Before selecting the dimensions of your sliding door threshold ramp, it is important to collect a few measurements from your sliding door threshold to ensure your ramp will fit and function properly. For this part, you’ll need a tape measure as well as a level to help you get the most accurate measurements.
First, measure the interior height of your threshold, starting from the floor to the top of the sliding door tracks. Use a level to get an accurate measurement if the threshold is over an inch in height. Round up to the nearest inch and record your measurement.
This video summarizes how to measure your sliding door threshold to ensure your threshold ramp will have a perfect fit when selecting the ramp’s dimensions.