Repairing rusted steel posts in crawlspace
The house I am buying was built in 2000 in the mid south (non coastal). Its built on carwlspace and all of the steel supports are rusting at the bottom. This is due to the design of the crawl. The builder put trenches in to drain any water out (lot slopes front to back). Sadly, the steel posts sit in the trenches. The general inspector noted "Monitor Condition". There are no cracks or settling evident.
However, I had a structural engineer out for some remodeling plans and had him look. He said its an issue, not huge, but should be repaired.
He suggested drilling a hole through the steel high above the water line and putting a bolt through and then pouring concrete around. Or cutting the steel post high, pouring concrete footer and then bolting the post to concrete.
Do these sound like good ways to deal with this? I was leaning towards the first option of drilling a hole through and adding a bolt and concrete around. And any suggestion on how this should be done? What type concrete and bolts to use? How much concrete and do I make a form for each first? I have done a lot of diy projects and this seems like it should be straight forward but its not something I am familiar with.