9953330565 Low Rate Call Girls In Rohini Delhi NCR
EXCAVATION SLIDE.pptx
1. Excavation Hazard & Precautions
WEL COME خوش
آمدید स्वागतम
Name of facilitator:
Syed Neyaz Ahmad
Location:
Fujairah U.A.E.
Date:
17th October 2022
3. Agenda
►How to identify practices that protect you at an excavation site
►How to find hazards at work that could cause an excavation or
trenching injury
►How to identify behaviors that could
cause injuries at an excavation site
►QUIZ
4. The Worksite Analysis
1. Identify your work space.
2. Look for hazards
3. Use a checklist to identify hazards.
4. Discuss problems and corrections with supervisor.
5. Before beginning excavation:
Evaluate soil conditions
Construct protective systems
Test for low oxygen, hazardous
fumes and toxic gases
Provide safe in and out access
Contact utilities
Determine the safety equipment needed
6. HAZARDS
Cave-ins are the greatest risk:
Other hazards include:
Asphyxiation due to lack of oxygen
Inhalation of toxic materials
Fire
Moving machinery near the edge of the excavation
can cause a collapse
Accidental severing of underground utility lines
7. Hazards in easy words
Water accumulation
Oxygen deficiency
Toxic fumes
Access/Egress
Falls
Mobile equipment
When water is present in an excavation it is
extremely hazardous to enter
8. The greatest risk at an excavation
How to protect employees from cave ins
Factors that pose a hazard to employees working in
excavations
The role of a competent person at an excavation site
9. PRECAUTIONS
Protect Employees Exposed to Potential Cave-ins
Slope or bench the sides of the excavation,
Support the sides of the excavation, or Place a shield between
the side of the excavation and the work area
Fence or barricade
Means of Egress : A stairway, ladder
10. PRECAUTIONS
Every excavation pit must be fenced / barricaded up to height of 3 feet
Ladder should be extended at least 3 feet above the surface
Follow PTW system
Services drawings to be used to determine cable/pipeline route.
Trial hand digging to be undertaken in order to verify cable/pipeline route.
Banks-men to be provided whenever vehicles are working adjacent to excavations.
Blinking light and hard barricading shall be provided to warn vehicle and workers.
Type of soils and slope required:
Solid rock 90 degree > benching
Compacted angular gravels 63 degree
Average soils 45 degree > sloping
Compacted sharp angle 33 degree
Loose soil 26 degree
11.
12. Factors Involved in Designing a Protective System
Soil classification
Depth of cut
Water content of soil
Changes due to weather and climate
Other operations in the vicinity
Shoring
13. Requirements
Soil heaps 1.5 meter away from excavation edge
Excavation 4’ deep access & egress required every 25’
Gas test required 1.22 meter (4’) excavation
EMERGENCY CONTACT NUMBER’s
Civil Defense 997
Ambulance 998
Police 999
14. Requirements
HSE Requirements:
1. All work inside needs permit.
2. Work shall be started after authorization of permit.
4. Tool box talk shall be conducted.
5. Gas test shall be done.
6. Continues Gas Monitoring
The following PPE’s are mandatory:
Full sleeve coverall
Helmet
Safety goggles
Safety shoes
Hearing protection
Mask
15. QUIZ
TRUE or FALSE?
Because trenches are outdoors, it is not necessary
to be concerned about hazardous air.
The outdoor air will neutralize
any bad air in the trench.
16. ANSWER
FALSE
When dusts, fumes, mists, vapors or
gases are produced, they must be
handled to prevent a hazardous situation
in the trench .
OSHA 29 CFR 1926.57
17. QUIZ
TRUE OR FALSE?
If you are working in a trench where there are
only a few inches of water, you are permitted to
work in the trench.
18. ANSWER
FALSE
Employees shall not work in a trench where
water is standing or accumulating, unless there
is a system to remove the water, or the
employee uses a safety harness and lifeline.
OSHA 29 CFR 1926.651
19. QUIZ
TRUE OR FALSE?
If an excavation needs a ramp for entering and
exiting, anyone on the construction crew can
be assigned to find a ramp and put it in place.
20. ANSWER
FALSE
Structural ramps at excavations much be
designed by a competent person and
constructed in accordance with the design.
OSHA 29 CFR 1926.651
21. QUIZ
TRUE OR FALSE?
When a construction crew digs for an excavation,
it is okay to pile the dirt that is dug up (the spoils)
right at the edge of the excavation.
22. ANSWER
FALSE
The spoils of an excavation must be kept at
least two feet from the edge of the excavation.
OSHA 29 CFR 1926.651
23. QUIZ
TRUE OR FALSE?
A competent person has the authority to evacuate an excavation
site if that person believes the site is exposing employees to
unsafe conditions such as a possible cave-in or hazardous air.
24. ANSWER
TRUE
The competent person has authority to evacuate an
excavation site if it is exposing employees to unsafe
conditions such as a possible cave-in or hazardous
air.
OSHA 29 CFR 1926.651