6.2: Caught In or Between Descriptions
- Page ID
- 63509
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Buried in or by
The major hazard related to buried in or by is cave-ins of unprotected trenches and excavations. Cave-ins crush or suffocate workers. In addition, trenches may contain hazardous atmospheres; workers can drown in water, sewage, or chemicals in the trenches; and if working around underground utilities, workers may also face burns, electrocution or explosions from steam, hot water, gas, or electricity. Workers who are working underneath large scaffolds may also be buried if the scaffolds collapse. Workers may be buried and crushed by walls that collapse during demolition.
Example 1: An employee was installing a small diameter pipe in a trench 3 feet wide, 12-15 feet deep and 90 feet long. The trench was not shored or sloped nor was there a box or shield to protect the employee. Further, there was evidence of a previous cave-in. The employee apparently reentered the trench, and a second cave-in occurred, burying him. He was found face down in the bottom of the trench.
Example 2: An employee was working in a trench 4 feet wide and 7 feet deep. About 30 feet away a backhoe was straddling the trench. The backhoe operator noticed a large chunk of dirt falling from the side wall behind the worker in the trench. He called out a warning. Before the worker could climb out, 6 to 8 feet of the trench wall had collapsed on him and covered his body up to his neck. He suffocated before the backhoe operator could dig him out. There were no exit ladders. No sloping or shoring had been used in the trench.
Pinned between
You can be pinned between equipment and a solid object, such as a wall or another piece of equipment; between materials being stacked or stored and a solid object, such as a wall or another piece of equipment; or between shoring and construction materials in a trench. These types of hazards can result in multiple broken bones, asphyxiation, or death.
Example 1: Contractor was operating a backhoe when an employee attempted to walk between the swinging superstructure of the backhoe and a concrete wall. The employee approached the backhoe from the operator’s blind side; the superstructure crushed him against the wall.
Example 2: Four workers were in an excavation approximately 9 feet wide, 32 feet long and 7 feet deep. Steel plates being used as shoring, were placed vertically against the north and south walls of the excavation at a 30-degree angle [no horizontal braces between the plates]. The steel plate on the south wall tipped over, pinning (and killing) an employee between the steel plate and the pipe casing. The backhoe was being operated adjacent to the excavation.