Abstract: A scaffolding or extendable ladder mechanism is attachable to a rack elevated from a base level. The scaffolding includes a housing fixedly attached to the rack, and a rail mechanism slidably attached to the housing. The rail mechanism is movable between a stowed position and a deployed position. A ladder is movably attached to the rail mechanism, and is slidable and rotatable relative to the rail mechanism. The ladder is movable between a retracted position, substantially within the rail mechanism, and an extended position, substantially outside of the rail mechanism. The extended position of the ladder is also rotated relative to the rail mechanism, and the ladder is nearer the base level in the extended position than in the retracted position.