Floor joist sat on single crumbling brick. What shall I do?

I would prop the area with some acrow props and then remove damaged brickwork and replace. If the joist needs replacing then its probably best to leave it in and bolt a new joist to the side of it. Hope this helps. Cheers.

This would need some acros to support the joist whilst weakened bricks are replaced and packed and mortared back to good. Assuming lower level bricks are good to foundations it’s actually quite an easy fix.

Prop the existing joists by placing scaffold boards or 100x50 timbers at 90 degrees to the existing timbers and install Acro Props transferring loads to ground. This supports the structure enabling the weak structure (assuming wall plate and timbers) to be replaced but make sure you dry pack the mortar under the plate so it does not shrink when dry. Any god builder should easily do this. Robert Mitchell- Charles Dean Developments Ltd

Hey Andrew, The best course of action is to get all the joists checked, for your and your families safety its important to asses the integrity of the structure. A crumbled brick isn't caused by one problem there is usually more at play. replacing it is explained in the answers above that's not the concern, however i'd refrain from doing it yourself. Some things are better left to the structural professionals Best of luck, Plan Design and Build

This may read as glaringly obvious for which I apologise in advance if taken as so the best course of action is to remove the the brick work that is blown as far back to a solid foundation as possible with in reason examine the end of the the tinder normally this will be rotten if this is so then you have two options either replace it with a new one which I would recommend but if this is more of a job than it seems and the timber along its length is sound you can marry a piece of new timber along side the existing one to pick up into the reinstated brickwork there may be more to this but without actually being able to physically assess the issue it’s unfair to both of us to speculate I hope this will be of some help regards Neville

Initially, you could acro prop the joist in question. From there, the end of the joist and the crumbling brick can be repaired/replaced. I would recommend having the cause of the brick defect looked at, the age of the house would suggest a baked clay red brick which will not suffer damp over time It will be worth having a look at the big picture as you may be able to prevent a much bigger job later.