Basset spines carry more weight than most owners realize
Bassets are chondrodysplastic like dachshunds, but they also carry 40–65 lb of body weight on those short legs — genuinely heavy for the frame. Their backs are under sustained load simply from standing up, and jumping down from any height is a bad idea. Keep the crate on the floor, use a ramp if it has to be elevated, and never encourage a basset to jump into or out of a car or SUV.
Inside the crate, a firm high-density foam mat is worth the money. Bassets sleep hard and long, and pressure sores on elbows are common on cheap thin mats.