The issue is regarding the orientation of the intermediate cross ties within a boundary element. Per ACI 22.214.171.124, the crossties shall be alternated end for end for proper confinement (see section 126.96.36.199c for required transverse reinforcement in a boundary element). This week we found out that the cross ties were installed incorrectly for approximately 8 boundary elements; where, the 90 degree hooks were not alternated within the shear wall boundary elements. We have been looking for a solution to provide confinement that satisfies ACI 188.8.131.52; this has included, FRP wrap/anchors (FYFE, BASF), reinforced concrete jacket, but each solution has not been successful. Has anyone ever run into a situation where this has occurred? Is there anyway to justify/provide confinement after a wall has been cast. I appreciate your feedback.
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