Recently, while demolishing an old basement, I came across two jackposts which had been drywalled and hidden from view. They are the classic telescoping posts with the pin pushed through the middle to determine the height. These two posts hold the primary structure of the home (there are two), and rest on concrete pads (see attached pictures).
Before I close up the drywall, I would like to ask whether this style of jackpost is safe to use as permanent supports to the house? Or whether I should be investigating having some form of single steel column put in their place?
Any advice would be appreciated. Thanks in advance.