How to create a gap in place of a face?

Question

Blender

This is the door. I would like to divide it into boards to add detail. How to make a gap (gap) in place of the orange stripes (faces)?

Answer 1

1. selected the edges to make gaps from
2. used the Bevel tool Ctrl+B

3. the width of the "gaps" can be set approximately with the mouse, or exactly - in the settings panel

Answer 2

Above, the person answered you, but there is something else, if it is a gap, but without creating a gap between the faces (ribs) - in edit mode - V.