When an excavation will need to be inspected?

Inspections should be conducted by a competent person each day before the shift starts, during the shift, after rainstorms, or after any other occurrence that may impact the stability of the excavation.

At what point should excavations be inspected?

Inspection. A competent person who fully understands the dangers and necessary precautions should inspect the excavation at the start of each shift. Excavations should also be inspected after any event that may have affected their strength or stability, or after a fall of rock or earth.

Why is excavation inspected after heavy rain?

Wet weather can quickly change what’s safe and what is not. When it rains, the water can make the sides of the trench less stable. OSHA requires that trenches must be inspected daily and as conditions change by a CP (competent person).

When should trenches be inspected by the competent person?

OSHA standards require, before any worker entry, that employers have a competent person inspect trenches daily and as conditions change to ensure elimination of excavation hazards.

What you should do before you begin an excavation?

What you should do before you begin an excavation?

  • Identify the soil type(s) related to the excavation or trench you are going to dig. …
  • Look for the legislative requirements that apply in your jurisdiction and the type of protective measures to be taken.
  • Locate all buried services.
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What needs to be done before you start to excavate?

The first and primary step involved in the excavation is to find out the extent of soil and Clearing of construction site is of unwanted bushes, weeds and plants. Setting out or ground tracing is the process of laying down the excavation lines and centre lines etc. on the ground before the excavation is started.

What are the risk of excavation?

There are a range of health and safety risks associated with excavation work including: falls from one level to another. the fall or dislodgement of earth or rock. vibration and hazardous noise.

How do you inspect excavation?

Items to inspect include:

  1. Surface Conditions. No cracks along the top edge of the excavation. …
  2. Banks and Sides of Slope/Bench. No cracks on the walls of the excavation. …
  3. Shoring/Shielding. …
  4. Access/Egress. …
  5. Existing Utilities. …
  6. Weather (which could affect the integrity of the soil or excavation)

How does rain affect excavation?

In many places, heavy rains can cause the ground to become sodden and the water tables to rise causing problems with excavating for utilities or basements. Heavy rains can cause problems even for completed construction jobs. Flood waters can erode roads to the point where they break and get swept away by the flow.

Can excavation be done in the rain?

Weather wear and tear on excavation equipment and workers

Soak gallons of water into the soil and very quickly that dirt can triple or quadruple in weight. … Bay Area trenching work becomes much more hazardous in rainy weather because the trench walls are more apt to collapse and will need more active shoring techniques.

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What is Class C soil?

Type C Soils are cohesive soils with an unconfined compressive strength of 0.5 tsf (48 kPa) or less. Other Type C soils include granular soils such as gravel, sand and loamy sand, submerged soil, soil from which water is freely seeping, and submerged rock that is not stable.

What is the difference between a trench and an excavation?

What is the difference between an excavation and a trench? OSHA defines an excavation as any man-made cut, cavity, trench, or depression in the Earth’s surface formed by earth removal. A trench is defined as a narrow excavation (in relation to its length) made below the surface of the ground.

When should a trench box be used?

When trenches reach a depth of 5 feet or more, OSHA requires contractors to use a protective system. Protective systems are also required for trenches less than 5 feet deep if the soil might have the propensity to cave in when the trench is dug (such as with sand or mud).

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