Imagined his containment chamber completely different, you have to keep in mind that it is 5 m^3 and made of airtight steel(according to the article) , which would probably mean it wouldn't be so thin from the inside, as shown in your picture, but very thick and as a result a lot heavier, and it would also make sense when you think about it, you wouldn't want him to scratch his way out of there.
Made a quick sketch to demonstrate how I imagine it (sorry for shitty quality, took it with a phone and also downscaled)
and just so you could understand what's going on.
(changed a few details, like with the control booth, but the jist of it is still there)
The columns/support beams or w/e you want to call them are important because they allow the personnel to check every face of the chamber.
the separation wall in the sketch I made definitely shouldn't look like that, maybe it should have some glass windows, but definitely not a glass wall with barbed wires, just wanted something to put there and not obstruct the general idea of it.
the movable platforms should be made in a way that if they hit the containment chamber then you could also climb on top of it to check if there are any cracks or holes, or whatnot, and for the bottom of the containment chamber I suppose there could be ladders that can be found in the room of the control booth.
As to what you were talking about with the room that 096 is found in. I think that shouldn't even matter and 096 should actually just roam around; otherwise it's extremely easy to avoid him, and the walking animations are already there so it is possible.
Some quick links for myself (and you all too).
SCP-096 model
MTF model
Forum Smileys
deviantART
Pixel Joint
Enjoy