The Number
4
Struck-by and caught-between incidents make up half of the Focus Four hazard categories. While we often associate these hazards with heavy machinery or active construction sites, the underlying physics apply directly to the office environment.
As we move into fall and tackle end-of-Q3 archiving, office reorganizations frequently create massive, unrecognized struck-by hazards in the form of top-heavy furniture. To prevent these incidents, 29 CFR 1910.176(b) strictly requires that stored materials be secured against sliding, falling, or collapse.
What's Behind It
Paper is exceptionally heavy. When files are consolidated and moved into storage during seasonal archiving, workers naturally tend to fill cabinets and shelving units at chest or eye level first for convenience. This shifts the center of gravity of the furniture dangerously high.
A lateral file cabinet operates as a mechanical lever. When a top drawer is fully loaded and extended, it pulls the unit's center of gravity forward, past the front edge of its wheelbase. If the bottom drawers are empty, removing the necessary counterweight that keeps the unit anchored to the floor, the entire cabinet rotates forward longitudinally. The resulting tip-over transforms a stationary piece of office equipment into a falling object capable of inflicting severe crush injuries to the legs, torso, or head.
Three Patterns Worth Knowing
- The Center of Gravity Shift
- Loading top drawers or upper shelves first moves the center of gravity upward, making the unit inherently unstable before a drawer is even opened. - Opening a loaded top drawer pulls that elevated center of gravity forward, initiating a longitudinal tip-over as the weight extends past the front footprint. - Leaving bottom drawers empty fails to provide the critical counterweight required to keep the unit grounded during normal operation.
- Defeated Engineering Controls
- Modern lateral file cabinets are manufactured with mechanical interlocks designed to prevent more than one drawer from opening simultaneously. - Over years of use, or during aggressive office moves, these internal latches frequently break, become misaligned, or are intentionally bypassed by staff trying to access multiple files. - When this engineering control fails, workers can open multiple loaded drawers at once, practically guaranteeing a forward collapse.
- Unanchored Freestanding Units
- Tall shelving units, bookcases, and storage racks are often placed against office walls without being physically anchored to the structural studs. - Uneven flooring, thick carpeting, or the dynamic load of a worker stepping on a lower shelf to reach an upper tier can easily cause the unit to fall forward. - Freestanding does not mean securely stored; unanchored heavy furniture creates a recognized crush hazard that must be secured.
What This Means For Your Crew
We need to actively identify and control these hazards before we start moving or archiving files today. We must apply the hierarchy of controls to manage this risk effectively, in order: elimination, substitution, engineering, administrative, and PPE. What is the highest-order control we can use TODAY?
- Elimination: Can we digitize these files and remove the need for heavy physical storage entirely?
- Substitution: Can we swap tall, freestanding shelving for lower, wider horizontal storage units that cannot physically tip over?
- Engineering: Are our tall cabinets physically anchored to the wall studs, and are the mechanical drawer interlocks functioning correctly?
- Administrative: Are we strictly following a load from the bottom up, empty from the top down procedure?
- PPE: Not applicable for office tip-over hazards; we must rely on higher-order controls to prevent the event.
Note: Discussion prompts: Where is the energy and exposure in our workspace right now? Which cabinets in our area are loaded top-heavy? What's the first sign we're going off-plan during an archiving project?
Note: Stop-work authority: Every worker can stop work for an unsafe condition. If you feel a cabinet tipping, or notice multiple drawers opening at once, pause the work and tag the unit out of service immediately. There will be no retaliation for speaking up or stopping work.
Note: Verification question: Do we HAVE the controls right now—are the mechanical interlocks functioning and are tall shelves anchored to the wall?
Note: Comprehension check: What are we doing differently today when loading or unloading files?
Note: Close-the-loop: The Facilities Manager will report back at tomorrow's huddle on the status of the cabinet and shelving checks.
Action Steps
- Walk the office and physically test lateral file cabinets to ensure only one drawer can open at a time. Owner: Facilities Manager Due: Today by 2:00 PM
- Identify all freestanding shelving units over 5 feet tall and verify they are securely anchored to wall studs. Owner: Safety Rep Due: End of Shift
- Reorganize any top-heavy cabinets by moving the heaviest files and supplies to the bottom drawers to establish a safe counterweight. Owner: All Staff Due: Ongoing