Installation guide - 24

WALLSTONES, COLUMNS AND STEPS

SPECIFIC INSTALLATION DETAILS SUPRA CITADIN 180 BLOCK (CONTINUED) 7. Backfilling

After installing the drain behind the wall, fill the space behind every second row of the modules with 3/4 in. (20 mm) clean gravel to a depth of about 8 in (20 cm). Use a membrane to keep the retained soil from contaminating the clean gravel. Repeat these steps up to the desired height. 8. Coping modules Citadin 90 coping modules comprise the top row of a Supra Citadin 180 wall and hang over its front. As these modules are not installed with connectors; they must be glued to the underlying row with a concrete adhesive.

26 - Volume 24 BOLDUC Installation Guide