Spot it before it hurts someone: a nine minute hazard recognition module

The site walk-through

Spot it before it hurts someone.

You will walk a jobsite on a fixed route, name what you find, and pick the control that will actually hold.

9 min10 screensOne safer walk-through

Look closely. The everyday details matter.

What you will be able to do

Name the four zones of a walk-through, in order.
Identify six common hazards in a site scene.
Choose the strongest control a situation allows.
Decide whether work continues or stops.
Build a walk-through card you can carry.

Why this matters

Most people can point at a hazard once it is pointed out to them. The hard part is seeing it on the fourteenth morning, in the same doorway you have walked past thirteen times. That is what a method is for.

How this works

Ten screens, about nine minutes. Nothing is timed. Optional audio introductions include transcripts. Tab moves between controls; Enter or Space chooses. Arrow keys move between tabs. The hazard hunt also has a keyboard-accessible inspection list.

Who this is for

Anyone who walks a site and can call a stop: foremen, supervisors, safety leads, and the trades working alongside them.

This is a teaching demonstration. It is not a substitute for a site-specific safety program, a competent person on site, or the training your project actually requires.

The walk-through method

Walk the same four zones in the same order, every time. A route beats a wander, because a wander only finds what is already bothering you.

Access and egress.
How people get in, how they move, and how they would get out in a hurry. Gates, stairs, ladders, walkways, exits.
Work at height.
Every edge, every opening, every platform, and everything that could fall off one onto somebody below.
Energy and equipment.
Temporary power, cords, panels, fuel, pressure, and anything that turns, lifts, or holds a load.
Housekeeping and materials.
Debris, staged material, trip hazards, and the protective equipment that is either being worn or is sitting in a truck.

A fixed route beats a sharp eye, because the eye is the part that gets tired.

You stop seeing what you walk past. Familiar ground goes invisible fast. A route forces you to look at the doorway you always cut through.
It survives a bad morning. When the day is already sideways, a habit still runs. Judgment on its own does not.
It produces a comparable record. The same four zones every day means today's list can be read against last Tuesday's.
It is teachable. A new foreman can run your route on day one. Nobody can run your intuition.

Walk it at the start of the shift, and again after any change: a delivery, a new trade on site, weather, or a crew working late.

Zone one: access and egress

Start where people start. If the way in is wrong, everything after it happens to people who are already off balance.

Set on firm, level ground, at roughly a one to four angle, with the base secured against kicking out.
For landing access, side rails extend at least 3 feet above the landing. If that is impossible, secure the top to a rigid support and provide a grasping device as required.
Rungs clean and dry; no damaged parts or makeshift repairs. Do not stand on a stepladder's top cap.
Used for access, not as a work platform for anything that needs two hands and a reach.

Side view of an access ladder with extended rails, a secured landing and a firm base. — **A secure way up**Check the setup, the landing handhold and the base before anyone climbs.

Clear full width, with no material staged in the path and no cords crossing it.
Handrails in place, including on temporary stair towers.
Lit well enough to see the tread edge, including in the stairwell nobody uses until the fire alarm goes off.

A clear path, every stepKeep the route open, the tread edges visible and the handrail in place.

Marked, unlocked, and clear on both sides of the door.
Never the convenient place to set a pallet, because it is always the convenient place to set a pallet.

Clear on both sidesFollow the exit route all the way through the door, not just up to it.

Zones two and three: height and energy

Two zones that share a habit: the hazard is usually created by somebody doing the right thing badly, or doing the right thing and not putting it back.

Walk every leading edge, every stair opening, every shaft, and every place a guardrail was taken out to land material.
Guardrails: top rail, mid rail, and a toe board where anything could be kicked off onto people below.
Floor openings covered with something that cannot slide, cannot be mistaken for scrap, and is marked so it reads as a cover.
Protect the opening whenever anyone could be exposed. Restore the rail as soon as material handling ends, with required fall protection while it is removed.

Raised platform with highlighted top rail, mid rail and toe board along its exposed edge. — **Follow the whole edge**Look for gaps in protection, including where a rail was removed for a delivery.

