Installation Instructions

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Step 1 - Base Course
Preparation for a Concave Curve
Place the blocks on the leveling pad
so there are no gaps between them.
Consider using PVC Flex Pipes to create
smooth and accurate curves. When
possible, start building a curve from the
center and work left and right through the
curve.
PVC Flex Pipe
Min. Convex Radius
3.0’ (0.9m)
Center of Curve
First Course
CONCAVE/INSIDE CURVE
RETAINING WALLS
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RADIUS OF CONVEX CURVES ON SUCCESSIVE COURSES
Center Stake
Top Course Radius
Base Course Radius
Convex Curve Chart
Block Rows Radius (Min.)
24-1/2"
26-3/32"
27-11/16"
29-9/32"
29-29/32"
32-1/2"
34-3/32"
35-11/16"
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