You asked: 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.

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 is the most common and severe hazard during excavations?

There are many potential hazards when working in excavations and trenches. Probably the most common hazard at any work site is the threat of cave-in. A cave-in occurs when walls of an excavation collapse. Cave-ins can be deadly.

What are some of the 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.
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What causes the most deaths in excavations?

Falls are the leading cause of fatalities in construction. They account for approximately 1/3 of all deaths in the construction industry. These usually occur from not having proper safety nets for holes, unguarded protruding rebar where impalement happens, not stabilizing portable ladders, poor scaffold construction.

What depth do you need shoring?

Trenches 5 feet (1.5 meters) deep or greater require a protective system unless the excavation is made entirely in stable rock. If less than 5 feet deep, a competent person may determine that a protective system is not required.

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 the four trench hazards that could exit?

Trench and Excavation Hazards

  • 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.

What are the safety precautions for excavation?

Avoid underground services and make sure not to undermine nearby structures – use safe digging practice and dig away from them. Check the excavation each day before starting work and after any event that may affect its stability. Provide safe access to get in and out. Prevent collapse – shore, bench, or batter back.

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.

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What are the three methods of excavation?

Types of excavation

  • 3.1 Cut and fill excavation.
  • 3.2 Trench excavation.
  • 3.3 Basement excavation.
  • 3.4 Road excavation.
  • 3.5 Bridge excavation.
  • 3.6 Dredging.
  • 3.7 Over excavation.


What type of soil is least stable?

OSHA classifies soils into four categories: Solid Rock, Type A, Type B, and Type C. Solid Rock is the most stable, and Type C soil is the least stable. Soils are typed not only by how cohesive they are, but also by the conditions in which they are found.

What type of soil Cannot be benched?

Type C soil cannot be benched.

How many cave-in accidents happen every year in the US?

Currently, those statistics (as reported by the U.S. Bureau of Labor Statistics) show that there were 36 excavation or trenching cave-in deaths across all U.S. industries in 2016, a number that nearly equals those figures for the previous two years combined.

Is it possible to be struck by a vehicle you are operating OSHA?

Vehicles, Falling and Flying Objects, and Masonry Walls

Too many construction workers die on the job when they are 1. struck by a vehicle; 2. struck by a falling or flying object; 3.

How can you control water around an excavation?

CONTROL OF GROUND WATER. Dewatering is the process of removing water from an excavation. Dewatering may be accomplished by lowering the groundwater table before the excavation is begun. This method of dewatering is often used for placing pipelines in areas with high groundwater levels.

Special equipment and operation