Thanks guys,
Some good comemnts and I will retract my statement and carry-on. Yes I was aware that IMAA had rules pertaining to sanctioned events, but I was talking about just in general and non-events. I guess maybe I have not observed enough giant scales to see how safe it may be. Just wanted to point my finger to a rule and say follow it. But since my club has no rule and seems like others think it is not necessary, I will just observe this coming year and watch to see how other clubs deal with Giant scale engines.