Cords out of walkways and up off wet ground. If a cord has to cross a path, it gets a ramp or it goes overhead.
Check required ground-fault protection. It rapidly interrupts a ground fault and reduces shock risk; it does not make wet or damaged equipment safe.
No damaged jackets, no missing ground pins, no daisy chain of strips feeding a heater.
Panels closed, labeled, and not being used as a shelf.

An electrical cable crosses a walking route inside a protective ramp. — **Protect the crossing**Keep cords out of the route. Where crossing is necessary, protect the cord and the people.

Follow the applicable energy-control procedure. Before electrical work, a qualified person verifies exposed parts are deenergized and addresses stored energy and other sources.
The person doing the work puts their own lock and tag on it, and only that person takes it off.
Stored energy counts too: springs, raised loads, pressure, and capacitors do not care that the breaker is off.
If you find a machine open with no lock on it, that is a stop, not a note for later.

Off is only the beginningFollow the energy-control procedure, including verification and stored-energy controls.

Zone four: housekeeping and protective equipment

Housekeeping is the zone people skip because it feels like tidiness. It is not tidiness. The injuries it prevents are the ordinary ones: a slip, a trip, a puncture through a boot, a stack that lets go.

Cut offs, banding, strapping and packaging cleared as the work makes them, not at the end of the week.
Bins where the work is. A can forty feet away is a can nobody walks to.
Standing water tracked back to its source, because the puddle is a slip and often an electrical problem wearing a disguise.
Protruding rebar and fasteners capped or bent over, including the ones at shin height nobody can see.

Clear walking route with a nearby waste bin and offcuts collected outside the path. — **Clear as the work happens**Keep debris out of the walking route and put a bin close to the work.

Staged out of walkways, off exits, and away from edges and openings.
Stacked on level ground, bound or blocked, and not higher than the stack can hold itself.
Loads checked for weight on the deck before they go up, not after somebody notices the deflection.

A low stack of materials on a level base, with highlighted restraints and blocks. — **A stable place to land**Check the ground, the restraint and the location before material is staged.

Present is not the same as worn. Look at heads, eyes, feet, hands and ears, not at the box by the gate.
Fitted and in usable condition: a cracked shell, a scratched lens or a torn glove is decoration.
Matched to what is actually happening right now, including work happening overhead by somebody else.
Protective equipment is the last layer, not the plan. If it is your only answer, look at the four levels above it.

Worker wearing a hard hat, protective eyewear and a high-visibility vest; equipment must match the task. — **Worn. Fitted. Task-matched.**Check the person doing the work. Equipment in a box protects nobody.

Hazard hunt

Inspect the scene and select anything that needs attention. You can also use the six locations in the inspection list.

Found 0 of 6.

Inspect all six locations to continue. Assistance is always available.

Fictional two-story construction site. Inspect the upper deck, ladder at right, wet foreground walkway, left doorway, ground-floor worker and marked exit at right. Use the adjacent inspection list for the same six locations.

Inspection list

The hierarchy of controls

Finding a hazard is half the job. The other half is choosing a control, and controls are not equal. Work down this list and stop at the strongest one that is realistic in the situation.

Elimination. Remove the hazard. The task does not happen, or it happens somewhere it cannot hurt anyone.
Substitution. Swap in something less harmful that does the same job.
Engineering controls. Change the physical setup so the hazard cannot reach people: guardrails, covers, ventilation, water on the blade, a barrier.
Administrative controls. Change how people work around it: sequencing, permits, training, signs, limits on who goes where and when.
Protective equipment. The last layer, worn by the person, protecting only that person, only while it is on and fitted.

Elimination removes the hazard. Substitution replaces it with a safer alternative. Engineering controls change the physical setup. Administrative controls and protective equipment depend more on correct use. Several layers may be needed.

Drag a control onto the situation, or select it and tap the placement area.

Placed 0 of 6.

The interactive activity needs JavaScript. You can still read each scenario and open its worked example below.

Reroute the drain

A trench has to be cut through a finished slab to reach a drain line. The design team confirms the line can be rerouted overhead instead, on the same schedule and with the same result.

