1. The anchor trench is used to secure the RAWMAT® HDB at the top of a slope.
2. A formation angle of 2.5 Horizontal : 1 Vertical is required; this can be checked by making a simple reference "traveller".
3. The RAWMAT® HDB membrane should continue across the bottom of the anchor trench.
4. RAWMAT® HDB taken into an anchor trench around perimeter of lagoon.