October 30, 2009
Curb Ramps are not Ramps. Oddly, there seems to be some confusion about this.
To keep it simple, if there is no curb, it’s a ramp.
But to answer all of those questions that go beyond “keeping it simple” print out 50 copies of CurbRampVRamps and glue them liberally to desks throughout your office.
Your coworkers will thank you.
December 11, 2008
UPDATE: The 2010 Standards do not require detectable warnings on curb ramps.
218 and 810 Transportation Facilities
Detectable Warnings. Detectable warnings provide a distinctively textured surface of truncated domes. The 1991 Standards at sections 4.1.3(15), 4.7.7, 4.29.2, 4.29.5, 4.29.6, and 10.3.1(8) require detectable warnings at curb ramps, hazardous vehicular areas, reflecting pools, and transit platform edges. The 2010 Standards at sections 218, 810.5, 705.1, and 705.2 only require detectable warnings at transit platform edges. The technical specifications for the diameter and spacing of the truncated domes have also been changed. The 2010 Standards also delete the requirement for the material used to contrast in resiliency or sound-on-cane contact from adjoining walking surfaces at interior locations.
The 2010 Standards apply to detectable warnings on developed sites. They do not apply to the public right-of-way. Scoping for detectable warnings at all locations other than transit platform edges has been eliminated from the 2010 Standards. However, because detectable warnings have been shown to significantly benefit individuals with disabilities at transit platform edges, the 2010 Standards provide scoping and technical requirements for detectable warnings at transit platform edges.
You may have been having problems finding the requirement for detectable warnings on curb ramps in the revised ADA/ABA Guidelines (published July 23, 2004). You won’t find it here.
But you can find it in the March 23, 2007 supplement at this link: Modification to 406 of Appendix D
406.8 Detectable Warnings. A curb ramp shall have a detectable warning complying with 705. The detectable warning shall extend the full width of the curb ramp (exclusive of flared sides) and shall extend either the full depth of the curb ramp or 24 inches (610 mm) deep minimum measured from the back of the curb on the ramp surface.