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As a rule of thumb, in order for the upper terrace wall to not cause loading on the lower terrace wall, the minium distance between the wall terraces must be at least equal to twice the height of the lower wall. A concrete block retaining wall is the perfect solution to control erosion, to eliminate a hard-to-mow slope, to add a planting bed, or to level an ideal patio area. The Versa-Lok brand retaining wall system we installed uses nylon pins to align and secure horizontal rows of 80-lb. The primary function of a retaining wall is to support the soils behind it and any loads or weight above. What is important to consider is that the upper terrace wall can put pressure on the lower terrace if the walls are to close together.
It took a day to rip out the old, collapsing retaining wall, to dig farther into the hill to provide room for the backfill gravel and to help unload materials.

Depending on the height and location of your wall, there may be structural, drainage and setback (the distance from wall to property line) considerations. Bongiorno's Contracting installs retaining wall to manage slopes on roadways and parking lots.
Multiple terraced walls in close proximity to each other, can have structual stability issues related to the lower walls not having the capacity to carry the loads developed by the upper walls. Cap blocks can be positioned with a slight overhang or backset, or set flush with the wall face. Once the first row is installed, pack native soil to grade level on both sides of this course to anchor the wall in place. To maintain wall strength, offset the vertical joints of the row you're installing at least 4 in.

These steps range from using special reinforcement fabric to installing a series of terraces rather than one tall wall. Retaining walls solve major site problems, and should be designed and built for a minimum service life of 50 years.

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  • 09.01.2015, admin

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