The Black Wall, known by many as the chair hitch, is used by the Steeple Jack while working in the chair up or down; stopping to rest or work, reach through the rope of your chair, grab the fall line by the right hand, pulling it through between yourself and the rope of your chair. At the same movement turning the rope from left to right making a loop in this movement, reach up and set it on the hook of the block at the chair; while doing this reach with the left hand and hold your four lines tight together. This prevents you from going down while making the Black Wall or chair hitch, as it is commonly known.
Black Wall Knot