I'm working on a basement renovation, and behind the wall I found the steel columns which I expected, but rather than sitting on the concrete slab like the other exposed one, there is a concrete footing above the slab. Has anyone seen something like this before, and is it safe to chip away or remove and put directly on the slab like the others?

Thanks in advance!

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  • support the ceiling with another post ... remove this post ... remove the concrete block .... extend the post and reinstall – jsotola Mar 14 '18 at 0:56
  • The slab may be lower grade concrete, so this distributes the load. In 60's style homes they used steel plates on slab with teleposts that had to be adjusted from clay shinkage in winter or expansion in summer from poor weaping tile drainage. – Tony Stewart Sunnyskyguy EE75 Mar 14 '18 at 1:35
  • Could what appears to be a concrete block actually be the top of a steel reinforced pier which goes through the slab down into the soil to a more resistant layer of limestone, shale or hard rock? In any case I don't think you should make any changes to this without an engineering report. – Jim Stewart Mar 14 '18 at 18:12
  • thanks for the comments everyone. I'm in London, ON, Canada and there is no limestone, shale or harder rock around as far as I know. The house was built in the 60's so Tony may be onto something. The only confusing part is that there are 3 posts in the basement - two like this and one just on the slab. The one on the slab has no cracking or issues, so I think I might be good to move and extend as jsotola mentioned. – Brandon H Mar 14 '18 at 21:35
  • Why do you think the builder put two of the posts on raised blocks? What are the lengths of the 3 steel posts? Is the distance from the ceiling beams to the concrete slab the same at all three locations? Could it be that the blocks were needed because two of the three steel posts were simply too short to reach? I have heard of, but not seen, posts with adjustable screw jacks to allow seasonal or progressive adjustment. Do your steel posts have adjusters at the tops? – Jim Stewart Mar 14 '18 at 22:02

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