See here how the TTE® system is used for building a lunging ring

The pictures show finished TTE® ground construction systems in a lunging ring / round pen and the individual steps taken to build them.

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The higher the speed the more a horse leans into the curve. The hooves no longer touch the subsurface vertically but instead the joints are more and more loaded on one side. The layer taking the impact of the hooves is transported to the outer edge and a deep groove is formed by the hooves.
These problems are solved using the "lunging ring disc" from HÜBNER-LEE. The surface becomes steeper towards the outside, comparable with a saucer (protected by patent).

: The starting situation: The lunging ring with the existing border, but with a poor substructure, covered with water, mud

: Step 1: The existing soft substructure was removed and replaced by round gravel. The border was increased was height so that the surface could slope up to the edge.

: Step 2: Modelling of the edge area and beginning laying of TTE® grid plates on a fine mesh (a laying aid).

: The simplest way to do the laying is from the middle out to both sides whereby the rows progressing outwards become ever shorter.

: The individual TTE® grid plates can be fitted at the edge using a circular saw (tungsten carbide blades).

: Step 3: Fill the TTE® grid plates with washed (water-permeable) sand or fine round gravel.

: The tilt of the TTE® grids at the edge is clear to see here.

: Step 4: Application of the layer taking the impact of the hooves. The existing sand was too loose for lunging which is why wood chips were used as an aggregate.