Review the worked example

Reroute the line overhead. Elimination. Rerouting removes this cutting task and its associated exposure. Assess the new route too: other hazards may still need controls.

Tool-cleaning room

A crew cleans tools with a strong solvent in a small room. A water-based cleaner does the same job and has been assessed as less hazardous for this task.

Review the worked example

Swap to the assessed cleaner. Substitution. Same task, same tools, less harmful material. The room does not change and the crew does not change, so the swap holds even when nobody is watching.

Indoor block cutting

Workers are cutting concrete block indoors and dust is filling the room. The cuts are field fits, so the pieces cannot be ordered pre-cut.

Review the worked example

Control dust at its source. Engineering controls reduce dust at its source. Use the task-specific controls, work practices and any respiratory protection required by the silica exposure-control plan.

Open second-floor edge

An open edge runs along the second floor where crews cross all day. The edge is part of the building and it is going to be there for the next three months.

Review the worked example

Install a physical barrier. Engineering controls. A guardrail is a physical barrier that works whether or not anybody is thinking about the edge, and it protects the person who is walking backwards carrying a sheet of plywood.

Shared stairwell

Two crews need the same stairwell: one running conduit overhead from a platform, one carrying material up. The stairwell is the only route and neither crew can move.

Review the worked example

Separate the crews in time. Administrative controls. Neither crew can move and the stairwell cannot be changed, so the control is sequencing: separate the two in time, and make the split a named responsibility rather than a hope.

Screened grinding bay

A welder is grinding in a screened bay with local exhaust running and nobody else in the area. The sparks and the noise are as contained as the setup can make them.

Review the worked example

Add task-matched protective equipment. Protective equipment. Everything above it has already been done: the work is screened, exhausted and isolated. Face and hearing protection is the honest last layer here, not a shortcut.

Inspect before release

Open each location and read the field notes. Place a hold marker wherever the described work must stop. Leave the other locations unmarked, then review your inspection.

Inspected 0 of 8. 0 holds.

The interactive activity needs JavaScript. You can still read each scenario and open its worked example below.

Access ladder

The access ladder is in good condition, set at the correct angle on a firm base, secured, and its side rails extend at least 3 feet above the landing.

Review the worked example

Go for the conditions described: good condition, correct angle, firm base, secured, and side rails at least 3 feet above the landing.

Wet walkway

A cord feeding a work light runs across the main walkway and sits in the puddle at the low spot.

Review the worked example

Stop. Keep people clear. Do not touch the cord or enter the water. Have an authorized person make the supply safe before inspection or rerouting.

Floor opening

A floor-hole cover is verified to support at least twice the combined load that may be imposed. It is secured against displacement and clearly marked COVER.

Review the worked example

Go for the stated conditions: the cover has verified load capacity, is secured against displacement, and is clearly marked.

Delivery edge

A guardrail section was taken out to land material, and the crew left for lunch with the edge open.

Review the worked example

Stop. Prevent access to the exposed area until compliant fall protection is restored. An unattended open edge cannot wait until the end of the shift.

Overhead work

A worker is grinding overhead in eye protection while another crosses underneath with nothing on their head.

Review the worked example

Stop. Eye protection covers the grinder, not the person underneath. Either the crossing stops or the overhead work stops, and either way somebody puts a hard hat on.

Housekeeping route

Bins are set at each work area. The current walk-through confirms the walkways remain clear, with debris removed as work continues.

Review the worked example

Go for the conditions described: the current inspection confirms clear routes, with debris removed as work continues.

Electrical panel

Before panel work, the required energy-control procedure is complete. A qualified person has verified exposed parts are deenergized and addressed stored energy and other sources.

Review the worked example

Go for the stated conditions: the required procedure is complete, and a qualified person has verified exposed parts are deenergized and addressed other energy sources.

Emergency exit

Block is stacked chest high on the walkway, directly in front of the marked exit door.

Review the worked example

Stop. Move it now. Exits get blocked because they are convenient, and they get discovered on the one day nobody has a minute to spare.

Spot it before it hurts someone