How is the laying direction of a reinforcement defined in RF‑CONCRETE Surfaces?

The direction of the longitudinal reinforcement is defined in Window "1.4 Reinforcement" in the "Reinforcement Layout" tab.

Here, the reinforcement direction phi‑1 corresponds to the direction of the local x‑axis of the FE element (for results) by default. In the default setting, the direction of the local x‑axis of the FE element or of the surface is identical for the input as well as for the results.