Floor joist supporting bricks damaged, best way to fix? Inject mortar under?

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Hi All,

Went to the basement to check the state of things recently (rarely go there..) and along crumbling render on basement walls to be re-done I noticed this floor joist which in most places does not rest on the wall anymore. For one moment I could not believe it is mean to be supporting / structural for the floor but someone went in the corridor and jumped on floor and first step of stairs and that beem moved up and down :oops:.

Whilst I am not overly concerned that the whole corridor will collapse imminently I would like to plan for a repair as part of the general maintenance of the house.
In your opinion, what would be the best way to repair?

I assume it is best and less invasive to seek a method to repair whilst leaving the joist in place. My dad suggested injecting mortar however I am unsure how this could stay in place whilst drying and also concerned about moisture getting in the joist. Another solution might be to remove bricks, place some adjustable bolt down post supports (mini jack with two steel plates to lift by tightening bolts) and put new bricks under but I am unsure the new bricks height will have the exact height to support the joist. Ideally we would also place DPC under that joist to keep it going for even longer.

Any insight and advice much appreciated!
 

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If that’s just one of several joists, and not a trimmer or taking extra load, it might not necessarily have ever needed to be supported by that wall, but you could pack slate in in a few places to get rid of the bounce.
 

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