As someone who's grown up in the Midwest, Menards used to be just a hardware store/lumber yard but in the last 15-20 years really has branched out to more than just a hardware store. Hence the home goods, pet supplies, clothing, groceries, appliances, etc in addition to the hardware store/lumber yard bit. In some ways it's a lot more like Fleet Farm than it is like Home Depot, though Menard's doesn't have the farming supplies and tractor parts and stuff like that which can be found at a Fleet Farm.

Since they made this change, the newer and remodeled stores are the ones with the multiple floors since they need all the floor space. But I remember some of the original and smaller stores were also multiple floors (electrical was typically upstairs), but those might be all gone by now. The one we went to when I was a kid wouldn't be anyway close to being ADA compliant today. That store moved locations and the old building is long gone now.