If you mean for the run part of the tractor, no... instead you have a skirt of wire mesh that extends out 1-2' on the ground all around the base of the tractor. Predators generally try to dig in from the closest point, and they cna't dig thru 1" welded wire mesh or whatever you're using
If you mean for the house part of the tractor, yes, the house part of the tractor generally has a solid floor. Some people in very very hot climates use wire floors, which has ventilation advantages and the poo can just be hosed right thru, although the wire can be hard on a chicken's feet.
My husband works weigh too much and I homeschool so if we're building something it would need to be pretty easy. My husband has a carpenter friend though who could probably build something really nice for us but where can I find coop plans?
If the carpenter is going to build it for you, you really don't need plans, just a reasonable set of photos and some general dimensions.
If you're going to build it yourself, there are plans available for a *few* small coops online, or you can look at a set of photos and work the plans out yourself, or you can get commercial plans for a small playhouse or shed (available at hardware stores, in library books, etc) and just make the very minor adaptations necessary for it to house chickens.
For simple DIY, I recommend you choose something simple, boxlike, with a shed roof (just single slope, no point at top), and based as much as possible on the natural dimensions of plywood or easy cuts thereof, e.g. 4x8x4 or 8x8x6.
If you browse around here more, esp. looking at peoples coop design personal pages on this site, I betcha you will form a more definite idea of what you do/don't want, and how to achieve it
Have fun,
Pat