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RE: ACI 318 Appendix D[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: ACI 318 Appendix D
- From: "Freeman Tang" <FTang(--nospam--at)gouvisgroup.com>
- Date: Thu, 16 Apr 2009 15:45:05 -0700
Through-bolts with bearing plate at footing bottom and embedded anchors in footing are different in the way that through-bolts are externally applied load from the underside of the footing and cast-in- anchors are internally exerting forces inside the concrete footing.
For example the transfer of load from a steel column base plate on top of an elevated concrete slab I don’t believe we need to go through Appendix D to justify that the connection is ok as long as punch shear is checked and ok. Also if a heavy chandelier is supported by a tension rod through this elevated concrete slab with a bearing plate secured on the top of this slab, I don’t believe we need to justify the connection with Appendix D.
So I don’t think it is a loophole in the code, basically only the eight types of embedded anchors indicated in Appendix D are included.
We start resembling lawyers looking for loopholes. >From the structural standpoint, the thru bolts in pullout are essentially the same thing as the cast-in bolts.
So, I will not be surprised to see them included in the next edition or some errata.
V. Steve Gordin, SE
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