The bars are used to separate the sections of the border.
There are no fixed rules but the design has used them in a reasonably
consistent way (unlike the Bayeux Tapestry).
They attempt to bring a focus to the images below in the
central panel. The use of the bars is however constrained by the shape of
the images they surround.
The design provides a simple bar to mark where they are to
be placed. However, the embroiderers are free to design the bars or add a
double bar if the space permits. The bars themselves can be embellished
and designs can be incorporated between double bars and surrounding single
bars.
When opposing bars meet. They are referred to as ‘tents’.