Rooftop Amenity / assembly space and Construction Type

[Francis Vineyard]

508.2.2 Allowable building height. The allowable height and number of stories of the building containing accessory occupancies shall be in accordance with Section 504 for the main occupancy of the building.
In other words the building as a whole for R-2 can be 5 stories.

508.2.1 Occupancy classification. Accessory occupancies shall be individually classified in accordance with Section 302.1. The requirements of this code shall apply to each portion of the building based on the occupancy classification of that space.

508.2.1 permits or limits the accessory occupancy, A-3 shall be compliance with height for A-3 which is 4 stories.

 

[ETThompson]

508.2.2 Allowable building height. The allowable height and number of stories of the building containing accessory occupancies shall be in accordance with Section 504 for the main occupancy of the building.
In other words the building as a whole for R-2 can be 5 stories.

508.2.1 Occupancy classification. Accessory occupancies shall be individually classified in accordance with Section 302.1. The requirements of this code shall apply to each portion of the building based on the occupancy classification of that space.

508.2.1 permits or limits the accessory occupancy, A-3 shall be compliance with height for A-3 which is 4 stories.

Right, so if I'm understanding this correctly, RLGA's comment (the 1,200sf rooftop amenity space) does not work in my project, because even though it's under 10% and thus an accessory occupancy, it still has to be considered A-3 for height and stories, and A-3 does not work on the 5th floor above the podium in Type IIA construction.

 

[Francis Vineyard]

Sorry for the previous non-answer, didn't read it thoroughly (not a mixed occupancy).

Q. For the "Accessory" provision in 508.2, do I consider the 1,200 sf amenity space as R-2 or A-3 for purposes of height and stories?

A. The building height with an accessory occupancy of A-3, can be the same as the main occupancy R-2 i.e. 5 stories.

It's just that other conditions for A-3 are applicable (maximum floor area even though it may be less than 10% or R-2, fire sprinkler, egress).

 

[ETThompson]

OK thank you. That gives us a little more flexibility. I appreciate the response.