Firestopping/penetrations - Part 3

[Inspector Gadget]

Little discussion I want another opinion on.

Part 3 construction. Drain pipe for a sink goes through ONE side of a party wall.
3.1.9.4
3) Except as permitted by Sentences (4), (5), (7) and (8), combustible piping shall
not be used in a drain, waste and vent piping system if any part of that system
penetrates
a) a fire separation required to have a fire-resistance rating, or

Clause 5
5) Combustible drain, waste and vent piping is permitted on one side of a vertical
fire separation provided it is not located in a vertical service space.

So ... if I have a sink drain that penetrates one side of a party wall, does it require fire stopping or not?

 

[steveray]

I'd say yes, but I do not know what a "vertical service space" is....

 

[Yankee Chronicler]

In U.S. terminology, this is what's known as a "membrane penetration" (penetrates one side -- one membrane -- of the assembly but not both sides). If the assembly is rated, the membrane penetration requires a listed penetration seal assembly -- which is different from a through penetration assembly.

 

[steveray]

In U.S. terminology, this is what's known as a "membrane penetration" (penetrates one side -- one membrane -- of the assembly but not both sides). If the assembly is rated, the membrane penetration requires a listed penetration seal assembly -- which is different from a through penetration assembly.

Multitasking I see...LOL

 

[Yankee Chronicler]

Multitasking I see...LOL

 

[Inspector Gadget]

I'd say yes, but I do not know what a "vertical service space" is....

In Canuckian terms - it's a fire-rated assembly that runs vertically through horizontal fire separations; building services run through the vertical service space must (usually) be fire-stopped at the low penetration point unless it's something like a pipe through a ground-floor slab, and also at the upper penetration point.

 

[redeyedfly]

In Canuckian terms - it's a fire-rated assembly that runs vertically through horizontal fire separations; building services run through the vertical service space must (usually) be fire-stopped at the low penetration point unless it's something like a pipe through a ground-floor slab, and also at the upper penetration point.

so a "shaft"?

 

[Yankee Chronicler]

In Canuckian terms - it's a fire-rated assembly that runs vertically through horizontal fire separations; building services run through the vertical service space must (usually) be fire-stopped at the low penetration point unless it's something like a pipe through a ground-floor slab, and also at the upper penetration point.

So it's what we in the colonies call a "shaft"?

 

[tmurray]

So it's what we in the colonies call a "shaft"?

View attachment 16827

Just this colony. Not sure about the others. Looks similar. Here is our definition.

Vertical service space means a shaft oriented essentially vertically that is provided in
a building to facilitate the installation of building services including mechanical,
electrical and plumbing installations and facilities such as elevators, refuse chutes
and linen chutes.

 

[tmurray]

Little discussion I want another opinion on.

Part 3 construction. Drain pipe for a sink goes through ONE side of a party wall.
3.1.9.4
3) Except as permitted by Sentences (4), (5), (7) and (8), combustible piping shall
not be used in a drain, waste and vent piping system if any part of that system
penetrates
a) a fire separation required to have a fire-resistance rating, or

Clause 5
5) Combustible drain, waste and vent piping is permitted on one side of a vertical
fire separation provided it is not located in a vertical service space.

So ... if I have a sink drain that penetrates one side of a party wall, does it require fire stopping or not?

These clauses control the combustibility of the piping.

(3) makes it so you can't use combustible pipe for plumbing systems in a vertical service space.

(5) makes an exception that you can have combustible piping penetrate a fire separation that is not a vertical service space on one side only. Theoretically you could penetrate the other side with non-combustible piping.

Also note that there are restrictions on transitioning between combustible and non-combustible piping in relation to the fire separation/vertical service space.

3.1.9.1. and 3.1.9.2. would contain the requirements for fire stopping.