1. What is Ramp Gradient Calculation?

Ramp gradient calculation determines the steepness of a ramp by comparing the vertical rise to the horizontal going. It's essential for accessibility compliance and safety in building design and construction.

2. How Does the Calculator Work?

The calculator uses the standard gradient formula:

Where:

• \( Rise \) — Vertical height difference (meters)
• \( Going \) — Horizontal length (meters)
• \( Gradient \% \) — Percentage slope

Explanation: The formula calculates the slope as a percentage, with BS 8300 requiring gradients not exceeding 5% (1:20 ratio) for accessible ramps.

3. Importance of BS 8300 Standard

Details: BS 8300 sets requirements for accessible building design in the UK. The 1:20 maximum gradient ensures ramps are usable by people with mobility impairments, wheelchair users, and those with limited strength.

4. Using the Calculator

Tips: Enter rise and going measurements in meters. Both values must be positive numbers. The calculator will determine gradient percentage, ratio, and BS 8300 compliance.

5. Frequently Asked Questions (FAQ)

Q1: What is the maximum gradient allowed by BS 8300?
A: The maximum gradient for accessible ramps is 1:20 (5%) for distances up to 10 meters.

Q2: When can steeper gradients be used?
A: Steeper gradients may be permitted for short distances or in existing buildings where space is limited, but 1:12 (8.33%) is generally the absolute maximum.

Q3: What about ramp landings?
A: BS 8300 requires landings at top, bottom, and intermediate points for ramps longer than 5 meters, with minimum dimensions of 1200mm x 1200mm.

Q4: Are handrails required?
A: Yes, handrails are required on both sides of ramps with a rise greater than 600mm or length greater than 2 meters.

Q5: What about ramp width requirements?
A: Minimum clear width should be 1200mm, with 1500mm recommended for two-way traffic or wheelchair turning.