Here is a simple model to build a dog ramp. The ramp is built from 2"X4"s, 1/2" ply wood and carpet. The ramp is 16" wide , 56" long, 23" high with a 60" ramp at a ~22 Degree angle. Attached is a Step and Solidworks file to measure all the parts from. This ramp is super strong being able to support our 110 lb doberman