Grooved Borders are to Become a Thing of the Past
Beginning July 1, 2015, the 2013 California Building Code will be removing the requirement for grooved borders at curb ramps, blended transitions and islands. Grooved borders consisted of a 12” wide series of grooves ¼” wide by ¼” deep at ¾” on center along the top of the curb ramp at the level surface of the top landing and at the outside edges of the flared sides. The reason for the grooved border requirement being eliminated is grooves do not meet ADA standards because they are too similar to the surrounding surface to be properly detected. They can be confused with grooves between sidewalk panels and cracks. Also, miscellaneous debris can collect in the grooves and obscure the intended warning. Detectable warnings consisting of truncated domes have become the norm in making curb ramps detectable and compliant with ADA requirements.