Post-Installed Anchor Qualification

Requirements for qualification testing and assessment of post-installed anchors are defined by ACl 355.2 and the relevant ICC-ES acceptance criteria (AC 193 and AC308). Three types of tests are included  

AC193 (2010), Acceptance Criteria for Mechanical Anchors in Concrete Elements, International Code Council Evaluation Service Whittier CA. 

ACI 318-08, Building Code Requirements for Structural Concrete and Commentary, American Concrete Institute Farmington Hills, Ml. 

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Traditionally, post-installed anchor design has been based on mean ultimate test data divided by a global safety factor of four (4). This approach has been replaced by a system involving more rigorous qualification testing and strength design concepts. 

Post-installed anchors must satisfy certain qualification requirements in order to be used to resist seismic loads in a structure assigned to Seismic Design Categories C, D, E, or F. These involve the performance of specific tests and application of acceptance criteria for qualification and determination of relevant design parameters. ACl 318 Appendix D references ACl 355.2, Qualification of Post-installed Mechanical Anchors in Concrete, for the quahfication of expansion and undercut anchors. This document has been incorporated into acceptance criteria used by the ICC Evaluation Service for issuance of Evaluation Service Reports on anchors to demonstrate conformance with IBC Section 104.11, Alternative materials, design and methods of construction and equipment. AC 193 provides acceptance criteria for mechanical anchors. AC308 provides acceptance criteria as well as supplementary design provisions for adhesive anchors. 

ACI Committee 355 published the State-of-the-Art Report on Anchorage to Concrete in 1991. This was the first of a two-volume set whieh emphasized behavior and did not include design methods and procedures. In 2000, ACI Committee 355 published the ACI Provisional Standard, Qualification of Post-Installed Mechanical Anchors in Concrete (ACI 355.2-00) and Commentary (ACI 355.2R-00). This document prescribed testing programs and evaluation requirements for post-installed mechanical anchors intended for use in concrete rmder the design provisions of ACI 318/318R-02. It was designated an ACI Standard in 2001 and has since been updated twice, most recently in 2007. 

ACI Provisional Standard, Qualification of Post-Installed Mechanical Anchors in... 

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