1. What is a Ramp Slope Calculator for Australia?

Definition: This calculator determines the slope ratio of a ramp based on its height and length, checking compliance with Australian accessibility standards (AS 1428.1).

Purpose: It helps architects, builders, and designers ensure ramps meet accessibility requirements for people with disabilities.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( S \) — Slope ratio (expressed as 1:X)
• \( H \) — Vertical height (meters)
• \( L \) — Horizontal length (meters)

Explanation: The slope is calculated by dividing the height by the length, then converted to the standard 1:X ratio format used in Australian building codes.

3. Importance of Ramp Slope Calculation

Details: Proper ramp slope ensures accessibility for wheelchair users and compliance with Australian standards (maximum 1:14 slope for accessibility ramps).

4. Using the Calculator

Tips: Enter the ramp height and length in meters. The calculator will show the slope ratio and whether it complies with AS 1428.1 standards.

5. Frequently Asked Questions (FAQ)

Q1: What is the maximum allowable slope for accessibility ramps in Australia?
A: According to AS 1428.1, the maximum slope is 1:14 (approximately 7.1% gradient) for accessible ramps.

Q2: When can steeper slopes be used?
A: Steeper slopes (up to 1:8) may be allowed for short ramps (≤1520mm rise) in existing buildings where space is limited.

Q3: What other requirements does AS 1428.1 specify for ramps?
A: Requirements include minimum width (1m), landing sizes, handrails, and edge protection.

Q4: How is slope ratio different from percentage gradient?
A: Slope ratio (1:X) shows horizontal run per unit rise, while percentage gradient is (rise/run)×100. 1:14 ≈ 7.1%.

Q5: Does this calculator account for landings?
A: No, landings must be calculated separately according to AS 1428.1 requirements (max 9m between landings).