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Post-installed anchor qualification standards are referenced in ACI 318-08 Part D.3.3.2, ACI 318-11 Part D.3.3.3 and ACI 318-14 Section 17.2.3.3.ĪCI 318-08 seismic anchoring provisions must be satisfied for both tension and shear. Flexural crack widths corresponding to the onset of reinforcing yield under seismic loading are assumed to equal 0.02 inches.
Hilti anchors for wood sill at concrete salb cracked#
ACI 318 requires post-installed anchors to be qualified for seismic load conditions via testing in cracked concrete. The ACI 318 and IBC codes assume cracked concrete conditions for the design of cast-in-place and post-installed anchors because the existence of cracks in the anchor vicinity can result in a reduced ultimate load capacity and increased displacement at ultimate load. ACI 318-11 Part D.3.3.1 and ACI 318-14 Section 17.2.3.1 define seismic anchor design as that for “anchors in structures assigned to Seismic Design Category C, D, E, or F”. ACI 318-08 Part D.3.3 defines seismic anchor design as that which “includes earthquake forces for structures assigned to Seismic Design Category C, D, E, or F”.
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ACI 318-14 seismic anchoring provisions are given in Section 17.2.3 – Seismic design. ACI 318-11 seismic anchoring provisions are given in Part D.3.3 – Seismic design requirements. ACI 318 Seismic Provisions for AnchorsĪCI 318-08 seismic anchoring provisions are given in Part D.3.3, which is included in Part D.3 – General requirements. This article discusses the changes between ACI 318-08 Appendix D seismic provisions and ACI 318-11 Appendix D/ACI 318-14 Chapter 17 seismic provisions, and includes a brief discussion about the International Building Code (IBC) seismic anchoring provisions. Anchorages designed to resist seismic load conditions require special consideration. The American Concrete Institute (ACI) Building Code Requirements for Structural Concrete (ACI 318) includes provisions for anchoring to concrete in Appendix D (ACI 318-02 through ACI 318-11) and Chapter 17 (ACI 318-14).