Constructing Ramps, Staircases and Seating
Ramps are an economical method of providing accessibility compliance to grade changes. Architectural and retaining walls are often used to contour along the outside of a gentle entrance way ramp, or to provide the actual grade change for elevated ramp structures.
Wall: Proterra™ Split, Greyfield
150 mm (6”) min.
The Integrated Accessibility Standards define an acceptable range of tread rise (vertical change) and run (depth of step tread) that is more stringent than the original OBC criteria – see adjacent. After consultation with contractors and designers, Oaks developed two step systems (to date) to address their aesthetic objectives, provide compliant design options, and improve constructability and in turn long term stability – see Page 56 for product details.
Acceptable range is 280 to 355 mm Each step tread to be consistent
Acceptable range is 125 to 180mm
Compacted Granular Fill
Finished Grade
Use additional step below grade to prevent staircase movement. All steps to be glued together using landscape adhesive.
150 mm (6”) min.
150 mm (6”) min.
Our Aria and Nueva ® Step systems comply with Design of Public Space criteria
Steps: Nueva ® Step, Twilight Pavers: Molina ® 60mm, Moraine and Twilight border
30
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