Example: 1,200 cases averaging 15 pounds
That is 18,000 pounds, or 9 US short tons, of estimated cumulative case weight. It does not mean lifting a nine-ton object.
What this number does not tell you
Different cases may be lifted, slid or supported. Weight, height, grip, travel, repetition and posture all affect the work. This estimate is not a measurement of calories burned, biomechanical work, fitness or injury risk.
Why two shifts with the same weight can feel different
A heavy case mix, repeated awkward reaches or restacking can make a shift harder even if the total is similar. OSHA's grocery warehousing guidance describes ergonomic exposures in order selecting. See the physical demands guide for context.
Should this be a competition?
No. Average weight is an assumption, and assignments vary. Do not use this estimate as a productivity target or a reason to take unsafe shortcuts.