Does "adjoining" include the case of "lower" superimposed occupancy?

[sunyaer]

This is a test question and the answer is A:


The answer use this:



Shall 3.2.2.7.(2) be applied in cases where the residential occupancy is below the merchandise occupancy? When 3.2.2.7.(2) is applied, is 3.1.3.1.(1) still needed to check for the most restrictive requirement?

 

[tmurray]

Yes. Adjoining is beside or above and below.

Yes. The most restrictive requirement between 3.1.3.1. and the 3.2.2. classification applies.

3.1.3.1. deals with the risk one occupancy poses to an adjacent occupancy.

3.2.2. deals with the risks an occupancy poses to the building as a whole.

 

[sunyaer]

Yes. Adjoining is beside or above and below.

Yes. The most restrictive requirement between 3.1.3.1. and the 3.2.2. classification applies.

3.1.3.1. deals with the risk one occupancy poses to an adjacent occupancy.

3.2.2. deals with the risks an occupancy poses to the building as a whole.

If adjoining already includes below, what is 3.2.2.7.(2) (see screenshot above) there for?

 

[tmurray]

If adjoining already includes below, what is 3.2.2.7.(2) (see screenshot above) there for?

It's indicating the governing rating of the fire separation from the perspective of 3.2.2. The logic is that the 3.2.2. ratings are based on the fire load and where the code indicates that floors are rated for fires from below, it makes sense to apply the rating to the floor assembly immediately above a certain area.

 

[sunyaer]

It's indicating the governing rating of the fire separation from the perspective of 3.2.2. The logic is that the 3.2.2. ratings are based on the fire load and where the code indicates that floors are rated for fires from below, it makes sense to apply the rating to the floor assembly immediately above a certain area.

Please confirm if I am doing it right?

When one major occupancy is above another major occupancy, in order to decide on the required rating of the floor assembly between these two major occupancies, do these two steps:
1. Use 3.1.3.1.(1) and the table 3.1.3.1. to get the require rating 1;
2. Use 3.2.2.7. (2) to get the required rating 2

compare the two required rating 1 and 2 from step 1 and 2, use the higher rating.

 

[tmurray]

Please confirm if I am doing it right?

When one major occupancy is above another major occupancy, in order to decide on the required rating of the floor assembly between these two major occupancies, do these two steps:
1. Use 3.1.3.1.(1) and the table 3.1.3.1. to get the require rating 1;
2. Use 3.2.2.7. (2) to get the required rating 2

compare the two required rating 1 and 2 from step 1 and 2, use the higher rating.

You've got it.