Once the new joists were up we found locations where the concrete blocks could sit flat on the ground so the pressure wouldn t cause them to crack.
How to lift or jack up sunken floor joists.
Jacking up the deck and shimming the post can resolve deck sag problems.
After they were in place we hoisted up the 4 x6 x8 beam so that it crossed all four of the new joists sliding the screw jacks underneath.
It has to be jacked up slowly over days or even weeks to avoid cracking drywall plaster windows and even structural elements.
Generally there are posts and beams under the floor joists.
Continue raising the jack until the deck is no longer.
Identify the area of the deck that is sagging and locate the support post that needs to be shimmed.
Raise the jack so it contacts the wooden floor joist supporting the decking.
Get the jacks under the floor.
Anything involving 20 ton house jacks will take time.
Jack up that portion of the house and place new footers.