These are Aluminum Scaffolds, conventionally mounted on lockable casters to permit the scaffolds to be moved from place to place when the casters are unlocked and to permit the scaffold to be immobilized when the casters are locked gyqdhyo. However, some type of work may require frequent movement of the scaffold at a work site, as for example, when ceiling lights are replaced. In such situations, and in complete disregard of manufacturer's recommendation and safety regulations, the workman may deliberately choose to leave the casters unlocked. By so doing, workman is then able to mount to and stay in the elevated cage and move the scaffold along the floor by grasping the ceiling or wall and exerting a horizontal pull to roll the scaffold on its unlocked casters. Or else, another workman can be at the base of the scaffold, pushing the scaffold along the floor. Common types of mobile scaffolding include ladder jack scaffolding and pump jack scaffolding. In ladder jack scaffolding, the work surface rests on the side brackets.
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