Can I fix these floor joists?

[compact]

Hopefully you can see the cracks in the photos.

A few of the joists under my floor are cracked, so give it a bounce.

Do I have to take up floorboards and replace or can I fix?

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[gregers]

depening on ammount of space,then sister the susspected problem joists,bolting them with either coach screws or nuts/bolts and timber connectors,or screw on a long metal plate?

 

[catlad]

You could measure the depth of your joists go down to your local timber merchants and get them to cut a sheet of ply into strips the depth of your joists. buy some bolts as Gregers has said and put a length or ply each side of the split joists and then bolt them together. if the floor has sagged a bit you can level it up before you bolt the ply on.

 

[Symptoms]

cat said:

"if the floor has sagged a bit you can level it up before you bolt the ply on."

Use a bottle jack or scissor jack (from your car) with a length of timber to ease up. Oh, and apply some building adhesive to the mating faces of joist/ply as well as the suggested mechanical fixings. Perhaps add some noggins here and there to add to the rigidity of the floor.

 

[compact]

I took some more photos to show the 3 damaged timbers.

This is the worst

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Followed by

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and finally

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Can all of these be fixed by bolting wood on either side?
If so what thickness of wood and bolts should I use?

Thanks

 

[TheVictorian]

Wow, what have you been doing in the room above!!

 

[compact]

Dancing with Elephants...

I'm hoping not to take up the floor boards as looking to sand them, but the first beam is cracked rather badly..
Could I knock out a few bricks in the supporting walls and slide in a new timber along side it, or would this be unfeasible?

 

[catlad]

If you can take a few bricks out and fit new floor joists that would be the way I would go, just sister them to your old joists with some bolts.