Sanitary pipe penetration fire stopping

[blugosi]

Which Code reference deals with sanitary pipes penetrating fire barriers?

A contractor who was supposed to get a pipe through a concrete fire barrier used a 12 foot steel pipe through the wall and then transitioned from steel to PVC without any collars and such.

Obviously this is not permitted because if the plastic pipe melts due to a fire, smoke and flames may pass on the other side of the fire barrier.

Where can I find a reference for such transitions?

 

[Gregg Harris]

(b) Noncombustible pipes and conduits. Noncombustible pipes and conduits may pass through construction required to have a fire-resistance rating provided that the space between the pipe or conduit and its sleeve or opening does not exceed one-half inch and is completely packed with mineral wool or equivalent noncombustible material and is closed off by close-fitting metal escutcheons on both sides of the construction; and provided further that the aggregate net area of such openings does not exceed twenty-five square inches in any one hundred square feet of wall or floor area (excluding the areas of openings for sleeves which are firestopped in conformance with this section and section 27-345)

 

[Gregg Harris]

NFPA 221

 

[blugosi]

NFPA 221

This is one relevant NFPA 221 reference.

4.10.6 Transitions.
4.10.6.1
Where piping penetrates a fire-resistance-rated wall assembly, combustible piping shall not connect to noncombustible piping within 36 in. (915 mm) of the firestop system or device, unless it can be demonstrated that the transition will not reduce the fire resistance rating.
4.10.6.2
Unshielded couplings shall not be used to connect noncombustible piping to combustible piping, unless it can be demonstrated that the transition complies with the fire-resistive protection requirements of 4.10.2 and 4.10.2.1.

And where can we find the exception for domestic water pipes penetrating rated slabs?

 

[Gregg Harris]

This is one relevant NFPA 221 reference.

4.10.6 Transitions.
4.10.6.1
Where piping penetrates a fire-resistance-rated wall assembly, combustible piping shall not connect to noncombustible piping within 36 in. (915 mm) of the firestop system or device, unless it can be demonstrated that the transition will not reduce the fire resistance rating.
4.10.6.2
Unshielded couplings shall not be used to connect noncombustible piping to combustible piping, unless it can be demonstrated that the transition complies with the fire-resistive protection requirements of 4.10.2 and 4.10.2.1.

And where can we find the exception for domestic water pipes penetrating rated slabs?

Same section

 

[jj1289]

2024 IBC section 714.4
Penetrations into or through fire walls, fire barriers, smoke barrier walls and fire partitions shall comply with Sections 714.4.1 through 714.4.3. Penetrations in smoke barrier walls shall also comply with Section 714.5.4.

2024 IPC, section 315.1
The annular space between the outside of a pipe and the inside of a pipe sleeve or between the outside of a pipe and an opening in a building envelope wall, floor, or ceiling assembly penetrated by a pipe shall be sealed in an approved manner with caulking material, foam sealant or closed with a gasketing system. The caulking material, foam sealant or gasketing system shall be designed for the conditions at the penetration location and shall be compatible with the pipe, sleeve and building materials in contact with the sealing materials. Annular spaces created by pipes penetrating fire-resistance-rated assemblies or membranes of such assemblies shall be sealed or closed in accordance with Section 714 of the International Building Code.