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 Post subject: Shared floor joist
PostPosted: Thu Jun 21, 2018 4:35 am 
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Hi, first of all, i’m Not a handyman but woman. I’ve searched the internet but can’t find an answer to my question so hope I can get help here.
We want to lower the floor in my daughter’s bedroom as there is limited head height due to a sloped ceiling. The floor joists are shared by the neighbour. It’s a Victorian terraced house.
The builders think it’s Ok to cut the shared joists and put brackets in the wall to support the new lowered floor joists. I’ve read that the braces are enough to support the new joists but is it ok just to cut the shared joists and leave them?
Is it enough for the neighbour’s joists to be supported on the party wall?
Thanks.


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 Post subject: Re: Shared floor joist
PostPosted: Thu Jun 21, 2018 11:00 pm 
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Sounds like the sort of thing that really needs to be looked at on site . Your builder , assuming he is competent, would probably be the best person to advise although it might be even better to consult a structural engineer . It's diffficult to say the least to give any opinion based just on what you describe . Pictures might help although there are a number of questions that spring to mind , for instance what space is being lost below the floor when or if it is lowered?


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 Post subject: Re: Shared floor joist
PostPosted: Mon Jun 25, 2018 4:18 pm 
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yes you can cut shared joists - are you sure they are shared and not just joist tails sitting in the wall?
do you have masonry walls on both sides of the bathroom because if you have a stud partition on one side then things might need dealing with diferently.
given a Victorian party wall of maybe 112mm it would be best to bolt a ledger to the walls and pin joist hangers to the ledger?
cut out the in place joists close to the walls and you can reuse them again in the lowered floor.
use a reciprocating saw to cut the joists.

as already said theres lots of other things to take into account such as WC new soil pipe connections etc


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