13R sprinklers in parking garage

[Mr. Inspector]

2018 IBC & IEBC. Just need a confirmation. Change of occupancy and alterations. Sprinkler plans indicates a 13R system for a R-1 (on second floor) and a S2 enclosed private parking garage on the first floor. Both floors are 5,520 sq ft. The parking garage will have a dry system because it is not heated. I'm I right that the whole building is to have a 13 system, not a 13R system per #2 below?

[F] 903.2.10 Group S-2 enclosed parking garages. An
automatic sprinkler system shall be provided throughout
buildings classified as enclosed parking garages in accordance
with Section 406.6 where either of the following
conditions exists:
1. Where the fire area of the enclosed parking garage
exceeds 12,000 square feet (1115 m2).
2. Where the enclosed parking garage is located
beneath other groups.
Exception: Enclosed parking garages located
beneath Group R-3 occupancies.

 

[steveray]

As the "S" drives the sprinklers....It cannot generally be an "R" system.....

 

[mtlogcabin]

It could be a "U" occupancy and not an "S-2" if you meet the following
2018 IBC


406.3 Private garages and carports.
Private garages and carports shall comply with Sections 406.2 and 406.3, or they shall comply with Sections 406.2 and 406.4.

406.3.1 Classification.
Private garages and carports shall be classified as Group U occupancies. Each private garage shall be not greater than 1,000 square feet (93 m2) in area. Multiple private garages are permitted in a building where each private garage is separated from the other private garages by 1-hour fire barriers in accordance with Section 707, or 1-hour horizontal assemblies in accordance with Section 711, or both.

406.3.2 Separation.
For other than private garages adjacent to dwelling units, the separation of private garages from other occupancies shall comply with Section 508. Separation of private garages from dwelling units shall comply with Sections 406.3.2.1 and 406.3.2.2.

406.3.2.1 Dwelling unit separation.
The private garage shall be separated from the dwelling unit and its attic area by means of gypsum board, not less than 1/2 inch (12.7 mm) in thickness, applied to the garage side. Garages beneath habitable rooms shall be separated from all habitable rooms above by not less than a 5/8- inch (15.9 mm) Type X gypsum board or equivalent and 1/2-inch (12.7 mm) gypsum board applied to structures supporting the separation from habitable rooms above the garage. Door openings between a private garage and the dwelling unit shall be equipped with either solid wood doors or solid or honeycomb core steel doors not less than 13/8 inches (34.9 mm) in thickness, or doors in compliance with Section 716.2.2.1 with a fire protection rating of not less than 20 minutes. Doors shall be self-closing and self-latching.

406.3.2.2 Ducts.
Ducts in a private garage and ducts penetrating the walls or ceilings separating the dwelling unit from the garage, including its attic area, shall be constructed of sheet steel of not less than 0.019 inch (0.48 mm) in thickness and shall not have openings into the garage.

 

[khsmith55]

Maybe 13R throughout, refer to 2019 13R Section 7.3.1 Design criteria-Garages. Look further at Section 7.3.2.

 

[steveray]

 

[steveray]

[F] 903.3.1.2 NFPA 13R Sprinkler Systems​

Diagram
Automatic sprinkler systems in Group R occupancies shall be permitted to be installed throughout in accordance with NFPA 13R where the Group R occupancy meets all of the following conditions:

1. Four stories or fewer above grade plane.
2. The floor level of the highest story is 30 feet (9144 mm) or less above the lowest level of fire department vehicle access.
3. The floor level of the lowest story is 30 feet (9144 mm) or less below the lowest level of fire department vehicle access.

And see post #2

 

[Mr. Inspector]

It could be a "U" occupancy and not an "S-2" if you meet the following
2018 IBC


406.3 Private garages and carports.
Private garages and carports shall comply with Sections 406.2 and 406.3, or they shall comply with Sections 406.2 and 406.4.

406.3.1 Classification.
Private garages and carports shall be classified as Group U occupancies. Each private garage shall be not greater than 1,000 square feet (93 m2) in area. Multiple private garages are permitted in a building where each private garage is separated from the other private garages by 1-hour fire barriers in accordance with Section 707, or 1-hour horizontal assemblies in accordance with Section 711, or both.

406.3.2 Separation.
For other than private garages adjacent to dwelling units, the separation of private garages from other occupancies shall comply with Section 508. Separation of private garages from dwelling units shall comply with Sections 406.3.2.1 and 406.3.2.2.

406.3.2.1 Dwelling unit separation.
The private garage shall be separated from the dwelling unit and its attic area by means of gypsum board, not less than 1/2 inch (12.7 mm) in thickness, applied to the garage side. Garages beneath habitable rooms shall be separated from all habitable rooms above by not less than a 5/8- inch (15.9 mm) Type X gypsum board or equivalent and 1/2-inch (12.7 mm) gypsum board applied to structures supporting the separation from habitable rooms above the garage. Door openings between a private garage and the dwelling unit shall be equipped with either solid wood doors or solid or honeycomb core steel doors not less than 13/8 inches (34.9 mm) in thickness, or doors in compliance with Section 716.2.2.1 with a fire protection rating of not less than 20 minutes. Doors shall be self-closing and self-latching.

406.3.2.2 Ducts.
Ducts in a private garage and ducts penetrating the walls or ceilings separating the dwelling unit from the garage, including its attic area, shall be constructed of sheet steel of not less than 0.019 inch (0.48 mm) in thickness and shall not have openings into the garage.

Garage is too big to use this

 

[Mr. Inspector]

So it looks like 13 system for the garage and 13R for the R1second floor.
There will be a stairway and elevator from the 2nd floor to the 1st floor and exit. This area will be part of the R1 occupancy and will be separated from the garage by a 1 hr wall. Will this stairway need standpipes per 905.4?