Our coop is 24" elevated. The ramp is 54" long. They sit on it sometimes, so it is an area that needs occasional scrapping. I might shorten the ramp a bit soon. I could afford to put in a few more horizontal slats. I agree with the idea that 40" might be a bit high. The 24" height allows a nice area under. Lets the wheel barrow fit nicely for the rare full clean out. The whole run is deep litter so no cleaning outside.
