Thornton ADA Ramp Contractors

Almost every accessible route call starts the same way. Somebody measured a ramp, the numbers came back over, and now there's a line item nobody budgeted. The reflex is to rebuild the ramp exactly where it sits. Sometimes that's right. Often it's the pricier of two options and nobody looked at the other one.

Because the ramp isn't the thing. The route is. It starts at a parking stall, crosses a drive aisle, runs up a walk, climbs a ramp, crosses a landing, and ends at a door that has to swing without pushing anybody backward down the slope. Any link can be the reason the route fails, and on plenty of Thornton properties the cheapest fix is building the route to a door with better ground under it.

The question we ask before we measure anything

Walk out from the accessible stall and follow the path a wheelchair actually has to take. A retail building with a row of tenant doors might offer three candidates. An office suite with one entrance and a landscaped island in front of it offers exactly one, and the conversation is short.

Grade is the whole argument. A ramp only gives up so much elevation before it needs an intermediate landing, and every landing eats parking and adds demolition. A door sitting four feet above the lot means a switchback. Another door on the same building sitting eighteen inches above grade takes one short run and one landing.

Then sun, which matters more here than people expect. A north-facing entrance holds shade all winter, and a ramp there glazes over after every thaw no matter how well we build it. A workable door on the south or east side solves that permanently instead of managing it with a bucket of chloride every January.

Rebuild it where it is, or move the route

Numbers we bring back from an entrance walk

• Running slope measured segment by segment, not averaged across the whole ramp
• Cross slope taken at several points across the width, because ramps rarely fail evenly
• Landing dimensions at the top, the bottom, and anywhere the direction changes
• Door swing clearance and the level area a person needs while operating the door
• Any lip where the ramp meets the gutter pan, the walk, or the threshold
• Condition, contrast, and attachment of the existing detectable warning panels
• The full path and distance from the nearest accessible stall, including the drive aisle crossing
• Where water goes at the bottom of the run, and where it goes when that route is frozen

Why a route that passed once drifts out of tolerance here

A ramp is built to a tolerance measured in fractions of an inch, and it's sitting on Adams County clay that doesn't hold still. When water gets under a landing, the soil under it changes volume, and a landing that was dead level on day one develops a slope you can measure. Most of the failures we're called to correct are settlement failures, not construction failures. Somebody built a fine ramp on ground nobody managed.

So we build the dirt. Over-excavate, replace with compacted road base, run the base past the edge of the concrete so the slab isn't sitting on a shelf, and get the water headed somewhere other than the bottom landing. Then #4 bar on chairs, 4,000 PSI air-entrained mix, and joints placed where they won't create a lip on a running surface.

Season matters for this work more than for a driveway, because the tolerances are so tight and cold concrete finishes differently. Late spring through mid-October is where we'd rather be. We do build routes in cold months with heated mix water, accelerator, and blanketing, especially when a property has a hazard it can't leave in place, and we never set a ramp on frozen subgrade. On the properties we serve around Eastlake, the older stock has ramps that were retrofitted onto buildings never laid out for them, while newer pads toward North Creek Farms usually have decent geometry and settled landings. Association property in Hunters Glen tends to be about clubhouse and mail kiosk routes, which are shorter jobs and easier to schedule between seasons.