Answer:
A user-defined wind load distribution is not provided in the Eurocode. In order to implement a user-defined wind load distribution in the RF‑/TOWER Loading add-on module, this can only be done after conversion to DIN; for example, DIN 4131:1993‑11; see Image 01, Window "1.3 Wind Load – Part 1".
Then, you can select the user-defined distribution in Window "1.4 Wind Load – Part 2" and define it in the adjacent table; see Image 02.
