N/A in major occupancy fire separation table

[sunyaer]

This table is from Ontario Building Code:

3.1.3. Multiple Occupancy Requirements
3.1.3.1. Separation of Major Occupancies

Are the "N/A" circled in red for combination of major occupancy not allowed? Where in the code is there more information about this?

 

[Inspector Gadget]

I do not think that table is helping you much. NBC is more clear. See the footnotes and the following Code.
In the table below, - indicates that there is no minimum fire-resistance rating *under this table*. Naturally, two adjoining "C" occupancies require fire separations, but that's covered elsewhere.

Welcome to Part 3: it's a beast of a learning curve.

 

[sunyaer]

...
In the table below, - indicates that there is no minimum fire-resistance rating *under this table*.
...

Where is this?

 

[sunyaer]

So my questions are actually: where there are F-2 (or F-3) and D (or E) major occupancy in a building, what is the required fire separation rating between them?

 

[cda]

??????????

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[tmurray]

If "N/A" is listed in the table, there does not need to be a fire resistance rating between the occupancies because one is not a greater safety risk than the other. Keep in mind that there may still be rated separations required under 3.3 and that the separations between occupancies continue to be fire separations, they are just unrated (smoke seal).

 

[Inspector Gadget]

Where is this?

NBC 2015.

 

[sunyaer]

If "N/A" is listed in the table, there does not need to be a fire resistance rating between the occupancies because one is not a greater safety risk than the other. Keep in mind that there may still be rated separations required under 3.3 and that the separations between occupancies continue to be fire separations, they are just unrated (smoke seal).

Is this applying? The fire separation is not just smoke seal, correct?

 

[tmurray]

Yes, the building must meet both of these requirements.

All fire separations are a smoke seal, but not all fire separations have a fire resistance rating.