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Wheelchair Ramp Slope Formula:
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The wheelchair ramp slope calculation determines the incline percentage of a ramp using metric measurements. It helps ensure accessibility compliance and safe wheelchair navigation by calculating the relationship between vertical rise and horizontal run.
The calculator uses the slope percentage formula:
Where:
Explanation: The formula calculates the percentage incline by dividing the vertical rise by the horizontal run and multiplying by 100 to convert to percentage.
Details: Proper ramp slope is crucial for wheelchair accessibility, safety, and ADA compliance. Steep slopes can be dangerous and difficult to navigate, while proper slopes ensure safe and independent access for wheelchair users.
Tips: Enter the vertical rise and horizontal run in meters. Both values must be positive numbers. The calculator will provide slope percentage, slope ratio, and compliance status based on accessibility standards.
Q1: What is the maximum ADA compliant slope?
A: The maximum ADA compliant slope is 1:12 ratio, which equals 8.33% incline. This is the steepest slope allowed for wheelchair ramps.
Q2: What slope ratio is recommended for manual wheelchairs?
A: For manual wheelchairs, a slope of 1:16 (6.25%) or gentler is recommended for easier propulsion and reduced strain on users.
Q3: How do I measure rise and run accurately?
A: Measure rise vertically from the lower level to the upper level. Measure run horizontally along the ramp's intended path, not the diagonal length.
Q4: What if my slope exceeds 10%?
A: Slopes exceeding 10% are generally not suitable for wheelchair use and may require platform lifts or alternative accessibility solutions.
Q5: Are there different requirements for different ramp types?
A: Yes, permanent ramps have stricter requirements than temporary ramps. Residential ramps may have slightly different guidelines than public access ramps.