Originally Posted by Lollygagger77
Ok, I am a little confused, I put my camper at a seasonal spot and actually put it up on bricks on the 4 corners, I do leave a little pressure on the tongue jack, but there is no rock to the trailer, if i am reading your statement correctly does that mean I should not do this? Can you elaborate a little more please?
I assume you have the trailer sitting on the axles/tires as the main means of support and are using the bricks on the corners instead of the stabilizer jacks. If that is a correct assumption, you are perfectly OK, because the bricks do not exert any pressure against the frame, they are merely stabilizing it, which is what the stabilizer arms are meant for.
That said, you should probably check your tire pressure a few times each year to ensure that tires losing pressure don't allow the axles to move lower, which would
create upward frame force on the corners by the bricks. This is along the same lines as the advice for not lowering your stabilizers when you park the trailer for the winter - for the same reasons. The tires will lose pressure and/or sink into a soft surface during freeze/thaw cycles, allowing pressure to be placed on the corners.
It's all in the design of the trailer frame. It is engineered to carry the load that is designed to be placed atop it - which is a downward force. The stabilizers place upward force, which counteracts the downward force. Fiberglass panels are not designed to flex top to bottom. When the forces try to do that, they will bow in or out somewhere - usually at seams, etc. Over time, the seams and the sealing can be compromised. Not a good thing.
A good illustration is this - take a look at an unloaded flatbed semi trailer. It is bowed up in the middle (front to rear). that's because it is designed to flatten out and become level when it is loaded. The same sort of strength theories applies to our travel trailers, but with less weight in mind.
I'm not a trailer designer, but I have taken the engineering courses that those designers must have, such as loads on beams, strength of welds and fasteners, the co-efficient of linear expansion (due to temperature changes), safety factors, etc. In this day and age, with cost in mind, everything is designed to certain specifications that fit the application - and no more. the days of manufacturer's designing in extra strength and durability to make things last longer are long gone. Jayco makes a good trailer, but they also have stockholders they are responsible to satisfy, as well. That's just business these days!
Probably more than you wanted to know!