ACI 318 Appendix D and rebar development
ACI 318 Appendix D and rebar development
(OP)
A question, I have been asked to review some calculations and they are using Appendix D to calculate the development length of building pier dowels into a drilled pier. I believe that the dowels don't fit the definition of an anchor so Appendix D doesn't apply the length should be calculated using Chapter 12 "Development and Splices of Reinforcement"





RE: ACI 318 Appendix D and rebar development
My answer is if they're trying to transfer the forces into additional reinforcement via lap splices or struts. If not then I agree with their choice of using Appendix D. Further, even with force transfer to other reinforcement I still would likely check appendix D to ensure there wasn't a failure of the concrete pier (but it wouldn't likely be the controlling force in determining the tensile strength developed in the bar).
For further details I hand the floor over to KootK who will undoubtedly show up.
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
www.americanconcrete.com
RE: ACI 318 Appendix D and rebar development
RE: ACI 318 Appendix D and rebar development
RE: ACI 318 Appendix D and rebar development
RE: ACI 318 Appendix D and rebar development
RE: ACI 318 Appendix D and rebar development
If Appendix D were applied properly and showed enough capacity, that would probably do on it's own. Based on the calculated length, however, it doesn't sound as though it was applied properly.
Let us know how your situation may differ from the sketch below.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: ACI 318 Appendix D and rebar development