Notches over holes?

S

Starship_Toby

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Hi,

Just a quick question regarding notches in floor joists...

My plumber plans to run pipes in the floor joists above existing holes where the electrics run. As shown in the photo. Is this acceptable?

I’m certainly no expert in anything DIY but something told me it’s not right.

Hopefully I’m probably panicking about nothing!
 

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Why have isolation valves under the floor, out of interest?
 
Is that notch in the centre of the joist or near the edge where it bears on a wall?

Nozzle
 
hmmm... 3 issues there IMO.

1. do not use ISO's in an area that isn't easily accessible, just asking for trouble
2. compression fittings under a floor are not a professional approach
3. That large a notch above an already drilled joist is a no no. Notch shouldn't be more than 1/4 the depth of the joist.

Notches and hole are meant to be cut into different parts of a joist, holes in the centre, notches at the ends
 
Just as an addition, will your house fall down .... probably not .... will the joist fail ..... probably not. It just isn't good practice.
 
what is the unsupported span under those joists if its a small span it may be less off a problem ??
 
Just to clarify on the image...

I believe the valves are temporary. Once the room is refurbished the pipes will continue through more notches to feed radiators.

The elbows connect on to very old pipes which I’m told are a much thicker copper.

The notches are 45cm from the wall and the joist span is 4m.

Thanks for the comments.
 
Google the building regs diagram for joist notches/holes...what you have there is a bodge and non compliant.
Building regs aren't optional.
 
You could see that sort of thing & worse in many houses. If you have concerns ask him to strengthen it with metal plates/brackets.
 
D

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