Installation Instructions

CLIFTON STRAIGHT
Step 1 - Preparation for Grid
The area behind the wall on the grid layer needs
to be level with the top of the block (after com-
paction) and compacted to 95% of the Standard
Proctor density (ASTM D698).
BASIC GEOGRID REINFORCEMENT
Step 2 - Grid Placement
Place the grid as close to the face of the wall
without exposing it after successive placement of
blocks. Ensure the grid is placed with the strength
direction perpendicular to the wall. Remember,
bidirectional grids (2×T) are the same strength in
both directions and can be rolled out parallel on
straight walls. Check grid manufacturer specifica-
tions for proper grid placement instructions. (3×T
is undirectional).
Step 3 - Preparation for Backfill
Place the next course of block. Pull the grid back
and stake it so it is taut and free of wrinkles.
Step 4 - Backfill and Compact
Place ¾" to 1" clean aggregate (crushed rock)
within the cores and a minimum of 12" behind
the blocks. Also, place and compact backfill on
the grid in lifts no greater than 3 to 6 inches at a
time depending on the rating of your compaction
equipment. When possible, it is recommended
that the backfill be deposited directly behind the
wall and pushed to the end of the grid to ensure
that it remains taut and wrinkle-free.
Step 5 – Install Additional Courses
Repeat steps 2, 3 & 4 to complete wall to height
required, installing additional layers of grid where
needed.