Title:
Designing for Constructability— ADA Surface Accessibility
Author(s):
American Society of Concrete Contractors (ASCC) Technical Committee
Publication:
Concrete International
Volume:
40
Issue:
11
Appears on pages(s):
30-31
Keywords:
slope, concrete, ramp, level
DOI:
10.14359/51712288
Date:
11/1/2018
Abstract:
Designing slopes at the maximum limits required for compliance with the Americans with Disabilities Act (ADA) often results in unnecessary rejections of constructed sidewalks and ramps. To accommodate for the accuracy of the inspection tool and the effects of local surface roughness, the ASCC Technical Committee recommends that designers specify maximum slopes that are slightly less than the ADA requirements. This article provides the committee’s recommendations for specifying and measuring slopes for walks and ramps.
Related References:
1. Ballast, D.K., “Dimensional Tolerances in Construction and for Surface Accessibility,” U.S. Access Board, Washington, DC, 2011, www.access-board.gov/research/completed-research/dimensional-tolerances.
2. “Americans with Disabilities Act and Architectural Barriers Act Accessibility Guidelines,” U.S. Access Board, Washington, DC, July 23, 2004, 322 pp.
3. ACI Committee 117, “Guide for Tolerance Compatibility in Concrete Construction (ACI 117.1R-14),” American Concrete Institute, Farmington Hills, MI, 2014, 47 pp.
4. ASCC Position Statement #43: “Concrete Industry Tolerances for ADA/ABA Work,” Concrete International, V. 38, No. 8, Aug. 2016, p. 61.
5. ACI Committee 117, “Specification for Tolerances for Concrete Construction and Materials (ACI 117-10) and Commentary (ACI 117R-10) (Reapproved 2015),” American Concrete Institute, Farmington Hills, MI, 2010, 76 pp.