• Key definitions for the grain handling industry are found in 29 CFR 1910.272.

Key definitions regarding grain handling include:

• Fugitive grain dust: Combustible dust particles, emitted from the stock handling system, of such size as will pass through a U.S. Standard 40 mesh sieve (425 microns or less).
• Grain elevator: A facility engaged in the receipt, handling, storage and shipment of bulk raw agricultural commodities such as corn, wheat, oats, barley, sunflower seeds, and soybeans.
• Hot work: Work involving electric or gas welding, cutting, brazing or similar flame-producing operations.
• Inside bucket elevator: A bucket elevator that has the boot and more than 20 percent of the total leg height (above grade or ground level) inside the grain elevator structure. Not considered “inside bucket elevators” are bucket elevators with leg casings that are inside (and pass through the roofs) of rail or truck dump sheds with the remainder of the leg outside of the grain elevator structure.
• Lagging: A covering on drive pulleys used to increase the coefficient of friction between the pulley and the belt.
• Permit: The written certification by the employer authorizing employees to perform identified work operations subject to specified precautions.