Considerations in Post-Installed Anchor Design

The following factors should be considered when designing connections using post-installed anchors  

2 Required Edge Distances, Anchor Spacing, Embedment Depth, and Anchor Length 

The anchor selection process should also include a check for the necessary anchor projection to accommodate the attachment requirements, including the length of thread available. 

Information regarding the anchor length, minimum edge distance, anchor spacing, and member depth are contained in evaluation reports issued by ICC-ES, or other evaluation services and in product literature. Design for reduced anchor spacing and edge distance is addressed in the provisions of ACI 318 Appendix D. 

Where it is suspected that the concrete contains significant voids, use of expansion, screw and undercut anchors should be avoided. Likewise, capsule anchors, which provide a finite amount of adhesive, may be inappropriate. Where voids are suspected 

---