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CHAPTER 5: GENERAL SITE AND BUILDING ELEMENTS
501 General
501.1 Scope. General site and building elements
required to be accessible by Chapter 2 shall comply with the applicable
provisions of this chapter.
502 Parking Spaces
502.1 General. Car and van parking spaces required
to be accessible shall comply with 502.
502.2 Vehicle Spaces. Car and van parking spaces
shall be 96 inches (2440 mm) wide minimum and shall have an adjacent access aisle
complying with 502.3.
502.3 Access Aisle, Access aisles serving parking
spaces shall comply with 302 and 502.3.1 through 502.3.3. Access aisles shall
adjoin an accessible route. Two parking spaces shall be permitted to share a common
access aisle.
502.3.1 Width. Access aisles serving car parking
spaces shall be 60 inches (1525 mm) wide minimum. Access aisles serving van parking
spaces shall be 96 inches (2440 mm) wide minimum.
502.3.2 Length. Access aisles shall extend the
full length of the parking spaces they serve.
502.3.3 Marking. Access aisles shall be marked
so as to discourage parking in them.
502.4 Floor or Ground Surfaces. Parking spaces
and access aisles serving them shall have surface slopes not steeper than 1 :48
in all directions. Changes in level are not permitted. Access aisles shall be
at the same level as the parking spaces they serve.
502.5 Vertical Clearance. Van parking spaces,
access aisles serving them and a vehicular route to van parking spaces shall provide
a vertical clearance of 98 inches (2490 mm) minimum.
502.6 Identification. Where accessible parking
spaces are required to be identified by signs, the signs shall include the international
Symbol of Accessibility complying with 703.7. Such signs shall be 60 inches
(1525 mm) minimum above the floor or ground surface measured to the bottom of
the sign.
503 Passenger Loading Zones
503.1 General. Passenger loading zones required
to be accessible shall comply with 503.
503.2 Vehicle Pull-up Space. Passenger loading
zones shall provide a vehicular pull-up space 96 inches (2440 mm) minimum in width,
20 feet (6100 mm) minimum in length and an adjacent access aisle complying with
503.3.
503.3 Access Aisle. Access aisles serving passenger
loading zones shall comply with 302 and 503.3.1 through 503.3.3. Access
aisles shall adjoin an accessible route.
503.3.1 Width. Access aisles serving vehicle
pull-up spaces shall be 60 inches (1525 mm) wide minimum.
503.3.2 Length. Access aisles shall be 20 feet
(6100 mm) minimum in length and shall extend the full length of the vehicle pull-up
spaces they serve.
503.3.3 Marking. Access aisles shall be marked
so as to discourage parking in them.
503.4 Floor and Ground Surfaces. Vehicle pull-up
spaces and access aisles serving them shall have surface slopes not steeper than
1:48. Changes in level are not permitted. Access aisles shall be at the same level
as the vehicle pull-up space they serve.
503.5 Vertical Clearance. Vehicle pull-up spaces.
access aisles serving them and a vehicular route to the passenger loading zone
shall provide a vertical clearance of 114 inches (2895 mm) minimum.
504 Stairways
504.1 General. Stairs required to be accessible
shall comply with 504.
504.2 Treads and Risers. All steps on a flight
of stairs shall have uniform riser heights and uniform tread depths. Risers shall
be 4 inches (100 mm) minimum in height and 7 inches (180 mm) maximum in height.
Treads shall be 11 inches (280 mm) minimum in depth, measured from riser to riser.
504.3 Open risers. Open risers are not permitted.
504.4 Tread Surface. Stair treads shall comply
with 302. Treads shall have a slope not steeper than 1:48. Changes in level are
not permitted.
504.5 Nosings. The radius of curvature at the
leading edge of the tread shall be 1/2 inch (13 mm) maximum. Nosings that project
beyond vertical risers shall have the underside of the leading edge curved or
beveled. If not vertical, risers shall slope under the tread at an angle of 30
degrees maximum from vertical; however, the permitted projection of the nosing
shall be 1-1/2 inches (38 mm) maximum beyond the rear of the tread below.
