Do these corridor walls need to be rated?

[Ryan Schultz]

In the situation like the following, in a non-sprinklered 2 story, (B) building, do the corridor walls need to be rated? It has a basement, as well.

My thinking that since each space is less than 50 occupants, they only need one exit--which the stair egress satisfies. So the corridor is not really a 'exit access'.

Would this be a correct interpretation?

 

[Ryan Schultz]

looking at this closer, i think that corridor needs to be rated since Table 1006.3.2(2) is not satisfied. That is 49>29.

For the sake of education, however, what if the office suites were less than 29 occupants?

 

[RLGA]

Stories, regardless of occupant load, are required to give occupants access to two means of egress. Unless occupants can egress through the other tenant space, the center stair is a required means of egress.

If the building is sprinklered, the corridor is not required to be rated. If it is not sprinklered, the corridor is required to be rated.

 

[Ryan Schultz]

Thanks @RLGA
Doesn't TABLE 1006.3.2(2) allow stories above to have one exit? That is, if the values for maximum occupant load per story and maximum common path of
egress travel distance are satisfied.

My example above doesn't satisfy this, but just wanted to ask the question nonetheless.

 

[RLGA]

Thanks @RLGA
Doesn't TABLE 1006.3.2(2) allow stories above to have one exit? That is, if the values for maximum occupant load per story and maximum common path of
egress travel distance are satisfied.

My example above doesn't satisfy this, but just wanted to ask the question nonetheless.

Yes, but to have a single-exit story, the story is limited to 49 occupants--you show at least 98 occupants (you have to count the occupant load in the corridor, too).

If each of those tenant spaces had no access to the central stair, the corridor, or the other tenant space, you could effectively justify a single-exit stairway for each tenant.

 

[steveray]

Agreed.

 

[JPohling]

Or if the occupant load using the central stair would be less than 30 occupants the corridor would not need to be rated