Curb ramps, accessible sidewalks, ramp runs and level landings are concrete work with almost no room for error. A ramp that's a fraction too steep or a landing an inch too short can fail inspection. We form and pour accessible concrete to the slopes and dimensions on your plans and check them before the truck arrives.
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These are the dimensions we build to most often, straight from the U.S. Access Board's 2010 ADA Standards:
Curb ramps have their own rules in section 406. The counter slope of the gutter and road at the bottom of the ramp can be no steeper than 1:20, flared sides no steeper than 1:10, and a landing at least 36 inches long is required at the top. Curb ramps and their flares also can't project into vehicle lanes, parking spaces or access aisles (406.5), which is a common problem on retrofits.
Accessible stalls and aisles are part of the route. The Standards call for car spaces at least 96 inches wide, van spaces at least 132 inches, and access aisles at least 60 inches wide running the full length of the space, with surfaces no steeper than 1:48 in any direction. In Nampa, ADA spaces are required in addition to a use's standard parking count (City Code 10-22-6), and rebuilding a lot triggers bringing ADA parking up to current code (10-22-5.K.4). More on concrete parking lots.
Concrete finishes to within fractions of an inch, and a ramp's slope is set by the forms, not fixed afterward. We set forms to the design elevations, verify slopes with a level and grade check before the pour, and finish ramp surfaces with a broom texture across the direction of travel for traction. Detectable warning surfaces and handrails are set where the plans call for them.
Accessibility design is the job of the architect or engineer of record. We build what's drawn, flag field conditions that won't work, such as an existing grade that can't fit a 1:12 run, before concrete is placed, and coordinate with the inspector. For walks and plazas around the building, see commercial flatwork.
Send the plans or a site address and a description of the ramps or routes involved. Call anytime at (208) 505-4111 or send the Nampa Quote Request form, and we'll set up a site visit and an itemized written quote.
Call (208) 505-4111Email: info@nampaconcreteworks.com
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