This is a guide to how you can build a hexagon shaped bar. It’s not a complete plan and requires a little extra material selection and planning on your part, but it’s a good start to an interesting project. With more feedback and interest, this can be developed into a full plan set.
Here is a top down view drawing in wire frame mode with dimensions. Click on images for full size.
Side view:
Isometric View:
Perspective view arm rest:
Rendering: