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HJ_AJS

Control Joints & Barrier Wall

Question

Are the control joint recommendations the same for a single wythe, fully grouted barrier wall, as they are for other CMU wall systems?  Would the control joints themselves be different?

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1 answer to this question

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The empirical layout and detailing recommendations of NCMA TEK 10-2C are applicable regardless of whether the CMU assembly is hollow, partially grouted, or fully grouted. If the assembly is solidly grouted because the reinforcement is closely spaced together (e.g., 8 or 16 inches on center vertical/horizontal) then it may also be worth considering the alternative crack control recommendations of TEK 10-3, which provide for an option to remove control joints altogether due to the presence of a large amount of reinforcing steel. Removing the control joints, however, does depend on the wall thickness, percentage of grouting, and reinforcement size and spacing.

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