Raised access floors are designed to support server racks whose weights can run up to 300Kg. In terms of a larger single or three phase UPS system for a computer or server room, the majority of the weight is in the battery set and especially if this is supplied in an external battery cabinet. Each installation design should be checked but if the weight is too high for the floor to support then options include use of a spreader plate, use of a metal plinth or situating the UPS and battery cabinet on a nearby concrete floor.