Mini jacks

[filthymcnasty]

I'm getting my old concrete floor busted up and repoured. I've built some stud walls on the existing concrete and I was wondering if there is any type of mini jacks I can place under the studs after the old concrete is removed to prevent them from caving in until the new concrete is poured. Thanks in advance for any info.

 

[GarageEnvy]

I watched a fireplace mason use a step jack to level a masonry fireplace one time but it wasn't exactly mini. I would think some angle iron under the studs and a jack on either end might work just as well or better.