Vice grips on the screws from underneath are very
helpful to loosen up rusted lag screws.
I had my Burro
on jack stands for two months. 2x4's run front to back with 2x6's running width wise bolted to the 2x4's. I used two 'mobile' 2x4s to hold the new flooring in place before I fiberglassed it in. (different floor structure than most)
I used the scissor jack from my car on a pier block that I had in my yard to get the height I needed to clear the tires
. Raised it one "click" on the jack stands at a time front to back. Would have been a little easier with two jacks.
After I pulled the frame out I stacked pier blocks and some wood scraps to give support in the middle of the 2x6's. After two months I can still see the sag in the middle of the 2x6's. I wouldn't support on the flat edge of a 2x6 without support in the middle.
Just tilt your head to the left a little to view.
is in my driveway. I think that I have met more neighbors in the past two months than I have in 25 years.