504.6 Handrails. Stairs shall have handrails
complying with 505.
504.7 Outdoor Conditions. Outdoor stairs and
outdoor approaches to stairs shall be designed so that water will not accumulate
on walking surfaces.
505 Handrails
505.1 General. Handrails required by 405 at ramps
or 504 at stairs shall comply with 505.
505.2 Where Required. Handrails shall be provided
on both sides of stairs and ramps.
EXCEPTION: Handrails are not required on both sides of aisle stairs and aisle ramps provided with a handrail at either side or within the aisle width.
505.3 Continuity. Handrails shall be continuous
within the full length of each stair flight or ramp run.
EXCEPTION: Handrails are not required to be continuous in aisles serving seating.
505.4 Height. Top of gripping surfaces of handrails
shall be 34 inches (865 mm) minimum and 38 inches (965 mm) maximum vertically
above stair nosings and ramp surfaces. Handrails shall be at a consistent height
above stair nosings and ramp surfaces.
505.5 Clearance. Clearance between handrail and
wall shall be 1-1/2 inches (38 mm) minimum.
505.6 Gripping Surface. Gripping surfaces shall
be continuous, without interruption by newel posts. other construction elements,
or obstructions.
EXCEPTION: Handrail brackets or balusters attached to the bottom surface of the handrail shall not be considered obstructions provided they comply with the following:
1. Not more than 20 percent of the handrail length is obstructed;
2. Horizontal projections beyond the sides of the handrail occur 2-1/2 inches (64 mm) minimum below the bottom of the handrail, and
3. Edges have a 1/8 inch (3.2 mm) minimum radius.
505.7 Cross Section. Handrails shall have a circular
cross section with an outside diameter of 1-1/4 inches (32 mm) minimum and 2 inches
(51 mm) maximum, or shall provide equivalent graspability in accordance with 505.7.1.
505.7.1 Non-Circular Cross Sections. Non- circular
cross sections shall have a perimeter dimension of 4 inches (100 mm) minimum and
6-1/4 inches (160 mm) maximum, and a cross-section dimension of 2-1/4 inches (57
mm) maximum.
505.8 Surfaces. Handrails and any wall or other
surfaces adjacent to them shall be free of any sharp or abrasive elements. Edges
shall have a 1/8 inch (3.2 mm) minimum radius.
505.9 Fittings. Handrails shall not rotate within
their fittings.
505.10 Handrail Extensions. Handrails shall extend
beyond stair runs and ramp runs in accordance with 505.10.1 through 505.10.3.
EXCEPTIONS:
1. Extensions are not required for continuous handrails at the inside turn of switchback or dogleg stairs and ramps.
2. Extensions are not required for handrails in aisles serving seating where the handrails are necessarily discontinuous to provide access to seating and to permit crossovers within the aisle.
3. In alterations, full extension of handrails shall not be required where such extensions would be hazardous or impossible due to plan configuration.
505.10.1 Top and Bottom Extension at Ramps. Ramp
handrails shall extend horizontally above the landing for 12 inches (305 mm) minimum
beyond the top and bottom of ramp runs. Such extension shall return to a wall,
guard or the walking surface or shall be continuous to the handrail of an adjacent
ramp run.
505.10.2 Top Extension at Stairs. At the top
of a stair flight, handrails shall extend horizontally above the landing for 12
inches (305 mm) minimum beginning directly above the first riser nosing. Such
extension shall return to a wall, guard or the walking surface or shall be continuous
to the handrail of an adjacent stair flight.
503.10.3 Bottom Extension at Stairs. At the bottom
of a stair flight, handrails shall extend at the slope of the stair flight for
a horizontal distance equal to one tread depth beyond the last riser nosing and
an additional 12 inches (305 mm) minimum horizontally at a height equal to that
of the sloping portion of the handrail as measured above the stair nosings. Such
extension shall return to a wall. guard or the walking surface or shall be continuous
to the handrail of an adjacent stair flight.
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