The Three Most Overlooked Fatal Risks in Working at Height

Falls are the leading cause of death in construction. Yet many companies still have critical blind spots in their protection programs. The issue is usually not the absence of safety measures, but the failure to address risk points that are easy to overlook. This article highlights three of the most common gaps in fall protection—and how to close them.

1. Hidden fall hazards

Large, visible openings are often well protected. The real danger is usually in places that look safe.

1) Skylights and roof lights: the least obvious killer

When workers see glass or plastic covering an opening, they often assume it can be stepped on—or even used as a place to sit and rest. But a skylight is, in essence, still a hole in the roof. Its purpose is to keep out animals, debris, rain, and snow, not to bear human weight. If a skylight is rated for 80 kg and a 90 kg worker steps onto it, the result can be a fatal fall.

2) Ladders: a seriously underestimated risk

Many people see ladders as simple tools rather than part of “work at height,” so they overlook the need for fall protection. That is a dangerous misconception. Any task involving elevation should be included in the company’s fall protection management system—including ladder work.

3) Other hidden risk points

Key prevention measures

Carry out regular professional risk assessments
Do not focus only on large, obvious openings. Risks should be reassessed whenever work phases change, workers move to a new site, or weather conditions shift.

Identify hidden hazards for new workers before they start
Safety supervisors should walk new employees through the site, point out all concealed hazards one by one, and document the acknowledgement.

2. Equipment failure can be more dangerous than having no equipment at all

A safety harness may look intact while gradually deteriorating. Faulty protective equipment creates a false sense of security—and that can make the outcome even worse.

Common failure modes of safety harnesses

• UV exposure
  → webbing strength degrades

• Repeated bending and flexing
  → metal parts develop fatigue cracks

• Sweat, oil, and chemical contamination
  → corrosion, rust, and mildew

• Hidden internal damage
  → the surface appears normal, but internal fibers have already broken

Hidden damage is the most dangerous, because failure may occur suddenly only when the equipment is loaded—and by then, it is too late.

A three-level inspection system

1) Routine inspection (before each use, by the worker)

Under GB 6095, each harness should be checked visually and by touch before every use:

• Webbing: cuts, abrasion, discoloration, contamination

• Metal components: corrosion, deformation, cracks

• D-rings: secure attachment

• Buckles and connectors: proper opening and closing function

2) Annual inspection (by a qualified body)

• Assess integrity of internal fibers

• Test strength of metal components

• Issue a formal inspection report

• Apply an inspection label showing the next due date

3) Equipment files and inspection records

Each harness should have its own record file documenting routine checks and annual inspections. These records are more than an administrative formality—they are evidence that the company has fulfilled its safety responsibilities. In the event of an accident, the completeness of inspection records may directly affect legal liability.

3. Without timely rescue, protection only delays tragedy

Even the best fall protection equipment cannot prevent a fatal outcome if there is no fast, effective rescue system behind it. In that case, protection may only delay the tragedy rather than stop it.

The golden rescue window: 15 minutes

When a worker is left suspended in a harness, the body can deteriorate very quickly:

This condition is known medically as suspension trauma. A worker who appears alive after rescue may still die hours later if not treated properly.

What a complete emergency rescue plan should include

1) A dedicated rescue team

• At least two trained personnel on standby

• Clearly assigned roles and responsibilities

2) Rescue equipment that is always ready

• Rescue ropes, pulley systems, stretchers

• Radios, first-aid kits, emergency lighting

• Equipment lists posted in visible locations and checked regularly

3) A clear rescue process

Detection → alert → arrival within 2 minutes → assessment → controlled lowering → first aid → hospital transfer

4) Regular drills

• At least once every quarter

• Record response times and review lessons learned

• Involve local medical or fire services where possible

5) Protection for rescuers as well

• Rescuers must use an independent fall arrest system

• They must never share the suspended worker’s rope or equipment

• A rescuer’s fall will only escalate the incident