Keystone Retaining Wall Systems offer a broad range of products with solutions to meet the most challenging structural and landscape sites. The outer beauty of the Keystone block belies it's inner strength, which consists of a patented, interlocking fiberglass pin system that ensures a positive connection between the structural wall unit and soil reinforcement. The patented fiberglass pins facilitate precise alignment, making it simple and easy to create a variety of wall designs. Keystone units provide the most stable construction platform in the industry for taller gravity walls.

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Product Specifications:

Unit Name Units / Sq. Ft. Dimensions Weight Standard Unit 1 8h x 18"w x 21-1/2" d 120 lbs Compac Unit 1 8h x 18"w x 12" d 90 lbs Corner Unit 1 8h x 18"w x 8" d 75 lbs Mini Unit 2 4"h x 18"w x 10.5 d 45 lbs Universal Cap Unit 2 4" x 18"w x 10.5" d 45 lbs

ESTIMATION EQUATIONS:
Linear feet divided by 1.5 = # of blocks per course (add number of courses) or Square foot frontage of wall = Total number of units
Example: 100 foot long wall that is 6 feet high = 600 units 2 pins required per unit 3/4 rock for the core hole in and around unit Standard Units = .90 (rock) Compac Units = 1.3 (rock) Sample: 45 (standards units) x .90 = 40.50 Divided By 27 (1 cubic yard) = 1.5 cubic yards.