[quote=LeeRoy]
Nah, once you get to a certain point it's just held together by its own weight. 
[/quote]

Please stop making me want to use the facewall.

So you're saying if I picked up a ten foot long kit-kat bar... it wouldn't break under its own weight?

Same thing for an incredibly long piece of steel. Without occasional reinforcement or supports, it WILL bend and break under its own weight.