ACI 318-11, Appendix D Anchorage Ductility
ACI 318-11, Appendix D Anchorage Ductility
(OP)
Hi All,
I'm currently designing the anchorage for some mechanical units and ran into something in the new code that I hadn't realized. Section D.3.3.4.2 of ACI 318-11 specifies that we need to ensure anchor ductility, but there used to be a provision in the IBC (Section 1908.1.9 in the '09 IBC) that gave an exception for non-structural components. It looks like this exception is no longer there, and I'm disappointed in that because ensuring ductility seems like a pain. Is this truly what I have to do from now on with non-structural components or is that exception hiding somewhere else just waiting for me to find it? Let me know. Thanks everybody (or at least the people who reply).
Jason
I'm currently designing the anchorage for some mechanical units and ran into something in the new code that I hadn't realized. Section D.3.3.4.2 of ACI 318-11 specifies that we need to ensure anchor ductility, but there used to be a provision in the IBC (Section 1908.1.9 in the '09 IBC) that gave an exception for non-structural components. It looks like this exception is no longer there, and I'm disappointed in that because ensuring ductility seems like a pain. Is this truly what I have to do from now on with non-structural components or is that exception hiding somewhere else just waiting for me to find it? Let me know. Thanks everybody (or at least the people who reply).
Jason





RE: ACI 318-11, Appendix D Anchorage Ductility
The plot thickens. If you look at current ICC evaluation reports for expansion anchors it may say something like: "For the 2012 IBC, Section 1905.1.9 shall be omitted. Modifications to ACI 318 D.3.3 shall be applied under Section 1908.1.9 of the 2009 IBC, or Section 1908.1.16 of the 2006 IBC"
I think it may get worse before it gets better. ASCE 7-10 supplement 1 has added overstrength factors for component anchorage in chapter 13. The 2015 IBC will probably reference this supplement.
RE: ACI 318-11, Appendix D Anchorage Ductility
The one small piece of consolation is the 1.3 amplification factor for anchorage to concrete has been removed.
RE: ACI 318-11, Appendix D Anchorage Ductility
RE: ACI 318-11, Appendix D Anchorage Ductility