Airplane video is unavailable, the building destruction doesn't seem to have been done in one hit, nor is he just breaking the full building, he's collapsing it. No real way to scale it unless we got a view of the pillars/load-bearing walls and shit holding it up from the inside. Probably would only be like 9-B to 9-A.
We wouldn't use this. Even if we did, IRL building demolitions operate, afaik, off of multiple staggered blasts. Functionally the same thing as taking multiple hits.
This calc sucks. The assumption of proportions is insane. He's assuming the hole is the entire width of the building, at nearly 28 meters. That doesn't make any sense in any capacity. If there are reasonable assumptions by which you would calc this feat, these are not them.
Gun to my head, given the segmented nature of the feat (you can see multiple impacts causing the building to collapse; irl we know this is because of multiple blasts, but in universe seems to suggest these were him striking the support walls), I'd go with the destruction of just one load-bearing wall. So, something like this:
Refactoring the storey height to 3.9 meters (the value given for commercial buildings by Wikipedia) gives us a new room length of 2.87 meters. I actually think it's a little over double this, as from the design of the building, I suspect it's two windows to a room, so I'll include that as a high end.
Thickness of an office building wall is
about 30 cm (using average of exterior walls, since he punched through those too).
Volume = 3357900 cm^3 (3.3579 m^3)
High-end volume = 6715800 cm^3 (6.7158 m^3)
4 j/cc * 3357900 cc = 1.343e7 Joules (
Wall level+)
4 j/cc * 6715800 cc = 2.686e7 Joules (
Small Building level)
While I think the room width used by the high-end here is actually more reasonable, I believe that the assumption of destroying a whole wall is, in of itself, a really big highball and is unlikely. That said, I think this is as close to an ideal as I could get, with the extremely limited information available to us.