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DDA Compliant Ramp Formula:
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The DDA (Disability Discrimination Act) compliant ramp calculation determines the minimum required length of a ramp based on the vertical rise. It follows the standard slope ratio of 1:12, meaning for every unit of vertical rise, 12 units of horizontal run are required.
The calculator uses the DDA compliant ramp formula:
Where:
Explanation: This formula ensures the ramp meets accessibility standards with a maximum slope of 1:12 as required by DDA guidelines.
Details: Proper ramp design is crucial for accessibility compliance, ensuring safe and easy access for people with mobility impairments, wheelchair users, and those with other disabilities.
Tips: Enter the vertical rise in meters. The value must be greater than zero. The calculator will compute the minimum required ramp length according to DDA standards.
Q1: What is the maximum slope allowed by DDA?
A: The maximum slope allowed is 1:12, meaning for every 1 unit of vertical rise, 12 units of horizontal run are required.
Q2: Are there exceptions to the 1:12 rule?
A: In some cases with space constraints, steeper slopes may be permitted with additional safety features, but 1:12 is the standard for full accessibility compliance.
Q3: What other requirements does DDA have for ramps?
A: Requirements include proper handrails, adequate width, landing areas, and non-slip surfaces in addition to the slope specification.
Q4: Does this calculation work for both indoor and outdoor ramps?
A: Yes, the 1:12 slope requirement applies to both indoor and outdoor ramps under DDA guidelines.
Q5: How often should ramp calculations be verified?
A: Calculations should be verified during initial design and whenever modifications are made to ensure ongoing compliance with accessibility standards.