Ramdeo, The question should be, does the floor drain serve a viable purpose. The fixtures of today have only a minimal chance of overflow. Most facilities do not wet mop the restroom floors, so floor drains have no reliable source of water to maintain a trap seal. So the installation of a floor drain mandates the installation of a reliable means of maintain a trap seal. I generally specify an electronic trap primer system ( the "wiggle waggle devices plug up too quickly and are not normally maintained and the rubber inserts, while better than nothing, are made by man and subject to failure). Hence the IPC does not mandate floor drains within the restroom. That does not preclude floor drains from being installed if the Owner desires them. It is probably just a matter of time before the UPC and NSPC move toward the IPC language.
David Dexter, F.NSPE, F.ASPE
Registered Professional Engineer
Mechanical, Plumbing & Fire Protection
Cell: (937) 609-5969