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. 1.Not more than 20 percent of the handrail length is obstructed;
  2. 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. 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. 1.Extensions are not required for continuous handrails at the inside turn of switchback or dogleg stairs and ramps.
  2. 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. 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.

505.10.3 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.