Here's a link for ya.
http://www.adawheelchairramps.com/wheelchair-ramps/ada-guidelines.aspx
...ya might want to do the ramp like they say. There may be local ordinances requiring same. There are also requirements for ramps prior to resale of home in some places. A ramp built to these standards will make it easier on mz decomp to push ya recliner in and out of the house (with you in it of course) in case ya feels the need for a little sunshine whilst ya is waiting for something to come on the tv.
Liberals are like a "Slinky". Totally useless, but somehow ya can't help but smile when you see one tumble down a flight of stairs!