Applying established OSHA safety concepts to the specific question most hand-safety programs miss: where does the hand enter the hazard?
The HSF Exposure Control Framework™ does not replace OSHA requirements. It provides a practical hand-exposure lens for applying familiar safety principles to industrial tasks involving lifting, rigging, load positioning, machinery, striking tools, sling handling and closing gaps.
HSF is not an OSHA standard, OSHA certification, or legal compliance substitute. Employers remain responsible for identifying and complying with all applicable OSHA requirements, applicable regulations, and local legal obligations. This page explains how HSF concepts can support the practical field implementation of recognised safety principles and the existing hierarchy of controls.
OSHA's regulatory framework identifies the hazard categories most likely to cause serious injury and fatality across industrial and construction settings. For hand safety, four of these concepts are especially relevant — they describe precisely the circumstances in which hands and fingers are most often crushed, amputated, or struck.
OSHA's Construction Focus Four identifies caught-in or caught-between hazards as situations where workers become trapped, crushed, or compressed between objects, equipment, or machinery. OSHA Focus Four For hand-specific exposure, this is the classic closing-gap event: the hand is between the load and the landing surface, or between a rotating part and a fixed structure.
OSHA describes struck-by injuries as resulting from forcible contact or impact between a person and an object or piece of equipment. OSHA Focus Four In manual industrial tasks, this includes the hand in the strike line of a slogging spanner, a hammer on a drift pin, or a suspended load swinging under tag-line control.
OSHA requires that any machine part, function, or process that may cause injury must be safeguarded. OSHA 29 CFR 1910.212 Where guarding is absent or bypassed, the hand-entry question becomes critical: what is the specific reach path, and what causes the worker to take it?
OSHA's control of hazardous energy standard requires the isolation of energy sources before workers perform maintenance or service work on equipment. OSHA 29 CFR 1910.147 LOTO removes the energy that creates the hazard. HSF asks the accompanying question: even after isolation, where does the hand enter, and is that entry necessary?
OSHA's hierarchy of controls gives priority to engineering controls — physical modifications that eliminate or isolate the hazard at the source. HSF applies this principle specifically to the hand-exposure pathway: the preferred outcome is task redesign that removes the reason for hand entry altogether.
OSHA recognises PPE as the last line of defence — appropriate when hazards cannot be adequately controlled by other means. Cut-resistant gloves and impact gloves reduce injury severity; they do not reduce exposure. HSF applies this distinction rigorously: PPE selection follows exposure analysis, it does not substitute for it.
"OSHA identifies the hazard category. The missing question is: exactly where does the hand enter — and what causes the worker to put it there?"
HSF Exposure Control Framework™ · First PrincipleMany industrial safety programmes identify the hazard category correctly. A suspended load is a caught-between hazard. A slogging spanner is a struck-by scenario. Rotating machinery requires guarding. These classifications are accurate, necessary, and form the foundation of a compliant safety system.
What they typically do not map is the precise hand-entry point: the specific millimetre of space, the specific moment in the task, and the specific operational reason that causes the worker to place a hand inside the hazard zone. Without that map, the control is incomplete.
OSHA plant-wide hazard guidance discusses injuries caused by struck-by, struck-against, or caught-in machinery, including fractures, puncture wounds, amputations and fatalities. OSHA General Industry These outcomes all follow from a common sequence: the hand enters, and energy is applied. HSF works backward from that sequence to remove the entry point.
"The Last 300 mm Rule™ — when a closing gap reaches its final 300 mm, the hand must already be clear. That is not the moment to adjust; it is the moment the hazard becomes unavoidable."
HSF Exposure Doctrine™The table below maps established OSHA safety concepts to the HSF hand-exposure question that accompanies each, and identifies the practical control direction that follows from that question.
| OSHA Concept | Typical Safety Focus | HSF Hand-Exposure Question | Practical Control Direction |
|---|---|---|---|
| Caught-in / Caught-between | Identify pinch and entrapment points; maintain safe distances from moving equipment | Where exactly does the hand enter the closing gap, and at what point in the task? | Use distance tools to position loads; apply the Last 300 mm Rule™; eliminate the need for hand entry |
| Struck-by hazards | Clear line-of-fire zones; use barriers; control dropped objects | Is the hand in the strike path? What is the operational reason the hand must be there? | Use tool holders, magnetic holders, and HSF striking tool aids to remove the hand from the strike line |
| Machine guarding | Ensure guards are in place and effective before operation | If guarding is removed for maintenance, what is the reach path and what drives it? | Map hand-entry paths during LOTO task planning; use extension tools where reach into unguarded zones is task-required |
| Lockout / Tagout | Isolate all hazardous energy before servicing or maintenance | After energy isolation, where does the hand still enter, and is that entry necessary? | LOTO removes energy; HSF controls the residual hand-exposure path during maintenance tasks |
| Engineering controls | Modify the task, equipment, or environment to eliminate or reduce the hazard | Can the task be redesigned so the hand is not required in the hazard zone? | Distance tools, mechanical aids, load-guiding equipment; redesign the task to eliminate hand entry |
| Administrative controls | Safe work procedures, training, job hazard analysis, permit systems | Does the procedure specify where the hand must not be, and at what task stage? | HSF exposure mapping; supervisor checklists; toolbox talks that address the last 300 mm specifically |
| PPE | Select appropriate gloves for the hazard type; ensure correct fit and usage | Is PPE being used as the primary control, or as the final layer after exposure has been reduced? | Select PPE after the exposure level has been assessed and reduced as far as practicable; never select PPE as a substitute for distance or barrier controls |
The general hierarchy of controls — eliminate, substitute, engineer, administrate, protect — remains fully valid. HSF does not alter this hierarchy. It applies it specifically and systematically to the hand-exposure pathway, asking at each level whether the hand-entry reason has been removed before descending to the next control tier.
