Scaffold Failure in Chapecó: Safety Lifeline Saves Another Life

In work at height, the difference between a near-miss and a fatal accident lies solely in safety redundancy. On the morning of Tuesday, July 7, 2026, a mechanical failure on a suspended scaffolding platform left an operator dangling at approximately 25 meters high at a building construction site in downtown Chapecó (SC). This case is a clear practical demonstration of how strict compliance with NR 35 prevents fatalities.

The Incident: Scaffold Brake Failure in Downtown Chapecó

The worker was carrying out rendering and finishing tasks on the external facade of the building when one of the hoist brakes of the mechanical platform failed. The scaffold tilted sharply, causing the worker to lose footing.

However, the fall was instantly arrested. The operator was wearing a professional full-body safety harness connected to a fall arrester (trava-quedas) attached to an independent safety lifeline. He remained safely suspended along the building facade, avoiding any contact with the ground.

The Military Fire Department of Santa Catarina executed a complex high-angle rescue operation. Using rope access and rescue techniques, the fire rescue team safely lowered the worker to the ground after approximately an hour and a half of suspension. The worker was examined by paramedics and discharged without physical injuries.

How Safety Redundancy Saved the Construction Worker

The success of this rescue stems from a fundamental engineering safety concept: **structural redundancy**. Regulatory Standard 35 (NR 35) mandates that the worker must never be anchored to the same structure supporting their work platform (the scaffold).

An independent safety lifeline, made of steel cable or high-tenacity synthetic fiber rope, is anchored securely to the top of the building (using structural eyebolts or beams compliant with NR 18). This ensures that any mechanical collapse, cable snap, or brake failure on the platform does not compromise the worker's anchor line.

The Hidden Hazard: Suspension Trauma Syndrome

Rescuing a suspended worker must be carried out swiftly and systematically due to the risk of Suspension Trauma Syndrome (harness-induced pathology or orthostatic shock).

When a person hangs motionless vertically in a harness, the leg straps compress the femoral veins, blocking blood from returning from the lower limbs to the heart. This pooling of blood can cause dizziness, loss of consciousness, and, in severe cases, brain death or circulatory failure in less than 15 to 20 minutes.

To mitigate this hazard, NR 35 regulations require:

• Emergency and Rescue Plan: Every high-altitude work site must feature trained rescue personnel and rapid rescue kits to retrieve suspended workers in minimum time.
• Suspension Trauma Relief Straps: Loop straps attached to the harness that the suspended worker can deploy to step on. This allows them to flex their leg muscles, relieving pressure on the femoral veins and maintaining cardiac return.

The Role of Collective Fall Protection netting (EPC)

While personal fall protection (EPI) worked flawlessly in the Chapecó incident, high-rise safety is optimized when paired with collective barriers. Installing **safety netting (console or catch nets)** creates a secondary catch perimeter. This not only protects falling workers but also intercepts dropped tools or masonry rubble, securing pedestrians on the streets below.

Safety nets certified under the **ABNT NBR 16046** standard ensure that fixing consoles and meshes possess the dynamic energy absorption capacity necessary to stop high-velocity impacts safely.