Mine sat on concrete blocks under the floor. Jacks were down to help keep the TC from a blow over from high winds.
I left my first (1972 9' 6") TC lowered just enough we could step up into it and left the TC on the 4 corner jacks from OCT to warm up time in April. The next summer the jacks were so loose and shaky I had to up size all the jacks mounting bolts so they would tighten.
I didn't leave the next two TC we owned on their jacks.
Living in constant high wind parts of the country where all the trees along the road lean in one direction (to the north) we have to be vigilant on sheds....mobilehomes...tall sided rvs having a blow over if exposed to those high winds.
