Pressure-treated floor joists?

[VLJ]

Hello,

I am preparing for a laundry room in the mudroom and discovered when I removed the subfloor that the floor joists appear to be pressure-treated. The extension is from the 70s, so I knew that the soleplates often were, but I hadn't thought that the entire joist system was. Is there any reason to replace it if we don't have issues with odor and it is in good condition otherwise?

 

[sturnus]

Bjälken verkar vara målad med fungicide, inte NTR enligt min åsikt

 

[VLJ]

It looks superficial, so that might suggest it's something that's been painted on, but I have no idea what such old impregneration looks like.

 

[Jonatan79]

It is probably treated with cuprinol, not dangerous or smelly as long as it doesn't get wet.

 

[VLJ]

Follow-up question: Is there any potential risk of screwing and gluing untreated studs to this so that Cuprinol ends up in between? I've encountered some problems (see the project thread https://www.byggahus.se/forum/threads/projekt-kompakt-tvaettstuga.482512/#post-5147263)

It shouldn't be, of course, since the subfloor has been nailed against it without any visible impact.