ACI 318 Appendix D Question
ACI 318 Appendix D Question
(OP)
Section D.5.2.9 indicates that you can use reinforcing steel to resist tension loads when the loads exceed the concrete capacity. However in the commentary it says that the largest bars tested were #5's and that reinforcement should consist of stirrups, ties and hairpins.
So what about a bearing plate on the top of a concrete column with hooked vertical reinforcement under the bearing plate. The reinforcement is located closer than 0.6hef to the anchor bolts. Has anyone seen any literature on this? Thanks.
So what about a bearing plate on the top of a concrete column with hooked vertical reinforcement under the bearing plate. The reinforcement is located closer than 0.6hef to the anchor bolts. Has anyone seen any literature on this? Thanks.






RE: ACI 318 Appendix D Question
RE: ACI 318 Appendix D Question
RE: ACI 318 Appendix D Question
If you use anchor reinforcement, don't they make you design the anchor reinforcement to take everything and neglect the contribution from concrete breakout? There is some added conservatism in that procedure.
RE: ACI 318 Appendix D Question
RE: ACI 318 Appendix D Question
And I have to also be honest with you I have not yet had to read the latest version of ACI appendix D so I haven't really been through the new sections yet that discuss the help of reinforcement. To me this is an area where it would be nice if more research were done and we need a whole lot more explanation on how to implement it.
I'd like to hear what others have to say about this proposed idea.
John Southard, M.S., P.E.
http://www.pdhlibrary.com/
RE: ACI 318 Appendix D Question
RE: ACI 318 Appendix D Question
Just use it and make sure you have enough rebar development lengh ld or ldh on both side of failure plane
anchor bolt design crane beam design
http://www.civilbay.com