Mechanical and Safety Engineering (MASE) Product Failure Injury Report
Product involved: Tricam Fiberglass Ladder
What happened: A person was injured when a spreader bar of his Tricam ladder failed, causing the ladder to collapse
Injuries: Unknown
Recommendations: Stepladder spreader bar failure is not as common as other ladder accident failure modes. Without spreader bars, a stepladder is highly unstable and likely to collapse or tip. Normally spreader bar failures are due to a manufacturing or material defect, but can also be due to a design problem as well. A rigid plate spreader would have prevented the extreme instability resulting from the failure of one spreader bar connection.
OSHA/Standard violations?: No
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Tuesday, February 26, 2013
Tuesday, February 19, 2013
Concrete Form Pin Connection Failure
Mechanical and Safety Engineering (MASE) Product Failure Injury Report
Product involved: Concrete Forms/Pin Connection
What happened: A worker was injured while attempting to disassemble steel forms for concrete. A pin that supported the forms failed resulting in the form dropping onto the worker’s head.
Injuries: Head injuries
Recommendations: Positioning of connections can be important for these types of structures. It is important for the connections to be accessed safely, without getting underneath the forms in a crush zone. Positioning connections so that the forms can be broken from the side would prevent these types of accidents
OSHA/Standard violations?: unknown
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Product involved: Concrete Forms/Pin Connection
What happened: A worker was injured while attempting to disassemble steel forms for concrete. A pin that supported the forms failed resulting in the form dropping onto the worker’s head.
Injuries: Head injuries
Recommendations: Positioning of connections can be important for these types of structures. It is important for the connections to be accessed safely, without getting underneath the forms in a crush zone. Positioning connections so that the forms can be broken from the side would prevent these types of accidents
OSHA/Standard violations?: unknown
Visit www.mase.pro for more information on unsafe products
Tuesday, February 12, 2013
Hydraulic Fitting Failure Causes Dump Truck Bed to Fall
Mechanical and Safety Engineering (MASE) Product Failure Injury Report
Product involved: Dump Truck
What happened: A maintenance worker was killed when the raised bed of a dump truck fell onto him due to the failure of a hydraulic fitting which allowed the hydraulic pressure to drop rapidly
Injuries: Death
Recommendations: A check valve on the hydraulic system would have prevented loss of pressure due to the fitting failure. Also additional means of supporting the weight of the truck bed would have prevented the bed from falling when the hydraulic fitting failed.
OSHA/Standard violations?: unknown
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Product involved: Dump Truck
What happened: A maintenance worker was killed when the raised bed of a dump truck fell onto him due to the failure of a hydraulic fitting which allowed the hydraulic pressure to drop rapidly
Injuries: Death
Recommendations: A check valve on the hydraulic system would have prevented loss of pressure due to the fitting failure. Also additional means of supporting the weight of the truck bed would have prevented the bed from falling when the hydraulic fitting failed.
OSHA/Standard violations?: unknown
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Tuesday, February 5, 2013
Wood Chipper Accident
Mechanical and Safety Engineering (MASE) Product Failure Injury Report
Product involved: Wood Chipper
What happened: A worker became pulled into a wood chipper when the bundle of branches he was feeding into the chipper trapped his hand
Injuries: Amputation
Recommendations: Wood chippers are extremely powerful machines that have an entanglement hazard between the powered rollers that pull material into the chipper. These machines should be guarded with as much care and attention to detail as large printing presses. The operator should never be able to reach the point of operation of the chipper. Equipping the chipper with an effective body bar that stopped the machine would have prevented this accident, as would have a deadman platform that the operator would work from that would stop the chipper when it sensed the lack of a person.
OSHA/Standard violations?: no
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Product involved: Wood Chipper
What happened: A worker became pulled into a wood chipper when the bundle of branches he was feeding into the chipper trapped his hand
Injuries: Amputation
Recommendations: Wood chippers are extremely powerful machines that have an entanglement hazard between the powered rollers that pull material into the chipper. These machines should be guarded with as much care and attention to detail as large printing presses. The operator should never be able to reach the point of operation of the chipper. Equipping the chipper with an effective body bar that stopped the machine would have prevented this accident, as would have a deadman platform that the operator would work from that would stop the chipper when it sensed the lack of a person.
OSHA/Standard violations?: no
Visit www.mase.pro for more information on unsafe products
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