Tiered WallsTerraced walls will give a yard a more aesthetic look.

Designing Tiered Allan Block Retaining Walls

BBuuiillddiinngg WWaallllssooff DDiissttiinnccttiioonn

Gravity Wall

Walls that rely on theirown strength to holdup the soil behind them.

Reinforced Walls

Walls that need addedreinforcement to holdup the soil behind them.

ReinforcedTiered Wall

Terracingbrings life to a

hillside.

allanblock.com

Terracing, as a design element, can be traced

back to ancient Roman gardens.

GravityTiered Wall

Tiered Walls

Allan Block Corporation, 5300 Edina Industrial Blvd., Edina, MN Phone 952-835-5309, Fax 952-835-0013,US Pat. #4,909,010 & #5,484,236 Canadian Pat. #2,012,286 & #2,133,675 Patents Worldwide 0203 DOC. #L0504

Allan Block Tiered WallsTerraced walls can create more usable space, tame slopes, build raised gar-dens and can add interest to your landscape.

A series of flat terraces is much more suitable for landscaping than a largeuniform steep slope. In many situations, terracing is the only means by whichland can be made suitable for gardening or landscaping. Such a situation iscommon for small residential plots that lie entirely within a sloped land area.

Terracing can prevent erosion by shortening the long slope into a series ofshorter, more level steps, which allows heavy rains to soak into the soil ratherthan run off and cause erosion.

Steep hillsides, because of their nature, areoften times very hard to manage. Terracingcan improve the safety of a slope whileadding an aesthetic and economic value toa property.

ReinforcementAlthough terracing improves the look of the landscape, it is important to con-sider the pressure of the upper wall on the lower wall. If the distancebetween the walls is less than two times the height of the lower wall, theupper wall could be putting pressure on the lower wall and reinforcement maybe necessary. Contact the Allan Block Engineering Department or your localdealer for design assistance if necessary.

D D

H

H2

H1

Gravity WallsNo Pressure from upper wallNo Reinforcement Needed

Distance (D) between the walls is two timesthe height of the bottom wall (H1).

Reinforced WallsPressure from upper wallReinforcement May Be Needed

Distance (D) between the walls is less thantwo times the height of the bottom wall (H).

ReinforcementGrid