3608.1SCOPE
Provide manufactured concrete armor units for use in stream bank, riverbank, and lakeshore stabilization, and for soil bioengineering construction.
3608.2REQUIREMENTS
Use interlocking concrete cross shaped units, each with 2 individual and symmetrical interlocking halves, to provide concrete armor units. Assemble the units with the 2 individual halves forming a 3-dimensional cross with 6 symmetrical legs. Assemble multiple, identical units into a continuous and flexible interlocking matrix with a 40 percent void space for soil filling and planting. Use concrete meeting the following requirements to form the armor units:
Ensure each concrete armor unit meets the physical requirements in accordance with the following: Table 3608.2-1 Concrete Armor Units Size Designation A-24 A-36 Overall dimension (outside of leg to outside of leg) 24 inches 36 inches Thickness of each side of leg 3.6 inches 5.5 inches Kerf corner reinforcement 1.8 inches 2.7 inches Overall weight of assembled unit 78 pounds 265 pounds NOTE: Dimensions are Nominal dimensions with a 10 percent tolerance.
3608.3SAMPLING AND TESTING — BLANK
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