Excavation
What Sloping angle is suitable for any type of soil.
1 1/2 to 1 slope.
What are the 4 types of Soil
Stable Rock, Type A, B and C
Who is responsible for protecting workers from cave ins
The employer
What must you do before you dig.
Call for Utility Locates. 811
What is the sloping angle for type B soil.
1 to 1 slope
How high must the top of the trench box be above any material that could cave in
18"
What is the minimum distance that excavated materials, tools, and other supplies be kept back from the excavation’s edge?
At least 2'
At what depth is Fall Protection Required
6'
What is the greatest hazard facing a worker while working in a trench:
Cave ins
How high can the trench box be above the bottom of the trench
2'
At what depth must a ladder, ramp, steps, or runway be present for quick worker exit:
4 feet or deeper
Unless made in entirely stable rock, at what depth is a protective system required for a trench:
Any depth if the competent person notices a hazardous condition, or 5 feet deep and greater
Who determines the soil type
Competent person
Who is responsible for conducting Daily Excavation Inspections
Competent Person
Can you Bench Type C Soil
No
Do Excavation Inspections need to be Documented.
Yes, excavation inspections must be conducted daily before each shift, and any time water accumulates in the excavation.
How much does 1 cubic yard of soil weight
3000 LBS
What are the 4 Types of Protective Systems
Shoring, Sloping, Benching and Shielding.
What is the 1,2,3,4,5 Rule
1 Competent person. Materials 2' away. Ladder 3' above. Ladders at 4'. Protection at 5'.