CHAPTER 4: ACCESSIBLE ROUTES
TECHNICAL
by reference, see “Referenced Standards” in Chapter 1).
Low-energy and power-assisted doors shall
comply with ANSI/BHMA A156.19 (1997 or 2002 edition) (incorporated by reference, see “Referenced
Standards” in Chapter 1).
404.3.1 Clear Width.
Doorways shall provide a clear opening of 32 inches (815 mm) minimum in
power-on and power-off mode.
The minimum clear width for automatic door systems in a doorway
shall be based on the clear opening provided by all leaves in the open position.
404.3.2 Maneuvering Clearance.
Clearances at power-assisted doors and gates shall comply with
404.2.4.
Clearances at automatic doors and gates without standby power and serving an
accessible
means of egress
shall comply with 404.2.4.
EXCEPTION:
Where automatic doors and gates remain open in the power-off condition,
compliance with 404.2.4 shall not be required.
404.3.3 Thresholds.
Thresholds and changes in level at doorways shall comply with 404.2.5.
404.3.4 Doors in Series and Gates in Series.
Doors in series and gates in series shall comply with
404.2.6.
404.3.5 Controls.
Manually operated controls shall comply with 309.
The clear floor
space
adjacent
to the control shall be located beyond the arc of the door swing.
404.3.6 Break Out Opening.
Where doors and gates without standby power are a part of a means
of egress, the clear break out opening at swinging or sliding doors and gates shall be 32 inches (815
mm) minimum when operated in emergency mode.
EXCEPTION:
Where manual swinging doors and gates comply with 404.2 and serve the same
means of egress compliance with 404.3.6 shall not be required.
404.3.7 Revolving Doors, Revolving Gates, and Turnstiles.
Revolving doors, revolving gates,
and turnstiles shall not be part of an
accessible
route.
405 Ramps
405.1 General.
Ramps
on
accessible
routes shall comply with 405.
EXCEPTION:
In
assembly areas
, aisle
ramps
adjacent to seating and not serving
elements
required
to be on an
accessible
route shall not be required to comply with 405.
405.2 Slope.
Ramp
runs shall have a
running slope
not steeper than 1:12.
EXCEPTION:
In existing
sites
,
buildings
, and
facilities
,
ramps
shall be permitted to have
running
slopes
steeper than 1:12 complying with Table 405.2 where such slopes are necessary due to
space
limitations.
2010 Standards: Titles II and III
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127
Department of Justice