My local Building Inspector asked that I upgrade to 60 minutes fire resistance between a pair of maisonettes, as the back yard is too small to be a 'place of safety' for the rear-facing bedrooms. (I would be incorporating an extra bedroom at the back of each maisonette.)
I want to move the soil stack inside but it would penetrate a 60 minute rated fire retarding ceiling. I would be enclosing all the waste plumbing in a service enclosure but the soil, water and gas would have to run between floors. I am hoping to conceal the toilet cistern and shower controls in the same service enclosure. Basically, there will be numerous penetrations into this enclosure.
How will it be possible to maintain 60 minutes of fire resistance between the maisonettes?
I want to move the soil stack inside but it would penetrate a 60 minute rated fire retarding ceiling. I would be enclosing all the waste plumbing in a service enclosure but the soil, water and gas would have to run between floors. I am hoping to conceal the toilet cistern and shower controls in the same service enclosure. Basically, there will be numerous penetrations into this enclosure.
How will it be possible to maintain 60 minutes of fire resistance between the maisonettes?