Storage of materials must not create any hazards. Materials that have been improperly stacked or secured can create falling object hazards.
Whether moving materials manually or mechanically, employees must be aware of the potential hazards associated with the task at hand and know how to control their work environment to minimize the danger of being struck or crushed by falling material.
All materials stacked in tiers must be limited in height so they are secure against sliding or collapse. At least eighteen inches of clearance must also be maintained between the top of stacked materials and overhead sprinklers.