The first floor (not pictured) was quite barren, aside from some heavy duty electrical switches. The second floor was pretty empty as well, except of course for the lower portion of the air tank that was literally protruding from the ceiling. No water damage, rust, or spalling was evident that seemed to have compensated the structure.
The lower access door was missing, which would've bolted to the tank to create an airtight seal in order to maintain the 120 psi pressure inside. The centered port on the bottom is the end of the beam pipe, where the particles were ultimately shot out of. Other ports are for the air compressor hookup and exhaust.