1. What is a DDA Compliant Ramp Calculator?

Definition: This calculator determines the required length of a ramp to meet Disability Discrimination Act (DDA) compliance standards in the UK.

Purpose: It helps architects, builders, and property owners design accessible ramps with the recommended 1:20 slope ratio.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( L \) — Required ramp length (meters)
• \( H \) — Height difference/vertical rise (meters)

Explanation: The 1:20 slope ratio means for every 1 meter of vertical rise, you need 20 meters of horizontal run.

3. Importance of DDA Compliant Ramps

Details: Proper ramp design ensures accessibility for wheelchair users and mobility-impaired individuals, meeting legal requirements and promoting inclusivity.

4. Using the Calculator

Tips: Simply enter the height difference (vertical rise) in meters. The calculator will determine the minimum required ramp length.

5. Frequently Asked Questions (FAQ)

Q1: Is 1:20 the only acceptable slope?
A: While 1:20 is ideal, steeper slopes may be allowed in constrained spaces (maximum 1:12 for short distances).

Q2: What about landings?
A: Ramps longer than 10m require level landings at least 1.5m long - this calculator provides the slope length only.

Q3: Does this include handrail requirements?
A: No, remember that DDA-compliant ramps also require handrails on both sides when the rise is > 200mm.

Q4: What's the maximum rise for a single ramp?
A: The total rise for a single ramp run should not exceed 2m without intermediate landings.

Q5: Are there width requirements?
A: Yes, DDA requires minimum clear width of 1.5m for public access ramps.