Originally Posted by CampNBrew2
This is what I'm thinking as well, but would like to hear an answer from a trusted source. The rigs with these level systems must be designed for that much load on the frames. I think our lightweights would just twist and bow. When setting up (before setting the jacks), I can see the tongue and frame flex a bit when someone enters the trailer and walks around.
It's not the frames are any different, but rather the hydraulic/electric leveling jacks are much sturdier/stronger than the stabilizers, or outriggers as you called them. The leveling systems jacks were designed to lift the rvs where stabilizers are, as the name implies, are to only stabilize once level.
If the frames were designed specifically for level up systems then they wouldn't be able to sell/install those systems aftermarket, they'd have be a special order from the factory, which they aren't & they do install aftermarket.