What are some dangers of excavations quizlet?

The dangers of excavations come from the possibility of cave-ins, in addition to the possibility of the lack of oxygen (asphyxiation), fire, accidental break of underground utility lines (such as gas, electricity), collapse due to moving machinery near the edge of the excavations, inhalation of toxic materials, and …

What are some dangers of excavations?

Top 5 excavation safety hazards

  • Cave-ins. Trench collapses kill an average of two workers every month, making this a serious threat to worker safety. …
  • Falls and falling loads. Workers and work equipment can fall into an excavated area. …
  • Hazardous atmospheres. …
  • Mobile equipment. …
  • Hitting utility lines.


What are some of the hazards associated with trenches OSHA quizlet?

  • The greatest risk in an excavation is a cave-in.
  • Employees can be protected through sloping, shielding, and shoring the excavation.
  • A competent person is responsible to inspect the excavation.
  • Other excavation hazards include water accumulation, oxygen deficiency, toxic fumes, falls, and mobile equipment.
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What are the deadliest excavation hazards?

Cave-ins pose the greatest risk and are much more likely than other excavationrelated accidents to result in worker fatalities. Other potential hazards include falls, falling loads, hazardous atmospheres, and incidents involving mobile equipment.

Which of these is known as the greatest danger associated with excavations quizlet?

Cave-ins pose the greatest danger to all excavation workers. Therefore, OSHA requires that workers susceptible to cave-ins be protected from this possibility by sloping, benching, supporting, or shielding the sides of excavations.

What is the greatest risk with excavations?

Cave-ins pose the greatest risk and are more likely than some other excavation-related incidents to result in worker fatalities.

What are 3 main protection methods against cave-ins?

To prevent cave-ins: SLOPE or bench trench walls. SHORE trench walls with supports, or. SHIELD trench walls with trench boxes.

What are some common causes of cave-ins quizlet?

Primary causes of a cave-in include:

  • Vibration.
  • Weight.
  • Noise.
  • Water.

What are some of the hazards associated with trenches?

The hazards include:

  • Cave-ins or collapses that can trap workers.
  • Equipment or excavated soil falling on workers (e.g., equipment operated or soil/debris stored too close to the excavation).
  • Falling into the trench or excavation.
  • Flooding or water accumulation.

Is Fire considered a hazard associated with excavations?

If you are not using protective systems or equipment while working in trenches or excavations at your site, you are in danger of suffocating, inhaling toxic materials, fire, drowning, or being crushed by a cave-in.

What are the 7 types of hazard?

The six main categories of hazards are:

  • Biological. Biological hazards include viruses, bacteria, insects, animals, etc., that can cause adverse health impacts. …
  • Chemical. Chemical hazards are hazardous substances that can cause harm. …
  • Physical. …
  • Safety. …
  • Ergonomic. …
  • Psychosocial.
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How can excavation hazards be prevented?

Provide protection by: Set spoils and equipment at least 2 feet back from the excavation. Use retaining devices, such as a trench box that will extend above the top of the trench to prevent equipment and spoils from falling back into the excavation.

What are the 6 types of hazards in the workplace?

What are the 6 types of hazards in the workplace?

  • 1) Safety hazards. Safety hazards can affect any employee but these are more likely to affect those who work with machinery or on a construction site. …
  • 2) Biological hazards. …
  • 3) Physical hazards. …
  • 4) Ergonomic hazards. …
  • 5) Chemical hazards. …
  • 6) Workload hazards.


What are the three main atmospheric hazards that cause concern?

There are three main atmospheric hazards that cause concern; namely oxygen depletion, flammability, and toxicity. Our monitoring practices and instruments should be geared toward these three central hazards. Oxygen deficiency refers to an atmosphere with a partial pressure of oxygen (pp02) less than 132 mmHg.

What is an evacuation hazard?

Emergency evacuation is the urgent immediate egress or escape of people away from an area that contains an imminent threat, an ongoing threat or a hazard to lives or property.

What type of soil is cohesive and has high unconfined compressive strength?

Type A soil is the MOST STABLE soil in which to excavate. Type A soil is cohesive and has a high unconfined compressive strength; 1.5 tons per square foot or greater. Examples of type A soil include clay, silty clay, sandy clay, and clay loam.

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