Page 47 - HUB-4 Magazine Issue 83

Quarrying News
Guarding By Location: Danger and Compliance
The global leader in conveyor safety is disputing the idea that putting conveyor equipment out of reach or inconveniently placed away from workers -- known as “Guarding by Location” -- is a valid form of safety. After decades of safe equipment design and comprehensive conveyor safety training in the bulk handling industry, Martin Engineering experts have witnessed where “guarding by location” has led to a lapse in workplace safety, resulting in injuries and – in some cases -- fatalities.
Most people readily accept that conveyors and other machinery require safety guards when positioned near workers or walkways. Guarding by location is the assumption that when hazards, such as moving conveyor belts, are positioned beyond the normal reach of a worker they don’t require a guard. Yet they can still present a serious hazard.
Most regulations do not account for the potential buildup of spillage underneath the conveyor or in walkways, which can easily change the distance between the working surface and a hazard. It’s also fairly common practice to purposely collect a pile of material or fill a bin to gain access for service or inspection of an elevated component. Using tools and methods that extend a worker's reach while the belt is running is a hazardous activity that can contribute to serious -- and possibly fatal -- accidents.
Unguarded return rollers over walkways can fall and produce a serious hazard.
Worker Risks from Guarding by Location
Some regulations define a general safe height for components based on the average height of workers. This means taller employees (1.82 m / 6 ft. in height or more) can easily suffer an injury reaching up into a moving component that is 2.13 m / 7 ft above the ground. Working above machinery that is considered guarded by location exposes workers to increased severity of injury if they slip or fall to a lower level.
Reach-in hazards (“breaking the plane”) can apply to both the mesh size and the height of the barrier.
Height prevents a worker from reaching hazardous areas until the reality of bulk operations proves otherwise.
Hazards From Above
By not requiring a physical barrier, guarding by location creates what is considered by some to be an exception to the general requirements for the guarding of hazards in the workplace. Several hazardous locations are beyond the normal reach of staff when working or walking under or around elevated conveyors. These hazards are commonly found in or around nip points between the belt and return rollers or drive components such as pulley shafts, couplings, drive belts, gears and chains. Additional hazards from falling components may be inadvertently ignored if considered guarded by location.
Return roller guards ensure detached rollers don’t pose a hazard to workers or harm the system.
www.hub-4.com Nov/Dec- Issue 83
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