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Slope Ratio Formula:
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Slope ratio represents the steepness of a ramp, calculated as the ratio of vertical rise to horizontal run. It's commonly expressed as "rise:run" (e.g., 1:12) for accessibility compliance and construction standards.
The calculator uses the slope ratio formula:
Where:
Explanation: The calculator converts the rise and run measurements into both decimal format and the standard "1:X" ratio format used in accessibility guidelines.
Details: Proper slope ratios are crucial for wheelchair accessibility, building code compliance, and ensuring safe and comfortable ramp usage. The ADA (Americans with Disabilities Act) recommends specific maximum slopes for different applications.
Tips: Enter rise and run measurements in inches. Both values must be positive numbers. The calculator will provide the slope ratio in both decimal and standard ratio formats.
Q1: What is the maximum slope ratio for wheelchair ramps?
A: ADA guidelines typically require a maximum slope of 1:12 (8.33%) for wheelchair ramps, meaning 1 inch of rise for every 12 inches of run.
Q2: How do I convert slope ratio to percentage?
A: Multiply the slope ratio by 100. For example, a 1:12 ratio (0.0833) equals 8.33% slope.
Q3: What's the difference between slope ratio and slope percentage?
A: Slope ratio is expressed as rise:run (e.g., 1:12), while slope percentage is the ratio multiplied by 100 (e.g., 8.33%).
Q4: Are there different slope requirements for different types of ramps?
A: Yes, steeper slopes may be allowed for temporary ramps or in specific circumstances, but 1:12 is the standard for permanent accessible routes.
Q5: How do I measure rise and run accurately?
A: Measure rise vertically from the lower level to the upper level, and run horizontally along the ramp's length. Use a level and measuring tape for precision.