Methods exist for beams and shell edges. If you use A/CAE as preprocessor you'll find these kind of loads when creating a load.
The keyword would be *Dload. More details are in the manual.
Users Manual 34.4.3 Distributed loads - Section: Edge tractions and moments on shell elements and line loads on beam elements
There is no general method for edges of solids, since this is rarely needed. In reality there is nearly no situation where a edge of a volume gets a separate load.
One workaround would to create a distributed coupling from that edge to a ref node and add a point load on the ref node. Another workaround would be to create a weak beam on that edge by reusing the solid nodes (=create a stringer). Then you can create the line load on the beam.