Installation Instructions

CLIFTON STRAIGHT
Tiered Denver and Clifton walls offer a visually pleasing and less obtrusive alternative to conventional wall
construction. On sites that provide sufficient land area for this application, these walls are typically de-
signed with green space between the tiers.
Walls perform independently and may not need engineering when the distance between gravity walls is
at least two times the height of the lower wall, and the height of the upper wall is equal to or less than the
height of the lower wall (known as the 2 to 1 rule). Walls that must be evaluated by an engineer are any
walls needing geogrid reinforcement. These include walls closer than two times the height of the lower
wall, walls with more than two terraces, and terraced walls with any structures above. Terraced walls that
do not perform independently based on the 2 to 1 rule listed above must also be evaluated for global
stability, and the lower wall must be designed to resist the load of the upper wall.
TIERED WALLS
24”
Cap Block
Clifton Block
6º
X
1
Cap Block
Clifton Block
4" Ø Drain Tile
(Elev. Varies)
4" Ø Drain Tile (Elev. Varies)
Other Layers
2
nd
Layer
1
st
Layer
12" of Free Draining Aggregate
4" Ø Drain Tile (Elev. Varies)
6º
6º
Cap Block
Clifton Block
X
1
Varies
Finished Grade
6" Min. Compacted Granular Base Leveling Pad
6"