I likely wouldn't, as I would either use a cast-in anchor, or use a post-installed anchor (with a removable component if need be).
Some context might be helpful - and if you are trying to justify via ACI, the answers would likely depend on the load direction (i.e. Tension, Shear or Both)?
Personally, my initial thought is that ACI 318 doesn't really address this case, so I would say neither.
And I have a hard time envisioning a scenario where I think this would be a good idea anyway. Why not just use a cast-in insert instead of a cast hole?
Exterior? If so, I think the issue may be top and bottom support only - if designed at all, I generally see storefronts with vertical mullions included. Then glass is four side supported and not really an issue.
I think the information from Portland is on the "standard" nuts, not couplers, and I don't know that assuming that they have the same cross-section is a good idea.
In my mind, I would expect that you would need to do some analysis (thread pullout of the various components, overall tension on...
Dewalt / Elco Dril-Flex come in both a Phillips Undercut Flat-head
(https://anchors.dewalt.com/anchors/products/screw-fasteners/self-drilling-metal-screws/dril-flex/dril-flex_phillips_undercut_flat_head.php)
and Phillips Undercut Wafer head...
Interesting - will have to track down that report at some point - and glad to hear that someone has been digging in deep on the issue since I last investigated - aluminum design can already be challenging, and hopefully there will be some more tools available to handle these cases.
Having worked in the unitized curtain wall industry in the past, the structural behavior of aluminum extrusions (LTB and snap together male/female mullions) has been an issue for a long time.
Some specific comments -
1) From memory (and based on 2010 ADM), the flexural checks for...
Elco/Dewalt Bi-Flex are 300 series stainless steel, plus have a separate hardened tip, to provide better protection against hydrogen embrittlement / HSCC issue. And do come in an undercut head.
I think the OP was talking about the edge to the bottom in their sketch (approximately concrete thickness minus embedment).
Personally, I have always just followed the ACI defined minimum concrete thickness requirements of the product in question and have never tried to justify a condition...
In terms of the concrete edge, what I meant by my question was where is the concrete edge (horizontal in your sketch) relative to the bend in the bolt? Poorly worded on my end.
But I don't believe any of the software packages have provisions for inclined rods. The only option for analysis that...
Assuming rectangular tubes? Check Part II / Chapter H of the Commentary Section (at least it's defined there in the 2010 ADM). See below
https://res.cloudinary.com/engineering-com/image/upload/v1729767367/tips/ADM_eng_tips_102424_nddss7.pdf
Where is the edge of concrete relative to the bolt?
And some reason at 30 degrees? ACI provide pretty clear guidance on a 90 degree condition, and some of the software from the anchor manufacturers (i.e. Hilti Profis, Simpson Strong-tie Anchor Designer) can calculate for you.
Please don't misinterpret my comments - structural engineers do design building with very specific dimensions, details etc. - my point is that too often the final constructed product doesn't match, either due to known and discussed modifications during construction (through RFI's, etc.) or just...
If, per your previous post, this is really just a modelling exercise, I wouldn't get too hung up on specific dimensions.
And anyway, in my mind, if you were trying to evaluate an existing building, even if you had every dimension on the original contract documents, you would likely want to...
I recommend taking a look at the Hilti "Post Installed Anchors in Masonry" Design Guide (available online) as it will clarify how the various building codes address the design of these components.
