Ramp Calculation Chart
* Support Stands required for 14' - 20' lengths. Support stands are strongly recommended for any portable ramp longer than 11 feet. We recommend placing a pair of support stands every 6-7 feet. The support stands easily attach to the portable ramp using bolts and nuts provided. No special tools are needed.
HOW LONG OF A RAMP SHOULD I BUY?
Generally Recommended Slope Angles:
5-degree: This is Americans With Disabilities Act compliant – click here for more information about Roll-A-Ramp and ADA
7-degree: Manual wheelchair users who are independent or who have an attendant with limited strength
10-degree: Manual wheelchairs with a reasonably strong attendant
12-degree: Power wheelchairs or scooters and manual chairs with a strong attendant
15-degree: Restricted space, unoccupied loading/unloading
Determining the length of a ramp is not complicated
Determining Ramp Length:
Measure total rise (how many inches from lower level to upper level) and divide by the slope.
5-degree: Rise distance divided by 1
7-degree: Rise distance divided by 1.5
10-degree: Rise distance divided by 2
12-degree: Rise distance divided by 2.4
15-degree: Rise distance divided by 3
Example: For a desired slope of 7 degrees with a rise of 12″ (1 foot), 12/1.5 = 8 foot ramp