"In housing, load-bearing walls are most common in the light construction method known as "platform framing", and each load-bearing wall sits on a wall sill plate which is mated to the lowest base plate. The sills are bolted to the masonry or concrete foundation."
Someone told me that the basement was made with a lot of concrete and would be a major job to cut through the concrete, so think the jack posts are a reasonable solutions. The more posts the less load on each posts. If you think the concrete will crack maybe i should but a large metal plate as a base?
I guess this footing won't work would it?
Each beam is different shapes and width, i don't think it is a good idea to lift them all at the same time.
There is about 2" of sagging, i can try slowly slowly.
Keep in mind, the wet basement is now solved which is the cause of the sagging, the house has stood up this long.
Once it's jack up a bit i can sister another beam on there and few more blocks will make it plenty strong.