6" X 7" X 12" Gray Large U-Cara Sure Track Enduracolor Backer Block | 175RSTB211121-0

Key Features

• Capacity - gravity walls upto 39 in. (1 m), geogrid reinforced walls upto 10 ft. (3 m)
• Recommended base stabilization - one layer of DriveGrid™ stabilization grid between subgrade and base material
• Standard base - minimum 6 in. - 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 - U-cara must be constructed on U-Grip™ base units or universal base pads
• Connection - features a tongue and groove connection, use appropriate concrete adhesive for connection between standard backer units or where the key has been removed for corners
• Handling - handle faces with care to avoid chipping edges
• For larger, gravity walls 18 to 36 in. (45 to 90cm) high, as well as steps, corners, pillars and planter boxes up to 24 in. (60 cm) high, choose the Large backer block. Walls up to 20 feet are possible using engineered geogrid reinforcement with the Large
• Packaging: 42 Unit/Bundle, 3 Layer/Bundle, 0.283 Face Feet/Unit, 15.85 Face Feet/Bundle