Originally posted by Dialtone:

Arn if the developers made structures crumble at the bottom first, just imagine the massive influx of angry posts from people who just couldn't stop themselves from putting just one more piece on top. Only to have their whole building crumble like a house of cards. Yes IRL most buildings break where there's too much stress, which due to gravity and mass is usually at the bottom.

lol not to mention the horrid performance tanking that would occur if your entire base started to crumble from the bottom up ... jeez wouldn't want to be around for that lol.