OPENING PROTECTIVES for > 3 stories Exit Stair (NFPA 101 Table 8.3.4.2).
(Applicable to all occupancy type except one and two family dwelling)
COMPONENT WALLS AND PARTITIONS FIRE DOOR ASSEMBLIES DOOR VISION PANEL MAXIMUM SIZE FIRE WINDOW ASSEMBLIES
Staircase and Vertical Shafts 1-hr 1-hr Maximum size tested W-60
The Exit Separation shall have not less than a 1-hour fire resistance rating where the exit connects three stories or less, NFPA 101 - 7.1.3.2.1 (1)

Notes: