P!
Probably not enough rebar in the concrete.
I’d be a little scared to work in the office below that
This is a prank waiting to happen. Just use Twitter or Facebook to do a flash mob inside the building where everyone gathers on a particular floor and at a very specific time everyone just starts jumping up and down for one minute. Then go down or up ten or so stories and do the same the again. The people monitoring the building would certainly close the building again.
Technomart... huh. I think I won’t be visiting their cinema megaplex anytime soon.
That said, Korean concrete is mixed with a *LOT* more sand than what is allowed in concrete mixed in the US. Also, their construction companies do not let it cure before building around it.
Funny, I had a motor home like that. But that’s another story.
The local mall, Galleria at Crystal Run, flexes rather oddly on the upper deck if people walk ‘hard’ on the floors.
Saw a bridge flex from foot traffic when a bunch of soldiers wandered across it.
Rather trippy stuff.