Do these new joist notches look alright to you?

Discussion in 'Carpenters' Talk' started by Jose17, Jul 13, 2018.

  1. Allsorts

    Allsorts Super Member

    Just make sure they come down before it's covered up. Or, give them a bell and tell them you have a concern and would like reassurance. Or, email them with a photo - it's pretty obvious what's been done.
    Jose17 likes this.
  2. Jose17

    Jose17 New Member

    Looking at the regs and the span, I need 6x2 on 0.25-0.50 kN/m². Now looking at the bath being directly on the notched side, it weighs approx 400kg with water and human. That's approx 4kN/m². Far more then the regs stats for the timber to take...

    I'll get the BCO over and see what they say..
  3. Allsorts

    Allsorts Super Member

    Are you suggesting that the regs on timber joist sizes don't take in to account weird things like 'baths with water and humans in them'?

    What regs are you reading; the one that says "6x2 joists are fine here provided you don't actually breathe on them'? :)
  4. Jose17

    Jose17 New Member

  5. Allsorts

    Allsorts Super Member

    Sorry - I was being flippant.

    What I mean is, you seem to be reading regs for joist sizes, and then you start to think "Oh, what about heavy stuff like baths?! Will it cope?!"

    Anyway, your BCO will - hopefully - put your mind at rest.
    blarblarblarblar likes this.
  6. Mr Rusty

    Mr Rusty Screwfix Select

    It'll be absolutely fine. It's still a 7x2 joist as far as bending moments are concerned. Taking out the top corner makes no difference. As others have said the end of the joist is in shear - it isn't going anywhere. BCO should pass it no problem at all.
    Allsorts likes this.
  7. Jose17

    Jose17 New Member

    Thanks both. I have contacted the local authority to let them know.

    In hindsight I wish I used bigger timber and had the builder pack out the steel... ahh!
  8. chippie244

    chippie244 Super Member

    Your bath must be massive, mine comes out as 200Kg
  9. Jose17

    Jose17 New Member

  10. kitfit1

    kitfit1 Screwfix Select

    Looking at Chips sig pic................i'd put him closer to 100Kg than 50Kg :D
    Allsorts, chippie244 and Jose17 like this.
  11. chippie244

    chippie244 Super Member

    You displace your own weight of water so you can ignore that.
  12. wiggy

    wiggy Screwfix Select

    There are many ways to skin a cat and everyone knows better than the bloke who did the job, its a trait of being a tradesman.

    I can't see anything majorly wrong with the work.

    If you're that concerned get your builder to double up the joists under the bath.

    It is that simple
    Allsorts likes this.
  13. Dr Bodgit

    Dr Bodgit Super Member

    And where is the water displaced - its still in the bath. If a 100kg man gets into a bath with water, its always going to be 100kg heavier unless the water is displaced over the top of the bath onto the floor.
  14. chippie244

    chippie244 Super Member

    It is 300Kg to the overflow, any water displaced goes down said overflow.
    This is very basic plumbing/physics that's been known since Archimedes.
  15. Allsorts

    Allsorts Super Member

    Dr Bodgit meet Chippie. Chippie, Dr Bodgit :)
  16. chippie244

    chippie244 Super Member

    Has HA cloned himself?
  17. Allsorts

    Allsorts Super Member

    Into Dr Bodgit?! Nah - Bodge is cool.

    Into someone else? Almost certainly 'yup'... :)
  18. Dr Bodgit

    Dr Bodgit Super Member

    Well if you fill the bath so water is level with the overflow, then yes.

    Actually, no.

    The amount of water displaced will likely be less than your body weight as you'll be sitting on the bottom of the bath.

    I am not so wasteful with water, so none will go into the overflow.
  19. Allsorts

    Allsorts Super Member

    You don't even do a pee-pee in the bath?

    That's impressive.
  20. Dr Bodgit

    Dr Bodgit Super Member

    Who, me? Certainly not, I grew out of that disgusting habit several weeks ago.
    Jose17 likes this.

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