Construction Products |
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VERSA-LOK retaining wall system INSTALLATION:
The installation steps below are for:
VERSA-LOK Standard Retaining Wall Systems ONLY.
Important: Walls that support heavy loads or
exceed four feet in height require special soil reinforcement and often
professionally engineered designs. Please consult a qualified engineer if
unsure about any construction, site or soil conditions. Also be sure to
check local building codes before wall construction or design.
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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 |
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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. |
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Drainage
aggregate and backfill
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. |
Step 4
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Install Successive Courses
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
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Geosynthetic soil
reinforcement
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. |
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Install Caps
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. |
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