leveling a class a motorhome

Thanks all, it sounds like the jacks can take the weight of the front with no problem. I have a long 2*10 with a 6*6 on top of it going across the front that the jacks hit this lifts the front up about 6 inches off the ground with the rear wheels and parking brake firm. When I tried to do auto leveling without the boards the jacks just get to full extended as they touch down. I'm not too concerned only because it is just to get the truck level for the fridge. I doubt I would be comfortable with it in that condition while staying in it.