Enclosure under interior stairways

[VLADIMIR LEVIN]

Can someone clarify section 1011.7.3 BCNYS.
I have a metal stair with a utility closet underneath it.
I think the closet walls need to be 1 hour, and the underside of the stair needs to be 1 hour?

 

[Mr. Inspector]

IBC 101.7.3 says the same thing but also requires it to be at lease the same fire -rated construction as the stairway encloser and the access to the enclosed space cannot be directly from within the stairway encloser.

 

[Yankee Chronicler]

Is the stair an enclosed exit stair, or is it an exit access stair?