Question: How to model the support of a horizontal element on a concrete column?

Answer: This cannot be achieved through the Base plate operation, as the element anchored in concrete cannot be positioned at a 0-degree angle.

Instead, you can use the Bolt, grid or contact tool. Select "Anchors" for the Fastener, which automatically provides a concrete block (you have the option to select an existing one or add a new one). Then, adjust its dimensions and distribute the anchors accordingly.