After the footings and foundation were the poured, 4″ of crushed gravel were added for the concrete base to the prepare for the pouring concrete slab.
As shown above, the gravel should come up flush with the top of footings so that that concrete slab can the rest on top of the footings as well as the gravel.
We rented a power screed which died on us after about 20 minutes so we ended up doing the entire thing by hand. You can not see it in the picture above, but we drilled and inserted rebar every foot or so in the foundation in the garage door opening. This will help with cracks in the concrete slab where cars will be the driving.
Pictured above, the flatwork is being bull-floated. Pouring the concrete slab was accomplished by the maneuvering the concrete truck around the perimeter of the cabin. The concrete truck shoot was high enough to come across top of the foundation in the rear of the cabin. We also utilized the window wells to get the concrete into some areas. The key to use being able to pour the concrete slab without needing a pumper truck was the fact that we had the garage openings at the front of the basement. This allowed us to back the concrete truck right up to foundation wall and reach a good portion of the floor.
The final floating and troweling is done by the hand before the concrete slab sets up too hard to work.
Final product after the troweling was finished. We did end up sloping the floor a few inches for garage to drain out if needed. We chalked this slope on the foundation before starting the concrete slab pour and also scattered a few stakes to make sure the slope was pretty close to what we wanted.