Hawaiian Solution to Walkway Excessive Differential Elevations
Here is something I found in many locations while walking around Honolulu on a recent blogging trip. See the photo below. Notice the yellow painted differential elevations in the walkway.
Standard 403.4 [Walkway Surfaces] Changes in Level, states, “Changes in level shall comply with [Standard] 303.” Standard 303.2 [Changes in Level] Vertical, states, “Changes in level of ¼ inch (6.4 mm) high maximum shall be permitted to be vertical.” In other words, the most you can have at a change of level is 1/4 inch vertical. The diagram below is representative of this standard.
Maximum Abrupt Vertical Change in Walking Surface Elevation