Yes!...Any floor built to minimum building codes will support a Waterbed... If not, sorry, your building is condemned, bedder move....
There is less weight per square foot than a refrigerator, piano, washing machine, or ten people standing on your floor.
A Hardside fiber filled water mattress or a Softside water mattress can weigh 14% to 75% less than a regular all water type mattress.
Yes... all Hardside and Softside water mattresses are safe on your floor.