Alpenstein® Retaining Wall System

Alpenstein offers the ease and stability of segmental retaining wall construction, combined with the beauty and versatility of a plantable wall system.

Designers can create curved or straight walls to accommodate almost any terrain. The open-unit design allows for root penetration and the natural infiltration of water and also makes the unit easy to handle during installation.

Once planted with vines, flowers, or other greenery, Alpenstein integrates itself into the natural contours of the landscape.

Alpenstein® Technical Details

Installation

Alpenstein can accommodate a variety of slope inclinations up to 70 degrees. It can be utilized for most walls under 3.5 ft high without geogrid, while higher walls and tiered construction can be built with the aid of geogrid reinforcement. A qualified soil engineer should be consulted for walls over 6 ft high or when site and soil conditions are questionable.

Alpenstein is made by blending iron oxide pigments with a cement-rich concrete mixture. Utilizing pressure and vibration, specialize equipment mold this mixture into high-density segmental retaining wall units with exceptional strength and durability. Alpenstein meets or exceeds the industry standards of ASTM C1372.

ALPENSTEIN 12

  • Width: 16 1/2"
  • Block Length: 12"
  • Block Height: 6 3/4"
  • Height of Front Shield: 8 1/4"
  • Width of Front Shield: 16 1/2"
  • Unit Weight: 58 lb

ALPENSTEIN 20

  • Width: 16 1/2"
  • Block Length: 20"
  • Block Height: 6 3/4"
  • Height of Front Shield: 8 1/4"
  • Width of Front Shield: 16 1/2"
  • Unit Weight: 79 lb

STANDARD DESIGN PROCEDURE

The design details established for the construction of reinforced soil retaining walls are based upon generally accepted soil parameters for low plastic silty clay (CL), clayey silt (ML), sandy silt (ML), and granular soils where the soil fines do not exceed 50 percent by weight and the liquid limit does not exceed 50. A qualified engineer shall review the site and soil conditions to determine if the actual conditions match those used in this design. All soil parameters used in the design are under long-term, well-drained strength conditions.

The drawings and specifications address geo-reinforcement layout and drainage requirements for horizontal and sloping backfill for single walls, and two-tier walls with horizontal backfill. Each case includes a surcharge of 100 pounds per square foot (psf) above the wall. The following parameters and requirements were used in the development of the designs depicted hereon:

Reinforced wall fill

  • Total Unit Weight, pcf: 125
  • Cohesion, psf: 0
  • Friction Angle: 28
  • Hydrostatic Pressure, psf: 0

Retained fill

  • Total Unit Weight, pcf: 125
  • Cohesion, psf: 0
  • Friction Angle: 28
  • Hydrostatic Pressure, psf: 0

Foundation soil

  • Total Unit Weight, pcf: 125
  • Cohesion, psf: 0
  • Friction Angle: 28
  • Hydrostatic Pressure, psf: 0

Internal Stability of Wall

  • Minimum factor of safety for geogrid strength: 1.5
  • Minimum factor of safety for geogrid pullout: 1.5
  • Wall-backfill interaction coefficient: 0.8
  • Wall-foundation soil interaction coefficient: 0.8
  • Percent coverage of geogrids: 100
  • Wall batter: 20°

External Stability of Wall

  • Factor of safety for sliding considerations: 1.5
  • Factor of safety for overturning considerations: 2.0

External Loading

  • Surcharge load = 100 psf at top of wall or 3:1 slope above wall

Bearing Conditions

Bearing soils shall be suitable for a maximum allowable net bearing pressure for the wall of at least 165*H (where H is in feet and the result is in psf) on natural soil or compacted fill. The allowable net bearing pressure must include a factor of safety of at least 3 against a general bearing capacity failure.

Alpenstein® Planting Reference

Current building practices and unique project sites often force design professionals to rely on retaining walls to create additional outdoor living space. Segmental (concrete block) retaining wall systems are a popular, cost effective, frequently used wall system option.

The Alpenstein Retaining Wall System offers design professionals, property owners and wall installation contractors the advantage of creating a Vertical Garden space within a stabilized hillside.

