Technical Resource Guide_WEB_BEL25-D-516650 - Page 33 of 84

33 | belgard ® product installation guide | belgard.com | 877-235-4273 Daylight Drainpipe at least every 50 feet to ensure proper drainage. Leveling Pad Drainage Aggregate Base Material CONSTRUCTION OF SUBSEQUENT COURSES • Clean any debris off the top of the blocks. • Place the second course of blocks on top of the base course. Maintain running bond. Pull each block forward as far as possible to ensure the correct setback. See Diagram 5. • Fill cores (if applicable) and voids between blocks with ¾-inch free-draining aggregate prior to laying the next course of block. Clean any debris off the top of the blocks. • Backfill with ¾-inch free-draining aggregate directly behind the block, adding 6 inches at a time followed by proper compaction. Fill thickness will be dependent on compaction equipment. • Add retained soil behind the aggregate. Compact before the next course is laid. • Don’t drive heavy equipment near the wall. Self-propelled compaction equipment should not be used within 3 feet from the back of the wall. • Keep the wall bond by placing units in a staggered relationship to the course beneath. • You may need partial units to stay on bond. A saw with a diamond blade is recommended for cutting partial units. Use safety glasses and other protective equipment when cutting. DRAINAGE DESIGN • Each project is unique. The grades on your site will determine at what level to install the drainpipe. • Place the drainpipe as low as possible behind the wall so water drains down and away from the wall into a storm drain or to an area lower than the wall. See Diagram 6. • Fill in the area behind the blocks with ¾-inch free-draining aggregate, at a minimum of 12-inches from behind the back of the block or 24-inches from the front of the block, whichever is greater. • You may need to place and backfill several courses to achieve the proper drainage level. See Diagrams 7 and 8. • The drainpipe outlets should be spaced not more than every 50 feet and at low points of the wall. In order for the gravel fill to function properly, it must keep clear of regular soil fill. See below diagram of daylight drainage system. Diagram 5 – Next Course Construction Diagram 6 – Drainage Diagram 7 – Backfill Diagram 8 – Compaction