Struck by a Moving Toolbar — Why Overhead Conveyor Hazards Don't Stop for Elevated Workers

The Toolbar Was Still Moving — What Happens When Elevated Platforms and Active Conveyors Share the Same Space

Let's talk about what happened at Stobag North America Corporation's Burlington manufacturing facility on April 10, 2023. The facility manufactures retractable awnings and outdoor shade systems. One of its production lines is the Powder Coating Line (PCL) drying oven — an automated system where aluminum parts are transported on seven-metre-long toolbars by an overhead conveyor through the oven cycle. A worker was assigned to investigate a recurring issue with an electrical limit switch on the PCL drying oven. To reach the switch, the worker needed to get to an elevated position. They used a powered lift — the type that rises on a vertical mast — and began ascending. While the worker was on the ascending platform, a toolbar being carried by the overhead conveyor moved through the area. The toolbar struck the powered lift. The impact caused the lift to tilt. The worker was not wearing a fall arrest harness. They fell approximately 14 feet to the floor below and sustained critical injuries. A Ministry investigation found that Stobag had no control measures in place to prevent material in motion on the overhead conveyor from striking an elevated work platform. The conveyor was active. The lift was in the path of the toolbars. No one had stopped the conveyor or established a clearance zone before the worker ascended. Stobag pleaded guilty in Burlington/Halton Region Provincial Offences Court and was fined $50,000 plus a 25% victim fine surcharge.

What the Law Requires

Section 25(2)(h) of the Occupational Health and Safety Act requires employers to take every precaution reasonable in the circumstances for the protection of a worker. Basically, what this means is simple: before a worker ascends an elevated platform in the vicinity of an active overhead conveyor carrying large, moving toolbars, the conveyor must be stopped — or the worker must be in a position where the toolbar path cannot reach the platform. These are reasonable precautions. They are not complex engineering challenges. One of them — stopping the conveyor — can be accomplished in seconds. The court found that Stobag failed to implement any control to prevent the overhead conveyor toolbars from striking the elevated work platform. The conveyor was active. The toolbars were moving. The worker ascended without any of those things changing. No one had considered the interaction between the moving toolbar and the elevated platform as a hazard to control before the work began. The absence of a fall arrest harness compounds the injury severity — when the platform tilted, there was nothing to catch the worker. But the root issue is the failure to stop the conveyor or establish a clearance before ascending. In the court's view, this was not a freak industrial accident — it was a foreseeable collision between a moving load and an elevated worker in a shared overhead zone. The $50,000 fine reflects the company's obligation to identify and control this interaction before sending a worker up.

What Supervisors Must Do

• Before authorizing any worker to ascend an elevated work platform in the vicinity of an active overhead conveyor, confirm that the conveyor has been stopped or that the toolbar path has been confirmed clear of the platform position
• Implement a positive control: the conveyor must be de-energized or locked out before any elevated platform work begins in the conveyor zone — not just paused or slowed
• Ensure all workers using elevated platforms in areas with active overhead conveyors or material-handling equipment wear fall arrest harnesses at all times on the platform
• Conduct a pre-task review before any elevated maintenance or investigation task that identifies overhead hazards — including conveyor paths, suspended loads, and overhead equipment — and confirms what must be stopped before ascent
• Keep asking: 'While this worker is elevated, what is moving in the space around that platform — and have we stopped everything that could reach them?'

What Employers Must Do

• Map all overhead conveyor paths throughout your facility and identify all elevated platform work positions that fall within or near those paths; for each intersection, develop a written procedure that specifies the required controls before elevated work begins
• Establish a facility-wide rule: overhead conveyors and material-handling systems must be stopped and locked out before any worker ascends an elevated platform in the conveyor zone
• Include overhead conveyor and moving equipment interactions in your fall protection assessment for all elevated work tasks
• Require fall arrest harnesses as mandatory PPE for all powered lift and elevated platform work in your facility — without exception
• Train all workers and supervisors on the interaction hazards between elevated platforms and active overhead systems; this training must include a stop-work requirement before ascent
• Review all maintenance and inspection tasks that require elevated access near overhead conveyors; develop task-specific procedures that include conveyor lock-out as a precondition step

How to Use This Case in Your Workplace

This case is a valuable safety conversation starter. Use it during toolbox talks before any elevated maintenance or inspection work on production lines with overhead conveyors, monthly safety meetings for industrial supervisors in manufacturing facilities, and fall protection training sessions for workers who use powered lifts. Walk your team through the facility and ask: 'At every point where a worker might use a powered lift on this production floor, is there an active overhead system that could reach the platform — and do we have a procedure that stops that system before ascent?' 'Is every worker who uses an elevated platform in this facility wearing a fall arrest harness — without exception?' 'If the conveyor activated unexpectedly while a worker was on the lift right now, what control would prevent the toolbar from striking the platform?' This case reinforces a simple message: overhead conveyors carrying material are a strike hazard to any elevated platform in their path. The conveyor does not know when a worker is above it. That is the employer's job to know — and to control.