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CURVED WALL INSTALLATION
RETAINING WALL SYSTEMS
All of Unilock's retaining wall systems have been engineered to work on the basic premise that the mass of the concrete units will counter the force of the existing soils being retained.
To achieve this, units are simply stacked on top of each other using a runner bond pattern. The groove or lip on each of the units interlocks with the units below. This creates a strong connection between the individual units, preventing sliding and bulging of the wall. The Risi Stone Retaining Wall Systems have a patented offset tongue and groove design that ensures that each course is installed at the appropriate set back, further increasing the wall's stability. When the wall has been assembled, the retaining wall system remains flexible. This allows the wall to endure minimal settlement and deflection.
For the construction of wall less than 36" or 1m and where good soil conditions exist, the Basic Wall Installation method should be used. When walls exceed this height consult your local planning department. If poor site conditions exist, obtain professional engineering services.
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CURVED WALLS
Inside Curves-The minimum radius for an inside or concave curve, using Pisa II as an example, is 8' (2.4m). Smaller radii can be achieved but this will require cutting.
The curve is constructed using standard units. The faces of the units must be placed tightly together, but there will be small gaps at the back.
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OUTSIDE CURVES
The minimum radius for an outside or convex curve, using Pisa II and Roman Pisa as an example, is 8' (2.4m). The Pisa II and Roman Pisa extra taper can be used to create radii as tight as 5' for convex walls. Smaller radii can be achieved but this will require cutting.
An outside curve must be constructed using tapered units. To create smooth flowing curves it is better to use the tapered 'lefts' on one row and then tapered 'rights' on the next row.
The faces of the units must be placed tightly together. Depending on the radius of the curve it may be necessary to have small gaps in the back corners of the adjacent units. (Large radius walls can be created by adjusting the placement of the units. You will have to cut coping units to finish the wall)
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STRAIGHT COPING
A concrete saw can be used to trim the units to a proper tampered fit
*NOTE: Concave Wall-Radius will increase with height. Minimum radius -(number of courses x setback) will be the position of the face of the first course from the centre point of the radius.
Convex Wall-Radius will decrease with height. Number of courses x setback + minimum radius will be the position of the face of the first course from the centre point of the radius.
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