4-1/2" Buff 4-Piece Random Bundle Rivercrest Wall Wall Block | UNP3310WJ0014401

Key Features

• Connection - features a unique integrated alignment connection, use appropriate concrete adhesive for connection between units where required
• Recommended base stabilization one layer of DriveGrid™ stabilization grid between subgrade and base material
• Standard base - minimum 6 to 8 in. of 3/4 in. crusher run gravel (any road base standard in accordance with ASTM-D2940) compacted to 98% standard proctor density (SPD)
• Alternative permeable base - minimum 6 to 8 in. of 3/4 in. clear open-graded stone compacted to achieve full particle lock up and consolidation
• Levelling - levelling retaining wall blocks directly on top of gravel is tedious and generally does not yield the best results
• Coping - this wall requires coping