Excavation And trenching awareness Flashcards
They are Extremely dangerous and can cause death by way of crushing or suffocation. One cubic yard of soil can weight as much as a car
Cave-ins
A person who is capable of identifying existing and predictable Hazard in surroundings or work area
Competent Person
Man made cut, cavity, trench or Depression in the earth`s surface formed by earth removal
Excavation
Collected Earth/soil displaced by excavation
Spoil pile
A narrow under ground excavation that is deeper than it is wide and no wider than 15 feet (4.5 meters)
Trench
Ensure that all materials, Equipment and soil piles at least _ from edges of the excavation
2 ft
factors that can contribute to a cave
soil type
Water content
Environmental Conditions
Proximity to previous backfilled excavation or trenches
Weight of heavy equipment or tools
Vibrations from nearby machines or vehicles
Tasks performed by the excavation site competent Person
1 Conducting site inspections and mitigating Hazards
2 identifying and classifying soil types
3 Determining Appropriate protective systems to Install based on condition and Hazards
4 Ensuring work sites have safe access and Egress
5 Monitoring water removal equipment
6 Authorizing immediate removal of Employees from hazardous areas or situations until proper precaution is taken
7 Atmosphere testing and monitoring when there is a possibility of oxygen deficiency or build up of hazardous gasses
8 Inspect trenches daily and as conditions Change to ensure elimination of excavation hazards
Any Trench that is_ or greater in depth must have safe means to get in and out of trench
4 FT
A means to exit should require greater than_ of lateral travel
25 FT
Are an excellent approach to provide a safe method to enter or exit a trench
Ladder
Is a common Protective system and often the most cost-effective way to protect employees from potential trenching and excavation Hazards
Sloping
Sloping sides of a excavation the gradation should be
1/12:1 or 34 Degrees is safe for any soile type
