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I too agree with **mark handler**, ...an elevator is not required if less than
4 stories, and using the IBC.
From the `12 IBC, Section 1007.3 - Stairways:
In order to be considered part of an accessible means of egress, a stairway
between stories shall have a clear width of 48 inches (1219 mm) minimum
between handrails and shall either incorporate an area of refuge within an
enlarged floor-level landing or shall be accessed from either an area of
refuge complying with Section 1007.6, or a horizontal exit.............Exit access
stairways that connect levels in the same story are not permitted as
part an accessible means of egress.
Exceptions:
1. The clear width of 48 inches (1219 mm) between handrails
is not required in buildings equipped throughout with an automatic
sprinkler system installed in accordance with Section 903.3.1.1,
or 903.3.1.2.
2. Areas of refuge are not required at stairways in buildings
equipped throughout by an automatic sprinkler system installed
in accordance with Section 903.3.1.1 or 903.3.1.2.
3. The clear width of 48 inches (1219 mm) between handrails is
not required for stairways accessed from a horizontal exit.
4. Areas of refuge are not required at stairways serving open
parking garages.
5. Areas of refuge are not required for smoke protected seating
areas complying with Section 1028.6.2.
6. The areas of refuge are not required in Group R-2 occupancies.
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