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 the types of excavation hazard?
More excavation-related hazards
- falls into trenches or excavations.
- tripping over equipment, debris and spoil.
- excavated material or other objects falling on workers.
- exposure to underground services or overhead electrical cables.
- unstable adjacent structures.
- mishandled or poorly placed materials.
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 some dangers of excavations lack of oxygen?
Other trench and excavation risks include:
- Asphyxiation due to lack of oxygen.
- Inhalation of toxic materials.
- Exposed utility lines, underground and overhead.
- Falling objects.
- Water in the excavation.
- Moving machinery near the edge of the excavation could cause a collapse.
- Vehicle traffic.
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.
When you fall you should always try to?
Instead, if you feel yourself falling, experts said you should bend your elbows and knees and try to take the hit on the fleshiest parts of your body, like the side of your thigh, buttocks and shoulder.
What is excavation in safety?
Excavation work involves the removal of. soil or a mixture of soil and rock, and even. some of the most experienced workers. have been trapped, buried and injured in.
What is the safest way to get into and out of a deep excavation?
Battering the excavation sides – Battering the excavation sides to a safe angle of repose may also make the excavation safer. In granular soils, the angle of slope should be less than the natural angle of repose of the material being excavated. In wet ground a considerably flatter slope will be required.
Which of the following is the deadliest excavation hazard?
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 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.