Ramp Calculator

The ADA Ramp Calculator allows users to determine the required dimensions for an ADA-compliant ramp, including total ramp length, number of landings, and total area based on user input of height, slope ratio, landing length, and ramp width.

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How to Use the ADA Ramp Calculator

The ADA Ramp Calculator is a valuable tool designed to help you determine the necessary ramp specifications to meet ADA guidelines. Follow the detailed instructions below for an accurate calculation of your ramp’s dimensions and other crucial metrics.

Step 1: Input the Total Rise

  1. Locate the field labeled “Total Rise (Height in Inches)”. This input is essential as it determines the height that the ramp needs to overcome.
  2. Enter the height/rise. Make sure to enter a value between 0.25 and 360 inches. The value is required, and it should represent the total vertical rise that your ramp must cover.

Step 2: Choose the Slope Ratio

  1. Find the “Slope Ratio” dropdown menu. This option allows you to select the slope ratio for your ramp.
  2. Select a slope ratio from the options provided:
    • 1:12 (Standard ADA Slope)
    • 1:16 (Gentler Slope)
    • 1:20 (Very Gentle Slope)

    The choice of slope affects the length of the ramp.

Step 3: Enter the Landing Length

  1. Locate the field labeled “Landing Length (Inches)”. This input determines the necessary length of flat landing areas between ramp segments.
  2. Input the landing length in inches, ensuring it’s a minimum of 60 inches. This field must be completed as it impacts the overall system length.

Step 4: Specify the Ramp Width

  1. Find the field labeled “Ramp Width (Inches)”. This input specifies the desired width of your ramp.
  2. Input the width, ensuring it’s at least 36 inches wide. This measurement is crucial for accessibility and compliance with ADA standards.

Step 5: Calculate the Results

Once all of the input fields are correctly filled, the calculator will automatically generate the output values. Here’s what you’ll learn:

  1. Required Ramp Length: This is calculated using the formula heightInches * slopeRatio and will give you the necessary length of the ramp in inches.
  2. Number of Required Landings: Using ceil(rampLength / 360), this tells you how many flat landings you need. More landings are required for longer ramps.
  3. Total Length Including Landings: Determined by the formula rampLength + (numberOfLandings * landingLength), providing the overall length in inches.
  4. Total Area: Using totalLength * rampWidth, this metric calculates the total surface area in square inches.
  5. Total Area in Square Feet: The calculator will also convert the total area to square feet using the formula totalArea / 144, helpful for a broader overview of the space requirements.

By carefully completing each of these steps, you ensure that your ramp complies with ADA standards and fits the specific needs of your location. Remember to double-check your inputs for accuracy to attain the most reliable results.