Redesign the task so the hand is not required in the hazard zone. Change the process, the equipment sequence, or the method so that hand entry becomes unnecessary. This is the preferred outcome and the first question HSF asks of every task.
Where hand contact cannot be fully eliminated, use distance tools — magnetic handlers, push-pull tools, load guides, extension handles — to move the hand away from the hazard while completing the task. Measure and increase the separation between hand and hazard.
Use mechanical controls, anti-tangle taglines, and load-guiding equipment to stabilise loads and slow or direct movement. Controlling load energy reduces the consequence if hand distance is temporarily compromised.
Where engineering controls do not fully remove the exposure, use procedures, checklists, training, toolbox talks, and permit conditions that specify hand-exclusion zones, task sequencing, and stop-work triggers — especially for the last 300 mm of any closing operation.
Select PPE — impact gloves, cut-resistant gloves, anti-vibration gloves — appropriate to the residual exposure after all higher-tier controls have been applied. PPE is never the primary control. It is the last layer, selected after exposure has been measured and reduced as far as reasonably practicable.
The following examples apply the OSHA hazard category and the HSF exposure-control question to common industrial tasks. Each example identifies the traditional risk recognition and the additional hand-specific question that drives the control response.
Load suspended overhead creates crush hazard. Workers instructed to stay clear of the load path. Tag lines used to guide direction.
Map the exact hand-entry point: where does the hand reach in to position or steady the load during landing? Apply the Last 300 mm Rule™. Use load-guiding tools to position the load to within tolerance without hand entry into the closing gap.
Shear blade is a severe amputation hazard. Machine guarding required. Workers trained not to reach into the cutting zone during operation.
Identify why scrap retrieval requires hand entry: does material fail to clear automatically? Use magnetic retrieval tools or extension handlers to recover material without reaching across the table. Redesign the retrieval step before relying on training alone.
Struck-by hazard from hammer blow. Workers trained to use proper technique. PPE — impact gloves — specified for the task.
The hand holding the slogging spanner is in the direct strike line. This is a structural exposure, not a behavioural failure. Identify whether a tool holder, magnetic holder, or extended handle can remove the holding hand from the strike path before selecting glove protection.
Load landed; sling under tension or trapped beneath load. Hazard identified as residual movement risk and manual handling.
Where does the hand go to release the sling? Is it under or between the load and the deck? Use a SlingGrab or extended release tool to retrieve and de-tension slings without placing the hand beneath the load or into the gap between load and structure.
Shackle is a pinch and entrapment point. Correct shackle selection and inspection training provided. Workers instructed to handle safely.
Identify whether a finger enters the bow or pin hole during make-up or alignment. Introduce correct sequencing — load the sling leg first, then insert and secure the pin — to eliminate the finger-in-bow habit. Where tools can support pin alignment without finger entry, specify their use.
This checklist supports supervisors in applying hand-exposure thinking to tasks involving OSHA-recognised hazard categories. It does not replace a formal Job Hazard Analysis or OSHA-required risk assessment process.
Hand EntryWhere can the hand enter the hazard zone during this task?
Body PositionWhere can the body enter? Is any body part in the line of fire or in a caught-between zone?
Caught-Between PointIs there a closing gap, pinch point, or entrapment zone in this task sequence?
Struck-By PathIs there a struck-by or line-of-fire exposure — from a load, a tool, or a component under tension or pressure?
Energy IsolationHas machinery been isolated and locked out where required before the task begins?
Machine GuardingIs guarding in place and effective for all equipment involved in or adjacent to this task?
Distance Tools AvailableIs a distance tool — load guide, magnetic handler, extension tool, or tag line — available and specified for use?
Last 300 mm ZoneDoes any part of this task require the hand to be present during the final 300 mm of a closing, landing, or positioning operation?
Stop-Work TriggerHas a stop-work trigger been defined? Does every person on the task know it and have authority to use it?
PPE as Last LayerIs PPE being selected after exposure has been reduced — not as the primary or only control for this task?
OSHA concepts help organisations recognise hazards — classify them, communicate them, and build regulatory frameworks around them. That recognition is essential and cannot be shortcut.
HSF helps teams translate that recognition into a practical field question that the hazard category alone does not answer: where does the hand enter, and how do we remove the reason for entry? The two approaches are not in competition. They address different levels of the same problem.
A team that applies OSHA hazard identification and then asks the HSF exposure question is working at a higher resolution than either framework alone provides.