What is the load transfer route of one-way ribbed beam floor?

The load transfer of building structures is generally from top to bottom. Plate-beam-wall, column-foundation.

I don't know what you mean by one-way rib. If it is a ribbed slab, the load is transmitted from the slab to the rib, from the rib to its support, usually a beam (sometimes it may be a roof truss or arch) or a wall, then from the beam to the wall or column, and then to the foundation.

The rib of the plate is actually a beam. According to the designer's intention, the rib can be designed to work alone to bear the load from the plate, or it can be designed to work with a part of the plate to form an L-shaped or other cross-sectional beam. At this time, only a part of the load from the plate is transferred to the beam, and the load of the plate part forming the beam with the ribs becomes the self-weight of the beam.

I said a lot, maybe it doesn't matter. I don't know if it will help you at all.