“Is it underneath 20 kilos? Then it’s high quality to raise.”
That delusion has lived too lengthy on manufacturing unit flooring.
In actuality, the risks of handbook palletizing aren’t nearly how a lot your crew lifts—however how usually, how far, and the way awkwardly. The so-called “20-pound rule” overlooks the cumulative toll of repetitive movement, poor posture, and continuous shifts. And for meals and beverage producers, that may imply rising damage dangers hiding in plain sight.
Let’s unpack why weight alone is a deceptive metric—and what to deal with as a substitute.
What the “20-pound” rule will get incorrect
At first look, 20 kilos doesn’t sound like a lot. However raise that very same field 600 instances a shift? That’s 6 tons of whole weight moved in a day—usually with twisting, reaching, and bending combined in. The pressure builds quick, particularly when the tempo is relentless.
Right here’s what weight-only considering ignores:
- Repetition: Even mild masses, completed steadily, result in muscle fatigue and joint stress.
- Posture: Awkward lifts from beneath the waist or above the shoulders dramatically enhance the prospect of again and shoulder accidents.
- Distance: Lifting bins farther from the physique will increase the power required—and the danger.
- Pace and strain: Palletizing is a time-sensitive process. That strain provides rigidity and threat to each motion.
That’s why ergonomic consultants—and security companies like NIOSH—use extra holistic instruments to judge lifting threat.
What really issues: The true threat components
Instruments just like the NIOSH Composite Lifting Index (CLI) account for:
- Frequency and period of lifts
- Vertical and horizontal attain distances
- Twisting and asymmetry
- Coupling (grip high quality)
- Load weight and dealing with zone
A CLI rating above 1.0 means elevated threat. Over 3.0? You’re possible on borrowed time earlier than somebody will get damage.
Spoiler alert: Many handbook palletizing duties hit that threshold quick—even when bins weigh lower than 20 kilos.
The price of ignoring ergonomic actuality
Harm from overexertion isn’t simply painful. It’s costly:
- $39,000+ common price per again damage
- Weeks of downtime and misplaced output
- Greater turnover, tougher recruiting
- Elevated insurance coverage premiums
And the worst half? These are preventable.
What to do as a substitute: Eradicate the raise, not simply the load
The easiest way to guard your folks (and your margins)? Get them out of the hazard zone completely.
Robotic palletizing with a Robotiq cobot system means:
- No extra repetitive lifting
- No extra awkward postures
- A CLI rating of zero
- And a system that installs in simply 3 days, with no facility redesign
In different phrases: Much less threat, extra reliability—and a workforce that may deal with higher-value work as a substitute of repetitive pressure.
Backside Line: Do not let a quantity idiot you
That 20-pound field might sound innocent. However the fact is, weight is only one piece of the puzzle. If you happen to’re nonetheless counting on outdated guidelines of thumb, you would possibly already be risking greater than you understand..
💻 Be part of our ergonomics webinar with licensed security knowledgeable Carla Silver – register at the moment!
📘 Want extra particulars and statistics? Obtain our Ergonomics book, additionally by Carla Silver.
