The jackstands coming up through the floor scenario is pretty severe, but I suppose it could happen. [b] My little aluminum ones would likely just fall over and cause little damage. They don't do any real support since they are just stabilizers...
I am guessing that all but the most catastrophic earth motion would not overturn the trailer sideways...
A large Mobile Home gets all of it's support from it's many closely-spaced jack stands, removal of the running gear
combined with lateral movement is what makes the Jack's dependence on gravity dangerous in an earthquake. In California, Mobile Home
Jack Stands look like larger versions of the common pyramid/screw stabilizers for travel trailers, except newer installation codes require the tops of the screw portion (of the Mobile Home Jacks) to have clips that grab onto bottom of the I-beam frame rails.
A Travel Trailer, OTOH, is supposed to be supported by the axles/wheels/tires and the tongue jack. It's body is not likely to fall
to the ground. A center-mount screw tongue jack is best; a side mounted swing-up tongue jack might fold up in the midst of the bouncing, dropping the front of the travel trailer to the ground.
Your Wide-Body Burro
has a standard mounted torsion axle
, and it's body is wider than it is tall, keeping it's center-of-gravity relatively low, preventing it from overturning. My "Flipped" leaf spring axle
mounts have raised my narrower Fiber Stream's
center-of-gravity, bringing it closer to a tipping point during an earthquake.