Alpenstein plantable concrete wall units are unique in that a cavity is contained within each block, and the open body frame construction permits the placement of topsoil within the wall facing and allows roots from vegetation to grow deep. The high front shield of the unit provides an attractive finish to the wall, but more importantly prevents the topsoil within the wall facing from erosion.

Landscape design professionals should consider the following when developing an Alpenstein Vertical Garden:

  • Location of wall on the project site
  • Existing environmental conditions
  • Wall face direction
  • Irrigation system required
  • Specific unit fill soil type
  • Plant type, growth habits, flowering periods, color and sun / shade exposure

For your convenience we have included several landscape planting design options based on a variety of site conditions. The ultimate success and creativity of the Alpenstein Vertical Garden is dependent upon the plant material specified.

Plant Type Plant Name Growth Type
Cascading     Erect
Flowers
Spring    Summer     Fall
Foliage 
Color
Wall Facing
N/E      S/W
Exposure
Shade    Sun
Soil
Moist   Dry
Flower
Color
Annual Impatiens X                 X             X               Green & Bronze X              X             X          Wh, Pk, Rd, Or, Pu
Annual Petunia - Wave & Maddness X                                  X            X Green             X              X X          Wh, Pk, Rd, Pu
Annual Sweet Potato Vine X                 Purple & Lime Grn.              X              X  X       X
Annual Vinca Vine X                  X Variegated X          X X          X X       X
Vine Virginia Creeper X              X  X Green & Var. X          X X          X X       X
Vine Trumpet Creeper X              X  X Green X          X X          X X       X Yellow & Orange
Vine Winter Creeper X              X  Green X          X  X          X X       X
Vine Clematis X                                  X            X Green X          X              X X          Wh, Pk, Rd, Pu
Perennial Coreopsis 'Moonbeam' X                                  X            X Green X          X              X X       X Yellow
Perennial Aster x frikartii X                                  X            X Green X          X              X X       X Pink & Purple
Perennial Dianthus 'Maiden Pinks' X                  X                              Green & Grey X          X X          X           X White, Pink, Red
Perennial Geranium sanguineum X              X  X Green X          X X              X          Pink & Blue
Perennial Lambs Ear X                  X             X               Silver Grey X          X              X          X Pink
Perennial Sedum (all species) X              X                  X            X Grey, Green, Red              X              X          X Pink, Red, Yellow
Shrubs Cotoneaster X              X  X                              Green X          X X          X X       X White
Shrubs Itea (Sweetspire) X              X   X Green X          X             X X       X White
Shrubs Juniper (Rug & Procumbens) X                  Green & Blue/Grey X          X             X X       X
Shrubs Spirea (Goldmound & Little Prn) X              X   X Gold & Green             X             X X       X Pink
Shrubs Barberry (Crimson Pygmy) X                  X                              Burgundy X          X             X X       X Pink

Midwest Block & Brick is one of the largest and most efficient masonry and landscape companies in the United States.

Locations

Missouri
  • 12901 St. Charles Rock Road Bridgeton, MO 63044
    (314) 291-3200
  • 201 Rock Industrial Drive, Bridgeton, MO 63044
    (314) 291-3200
  • 2525 State Hwy 177 Cape Girardeau, MO 63701
    (573) 334-1835
  • 3115 Paris Road Columbia, MO 65202
    (573) 445-9484
  • 2203 E. McCarty Street Jefferson City, MO 65101
    (573) 635-7119
  • 4101 East 12th Terrace Kansas City, MO 64127
    (816) 241-5197
  • 6293 Osage Beach Parkway Osage Beach, MO 65065
    (573) 348-1774
  • 1650 East Atlantic Springfield, MO 65803
    (417) 869-2595
  • 15584 Veterans Memorial Pky Wentzville, MO 63385
    (636) 332-9784
Arkansas
  • 1589 Electric Avenue Springdale, AR 72764
    (479) 750-7887
Illinois
  • 600 State Street Quincy, IL 62301
    (217) 223-2633
  • 8605 State Route 3 Waterloo, IL 62298
    (618) 939-7600
Kentucky
  • 1001 Estelle Street Paducah, KY 42001
    (270) 442-3585
Oklahoma
  • 5519 East 15th Street Tulsa, OK 74112
    (918) 836-9151
Tennessee
  • 200 Pierce Road Oakland, TN 38060
    (901) 465-6611

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