Not as long as the membrane penetrations are properly protected.any problem where the bathrooms in adjoing units are back to back, and the plumbing is in the one hour wall, for both units???
Isn't there also a section in the NEC for back to back electrical too?mtlogcabin said:Not as long as the membrane penetrations are properly protected.Another note
If the plumbing sink drains are back to back then that may be considered a through penetration and would need to be protected accordingly
north star said:* * * *cda,
For clarity, there is a fully rated 1 hr. wall on each side of
the plumbing space cavity, with no penetrations?
Any kind of penetrations in to the rated assembly [ i.e -
electrical, mechanical, thermal insulation, lighting,
other ]?
* * * *
Yep not doing a 3.3.1.1 systemiggentleman said:I assume that you can't take advantage of 709.3 exception 2 (IBC 2009) to drop the 1 hour rating to 1/2 hour?
I think I used the wrong termBuilder Bob said:I believe that the back to back configuration may cause the plumbing to be incorrectly installed === Back to Back weirs will cause a surge ( My crap is now your crap)when somebody flushes or if a party drains a tub.....
Yes, see Article 300.21 [ `08 NEC ] - Spread of Fire or Products"Isn't there also a section in the NEC for back to back electrical too?"