Wow, see what I get for not checking the forum over the weekend! :shock: Here's some additional background to help clear up (or add to) the confusion:
As I have posted about before, many of my projects are in rural areas on native land. In some cases there is no AHJ whatsoever and we are completely left to fend for ourselves. In this case, we DO have an AHJ, but they are (to put it mildly) hard to get a hold of. They almost never actually take phone calls, and written questions can sometimes take weeks for a response. Additionally, we have had questions in the past where they have actually refused to comment because they didn't feel "comfortable" reviewing an issue

itty
The second half of this particular quagmire is the relationship between the Owner, their fingerquotes "inspector" (not actually an inspector at all, but he looooves making suggestions :inspctr:roll

and us, the designers. For this issue, the "inspector"
suggested that our access panel be changed to a swinging door so that there would be more room to move equipment. The Owner approved this change over our objections. If it had remained an access panel, none of this would even have come up, because it is NOT a door, and would require a screwdriver to open, much like some of the suggestions made here.
So now that the door frame is already installed (again, over our objections) we are put in the precarious position of performing our own due diligence in making sure this is as code compliant and as safe as possible. If that is limited to "well, we warned you" then so be it.
The third part of this swampy mess is the configuration of the mezzanine and the placement of the door. The word mezzanine is in quotes because technically it has to be regulated as a second floor since it is not a part of the story below. It is separated by a 1-HR barrier all around (oh yes, that lousy door has to be fire rated too...). You can see from the photo in the OP that there is ductwork very close to the door on the mezzanine side which pretty much invalidates its use for moving large parts anyway. This also makes it quite difficult to have any secondary pipe barrier or similar feature that is not applied directly to the door frame.
The open side where the picture was taken from is the lobby of the building, so any kind of landing, railing, diving board, stairs, whatever, on that side of the door is totally out. Again, the normal access into the space is by floor hatch only. Did I mention we didn't want this condition in the first place?
Thanks to everyone for the suggestions and often-as-not hilarious comments. Please keep them coming!
-LP