ADA Ramp Surveys in San Francisco, CA

San Francisco is the hardest place in the Bay Area to build a compliant curb ramp, and the reason is the terrain. On a street that already falls at ten or fifteen percent, the ramp running slope, the gutter counter-slope, and the crosswalk approach all fight each other, and the cross slope allowed on a landing under California Building Code Chapter 11B leaves almost no room to absorb the grade. Public Works runs the city curb ramp program together with the Mayor's Office on Disability, and every paving contract that touches a corner puts those returns back in play, because federal law treats resurfacing as an alteration that triggers curb ramp upgrades.

We measure the ramp as a surface rather than as a handful of smart-level readings. A Trimble scan or a dense total-station shot set puts thousands of points across the ramp face, the flares, the top landing, the gutter pan, and the receiving side of the crosswalk, so running slope, cross slope, and counter-slope come out of the data at whatever section line anyone wants to check later. The same method handles building entrances on Market, Mission, Van Ness, and Polk, where a ramp or a regraded landing has to fit between a historic facade and a public sidewalk, and accessible parking, where the stall and the access aisle are held flat in every direction and a single asphalt overlay can quietly break it.

You get slope and cross-slope exhibits, spot elevations on a plan a contractor can build from, and the registered point cloud if the design team wants it. We document built conditions; the CASp inspector, architect, or attorney draws the compliance conclusion. Pair it with 3D laser scanning in San Francisco for interior path-of-travel work, or with as-built surveys in San Francisco when the ramp is one piece of a larger existing-conditions package. Service overview: ADA compliance surveys.