Have no idea, but our racecar trailer had sagged quite a bit after 19 yrs with a load on it and when we jacked it up to put new tires on it this summer, in the 2 days it was on jack stands it raised the trailer about 1" when we sat it back down and it stayed in the raised position for the 3 months it sat before selling.
I don't have the manual anymore since we sold the first rv, but I thought it recommended raising the trailer when in storage to take the pressure off the torsion axles.