What Is the ADA Slope Requirement for Parking?

What Is the ADA Slope Requirement for Parking?

Quick Answer

ADA standards require accessible parking spaces and access aisles to have a maximum slope of 2% in any direction. This means the surface must be nearly level.

Understanding the 2% Requirement

What 2% Means

  • Rise: 2 feet per 100 feet of run
  • Equivalent: About 1/4 inch per foot
  • Practical: Nearly level to the eye
  • Applies to: Both running slope AND cross slope

Where It Applies

  • Accessible parking spaces
  • Access aisles
  • Routes from parking to building entrance
  • Any accessible path of travel

Why Slope Matters

Wheelchair Safety

  • Wheelchairs roll on slopes
  • Difficult to brake on inclines
  • Users may tip or fall
  • Transfer to vehicles compromised

Mobility Aid Users

  • Walkers unstable on slopes
  • Crutch users affected
  • Balance-impaired individuals at risk
  • Service animals affected

Vehicle Accessibility

  • Wheelchair lifts may not operate
  • Ramps deploy incorrectly
  • Side-loading compromised
  • Entry/exit dangerous

Common Slope Problems

Drainage-Related

  • Lots designed to drain water
  • Catch basins create low points
  • Accessible spaces in wrong locations
  • Original design didn’t consider ADA

Settling and Age

  • Pavement settles over time
  • Subgrade compression
  • Localized sinking
  • Original compliance now violated

Poor Design

  • Accessible spaces on sloped areas
  • Ramp sections in access aisles
  • Inadequate grading
  • Shortcuts during construction

Measuring Slope

Tools Needed

  • Digital level (most accurate)
  • Traditional level with measurement
  • Smart phone apps (approximate)

Measurement Method

1. Place level on surface
2. Measure in multiple directions
3. Record running slope (direction of travel)
4. Record cross slope (perpendicular)
5. Highest reading determines compliance

When to Measure

  • Before striping accessible spaces
  • During compliance assessments
  • After lot modifications
  • Responding to complaints

Correcting Slope Issues

Relocate Spaces

Surface Modification

  • Remove and replace affected area
  • Re-grade to proper slope
  • More expensive but complete solution
  • May be necessary if no flat areas exist

Design Considerations

  • Consider drainage in design
  • Plan accessible spaces first
  • Allow for future settling
  • Coordinate with civil engineering

Compliance Importance

Penalties

Beyond Compliance

  • Serve all customers
  • Reduce liability
  • Demonstrate accessibility commitment
  • Good business practice

Get ADA-Compliant Accessible Parking

Lowcountry Line Striping assesses slope conditions and helps create compliant accessible parking.

Call (854) 855-7002 for ADA parking assessment.

With 32 years of experience since 1994, we help Charleston-area businesses achieve and maintain ADA compliance.

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Lowcountry Line Striping – ADA Compliance Specialists in Charleston, SC

Phone: (854) 855-7002