Select the mode and input required parameters in their respective fields. The tool will instantly calculate the slope, run, and length of the ramp along with other related parameters.
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Our slope ramp calculator will perform the calculations required to design a ramp. By using the results of the tool, you can easily construct a ramp that will allow you to push a wheelchair a few steps higher.
The Americans with Disability Act has strictly asked companies to build a ramp with a constant slope. This is why it is very important to calculate the ramp slope before you actually start constructing it. Also, ADA strictly orders to use the minimum steep slope for a ramp to build. Standard ramp slopes include:
Ramp Slope Type | Rise:Run | Slope % | Slope Angle |
---|---|---|---|
Maximum | 1:12 | 8.33 | 4.76 |
Comfortable | 1:16 | 6.25 | 3.58 |
Minimum | 1:20 | 5 | 2.86 |
Our wheelchair ramp slope calculator helps you calculate the ramp slope readily. But if your goal comes up with manual calculations, then you first need to understand unit conversions for the slope.
For every one part rise, there is a considerable increase in the run of the ramp.
Slope (Ratio) = Rise: Run
The most common ramp slopes are 1:8, 1:12, and 1:20, respectively.
It is the angle between the run and the ramp floor.
Slope (Angle) = arctan (Rise/Run)
Our slope ramp calculator calculates the ramp slope angle in multiple units of measurement.
In the United States and Europe, the ramp slopes are calculated in units of slope percentage.
Slope (%) = Rise/Run *100%
Slope (%) = 100% *tan (angle)
A ramp is just like a right triangle. Now if you know the slope (hypotenuse) and rise of the ramp, you can easily apply the Pythagorean theorem to calculate the slope of the ramp.
Hypotenuse2=Rise2+Run2
Run=Hypotenuse2-Rise2
This is the best way to calculate ramp length.
To calculate ramp slope angle, you need to follow the Americans With Disabilities Act (ADA) standard angle measures. These include:
For measuring the ramp length, you need to know the height of the wheelchair from ground level. Else for calculations, let it be done by the wheelchair ramp slope calculator in seconds.
Our ADA ramp slope calculator performs instant calculations for your desired ramp structure. Let’s go through the guide below that will help you enter the required parameters in the tool.
Input:
If you choose “Simple”:
If you choose “Advanced”:
Output:
The standard ramp incline is 1 vertical to 3 horizontal. And if the incline ratio is 1:8, then the structure of the ramp must be triangular. Moreover, you must know that the gap between all the corners of the ramp is equal.
A 100% ramp slope is one having a slope angle of \(45^{o}\). For instance, look at the following formula:
Slope Percentage = 100% × Tangent (Slope Angle)
For a 100% ramp slope, the angle becomes \(45^{o}\) such that:
Slope Angle = arctan(1)
Slope Angle = 45°
From the source Wikipedia: Inclined plane, Uses, Terminology, Frictionless inclined plane, Analysis, Mechanical advantage using power
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