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Excavation

Across
Series of horizontal levels in an excavation
Inclined walking or working surface.
Removed, supported or protections necessary
Natural solid mineral material
Oxygen deficient, may cause death, illness or injury
Access and egress are mandatory at this depth.
Previously disturbed
Class C soils must be sloped at what degree angle.
Structure system that supports the sides of an excavation
Structure that is able to withstand the forces imposed on it by a cave-in
Ladder must extend a minimum of ____ feet above the top level of excavation.
Down
Who designates the Competent Person?
Capable of identifying existing and predictable hazards in surrounding or work conditions.
A ladder must be accessible every __ feet in an excavation.
Horizontal shoring
Tables and charts used to design and construct a protective system
Must be no less than 24 inches from the edge of an excavation.
Trench protection becomes mandatory at how many feet.
Narrow excavation made below the surface of the ground.
Man made cut, cavity, trench in the earth surface formed by earth removal
Separation of a mass of soil or rock materials from the side of an excavation.
Shielding is used to ? employees in the case of a cave in.