Exit Stair Wall Rating > 3 Stories

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	2-hrs	1.5-hrs	Maximum size tested	W-120

The Exit Separation shall have not less than a 2-hour fire resistance rating where the exit connects four or more stories, NFPA 101 - 7.1.3.2.1 (2)

Notes:

Refer also to complete listing of Opening Protectives.
Code Reference used is NFPA-101 2012 edition unless otherwise noted.
These information is not complete and intended to be used as quick references only, always refer to NFPA or your local codes for complete information.