EXCEPTIONS: | 1. Traction power substation (TPSS) when located in a transformer vault designed in accordance with the NFPA 70. 2. Other high voltage equipment located in a transformer vault designed in accordance with the NFPA 70 when approved by the fire code official. 3. Fire command centers, communication room(s), and signal rooms when protected with clean agent fire suppression and separated from other spaces with 2-hour fire rated construction. 4. Other operational critical rooms when protected with clean agent fire suppression and separated from other spaces with 2-hour fire rated construction, when approved by the fire code official. |
EXCEPTIONS: | 1. Stations at grade with less than 1,500 sq. ft. of ancillary area/ancillary space. 2. Fire command centers, communication room(s), and signal rooms when protected with clean agent fire suppression and separated from other spaces with 2-hour fire rated construction. 3. Other operational critical rooms when protected with clean agent fire suppression and separated from other spaces with 2-hour fire rated construction, when approved by the fire code official. |
Table 5.2.2.1
Minimum Construction Requirements for New Station Structures
Station Configuration | Construction Type[DAGER] |
Stations erected entirely above grade and in a separate building: | |
Open stations | Type IIB |
Enclosed stations | Type IIA |
Stations erected entirely or partially below grade: | |
Open above grade portions of below grade structures* | Type IIA |
Below grade portions of structures | Type IB |
Below grade structures with occupant loads exceeding 1000 | Type IA |
* Roofs not supporting an occupancy above are not required to have a fire resistance rating.
[DAGER] Construction types are in accordance with the International Building Code.
Wash. Admin. Code § 51-54A-4900