ACI Appendix D - Applies Only to Anchors 2" Diameter or Less?
ACI Appendix D - Applies Only to Anchors 2" Diameter or Less?
(OP)
Hi Everyone,
I am designing a concrete connection using HRC headed rebars with 2.25" diameter (#18). I am using App D to check concrete breakout so I can determine how deep the HRC heads need to be. According to D.4.2.2 (I am using ACI 318-02) the equations in App D for concrete breakout are only applicable for anchors not exceeding 2" in diameter and 25" embedment. I already used the concrete breakout equations to come up with a 39" embedment for 2.25" diameter anchors before I saw this. Is my analysis still valid? If not, can someone point me to some reference material as to what the proper procedure is that I need to follow?
Thanks in advance!
I am designing a concrete connection using HRC headed rebars with 2.25" diameter (#18). I am using App D to check concrete breakout so I can determine how deep the HRC heads need to be. According to D.4.2.2 (I am using ACI 318-02) the equations in App D for concrete breakout are only applicable for anchors not exceeding 2" in diameter and 25" embedment. I already used the concrete breakout equations to come up with a 39" embedment for 2.25" diameter anchors before I saw this. Is my analysis still valid? If not, can someone point me to some reference material as to what the proper procedure is that I need to follow?
Thanks in advance!






RE: ACI Appendix D - Applies Only to Anchors 2" Diameter or Less?
I don't know of any codes that define allowables for large anchorages, although I am sure that if there is any, someone will reference it on this thread.
If you can't reduce the diameters of your anchoring element, you'll have to use your judgement. Following the general format of Appendix D backed with a healthy dose of conservatism is probably pretty sound.
RE: ACI Appendix D - Applies Only to Anchors 2" Diameter or Less?
RE: ACI Appendix D - Applies Only to Anchors 2" Diameter or Less?
RE: ACI Appendix D - Applies Only to Anchors 2" Diameter or Less?
RE: ACI Appendix D - Applies Only to Anchors 2" Diameter or Less?
RE: ACI Appendix D - Applies Only to Anchors 2" Diameter or Less?