Abstract: A human powered movement apparatus for moving a wheeled structure or scaffold. The human powered movement apparatus having a horizontal lever bar operable by a person working on a platform of the scaffold. The horizontal lever bar is connected, by way of a shaft, to a wheel frame with a set of unidirectional wheels. When the operator moves the horizontal lever bar in one direction, the wheel frame pivots about one of the unidirectional wheels while the other unidirectional wheel rolls freely causing the scaffold to advance in an arc. Movement of the horizontal lever bar in the opposite direction results in a similar movement with the behavior of the unidirectional wheels reversed. Repeated movement of the horizontal lever bar results in forward movement of the scaffold through a cambering motion.