Double Footrope Knot

This is the knot I used on the lifelines gate thimble side. Traditionally this form was used as the knot at the end of a rope held over the side of a ship for a sailor to get a foot hold to climb aboard... a foot rope, if you will.

The doubled version here is simple the single version with the strands led along and under the first pass of the two comprising knots, a wall and a crown.

First a wall, then a crown
tie it up, then tie it down.
-Ashley Book of Knots