Allan Block Muros de Contención
Allan Block USA
Working with Radii
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To confirm that the AB product you are using will accommodate the desired wall radius.
Refer to the radius chart
The tightest or smallest radius at the top of any AB wall using full size block is 4 ft. (1.2 m), and 2.5 ft. (0.8 m) using the half width blocks. The final height of the wall will determine what the minimum radius at the base course must be. The wall creates a coning effect as it is stacked up, creating the need for a larger radius at the base course.
Use the radius chart
to determine what the radius of the base course of the wall needs to be, so the top course of the wall will not be less than 4 ft. (1.2 m).
Starting a Radius
From the point of where the curve will start, measure straight back from the wall the required amount (shown in the Radius Chart) and drive a stake into the ground. This will be the center of the curve. Attach a string line to the stake the length of the radius and rotate it around to mark the location of the base course. Install the blocks with the front of the blocks lining up with the mark.
To transition the curve back into a straight wall or another curve, lay out the curve and the first couple blocks of the next section. Adjusting 1 or 2 of the blocks will help in the transition of the next section of wall.
Curves with grid
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