His feet seemed to sink right into the concrete floor.

The last thing she wanted was for him to pass out and hit his head on the concrete floor.

There was a black line painted on the concrete floor.

Stood for a second with her feet on the cold concrete floor, trying to get it exactly right.

The concrete floor of the large building seemed to be the only thing left intact.

She turned to see him running across the concrete floor.

The room is quite large, about 600 square feet, with a concrete floor.

"You know how much it would have cost to put in a concrete floor like this today?"

Just sit down on the nice clean concrete floor and give me your attention, if you please.

We felt really cold sitting on the concrete floor in the garage.