1926.250 - General requirements for storage. | Occupational Safety and ... 1926.250 (a) General. 1926.250 (a) (1) All materials stored in tiers shall be stacked, racked, blocked, interlocked, or otherwise secured to prevent sliding, falling or collapse. 1926.250 (a) (2) (i) The weight of stored materials on floors within buildings and structures shall not exceed maximum safe load limits. 1926.250 (a) (2) (ii)