A 4 inch layer of compacted gravel should be laid down as a foundation for the ramp.
Building a ramp over concrete steps. To determine the slope of your ramp and how much horizontal space it will require, use the following calculation per the ada guidelines: How to build a concrete ramp? Instructions for building a concrete ramp.
The mixture of water and cement is made. In this article, we will provide. Prepare a subbase for the ramp with 4 inches of compacted gravel.
A standard unit is 30 feet long, 30 inches wide, and 30 inches high.