Sub-structure
Designs for the sub-structure of a streetary vary and depend on the slope of the street and overall design for the structure. The sub-structure must accommodate the crown of the road and provide a level surface for the streetary. “Bison pedestals” (pictured below) spaced under the surface and of different heights are a common application. Another method is to provide steel sub-structure and angled beams.
ADA Accessibility
SRMC 11.70.100(F): ADA Compliance. Streetary seating areas must, at all times, comply with all requirements of the Americans with Disabilities Act (ADA) and provide sufficient clearance and walkway space to allow safe access and egress. For multi-level streetaries, a minimum of one level of ADA access shall be required.
All accessibility elements of the proposed platform shall be designed, constructed and/or conform to the applicable provisions, rules, regulations and guidelines of the California Building Code and Americans with Disabilities Act.
Accessible Platform Surface
The portion of the streetary platform connected by the accessible path of travel to the wheelchair turning space and wheelchair resting space must be level. The accessible platform surface maximum cross slope (perpendicular to the sidewalk or curb) and running slope (parallel to the curb) cannot exceed two percent (2%).
Dimensions
Accessible entry shall be a minimum of 48 inches wide. Accessible path of travel must connect the sidewalk to the accessible entry, platform surface, wheelchair turning space and wheelchair resting space. Wheelchair turning space shall be 60 inches in diameter and located entirely within the platform or with a twelve-inch maximum overlap on the curb and sidewalk. Wheelchair landing shall be a 36 by 48-inch clear floor area that is permitted to overlap with the Wheelchair Turning Space by 24 inches maximum in any orientation.