Cave-ins pose the greatest risk in excavations. Other hazards include asphyxiation, toxic fumes, fire, and moving machinery. Protective systems like sloping, shielding, and shoring must be used to protect employees. A competent person must inspect excavations and protective systems daily and after any changes in conditions to ensure employee safety.
Construction is the industry mostly affected during monsoon season. Not only there are work delays but working in rain also cause some additional Health & Safety hazards. Some extra precautions must be taken to minimize the health risk during rainy season and workers should be trained to work during low visibility and slippery conditions.
Construction is the industry mostly affected during monsoon season. Not only there are work delays but working in rain also cause some additional Health & Safety hazards. Some extra precautions must be taken to minimize the health risk during rainy season and workers should be trained to work during low visibility and slippery conditions.
Health and Safety Toolbox Talks are the quickest and most effective way to educate your construction workers in short bursts.
This toolbox talk gives you the information you need your staff to know to be able to work safely in and around excavations.
A must for all groundworkers, utility installers and any trade working on site during excavation work.
This presentation covers dropped objects, how we define dropped objects and understand their causes and consequences.
Topics covered include:
> Static Dropped Objects
> Dynamic Dropped Objects
> Working at height
> Hazard identification
Fall hazard means a circumstance that exposes a worker in a workplace to a risk of a fall that is reasonably likely to cause injury to the worker or other person.
Assessing risks from working at height.
Common Fall Hazards at construction site.
Common Scaffold Hazards.
PERSONAL FALL PROTECTION.
Travel-Restraint Systems.
Fall-Arrest Systems.
Lifelines.
Scaffolding, also called scaffold or staging, is a temporary structure used to support a work crew and materials to aid in the construction, maintenance and repair of buildings, bridges and all other man made structures.
OSHA performance standard for trenching and excavation deals with many topics including soil classifications, underground hazards, atmospheric hazards, protection systems, competent person qualifications, etc. Our training covers all types of construction work. If you want to attend our classes, contact us by email at windsgroup@aol.com or call (732) 221-5687. More information can be obtained on our website. OSHA 10-Hr and 30-Hr.Construction Health and Safety courses are forming now.
Health and Safety Toolbox Talks are the quickest and most effective way to educate your construction workers in short bursts.
This toolbox talk gives you the information you need your staff to know to be able to work safely in and around excavations.
A must for all groundworkers, utility installers and any trade working on site during excavation work.
This presentation covers dropped objects, how we define dropped objects and understand their causes and consequences.
Topics covered include:
> Static Dropped Objects
> Dynamic Dropped Objects
> Working at height
> Hazard identification
Fall hazard means a circumstance that exposes a worker in a workplace to a risk of a fall that is reasonably likely to cause injury to the worker or other person.
Assessing risks from working at height.
Common Fall Hazards at construction site.
Common Scaffold Hazards.
PERSONAL FALL PROTECTION.
Travel-Restraint Systems.
Fall-Arrest Systems.
Lifelines.
Scaffolding, also called scaffold or staging, is a temporary structure used to support a work crew and materials to aid in the construction, maintenance and repair of buildings, bridges and all other man made structures.
OSHA performance standard for trenching and excavation deals with many topics including soil classifications, underground hazards, atmospheric hazards, protection systems, competent person qualifications, etc. Our training covers all types of construction work. If you want to attend our classes, contact us by email at windsgroup@aol.com or call (732) 221-5687. More information can be obtained on our website. OSHA 10-Hr and 30-Hr.Construction Health and Safety courses are forming now.
Every year people are killed or seriously injured by collapses and falling materials while working in excavations. They are at risk from:
Excavations collapsing and burying or injuring people working in them;
material falling from the sides into any excavation; and
people or plant falling into excavations.
IN 2015, OSHA proposed changes to the reporting requirements for all occupationally related injuries and illness. This presentation provides the updates to the regulatory requirements. If you have questions, feel free to contact us.
This paper was presented at the Asian Development Bank - SEA Energy Initiative Seminar at Putrajaya Pullman Hotel on 22nd October 2013. It describes the methodology of the development and the performance of the system upon completion. This is the biggest concrete chilled water tank in Malaysia and also in Asia as well as the first satellite charging plant in Malaysia. The plant has been in operation since February 2013 providing chilled water to Putrajaya Core Island buildings.
Serious incident investigation at work and what's happeningTerry Penney
Since the industrial revolution the world has seen an ever increasing proliferation of production facilities and with it a steady increase in workplace accidents and fatalities. The field of safety management was borne out of the need to curtail the extremely high human and commercial costs of these incidents. When a fatality at work takes place people need to understand the importance of the event plus what officers and OHS need to learn from the site.
2. 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
3. Excavating is one of the most
hazardous construction
operations
• Most accidents occur in
trenches 5-15 feet deep
• There is usually no warning
before a cave-in
4. Excavation – a man-made cut, cavity, trench, or depression
formed by earth removal.
• Trench – a narrow excavation. The depth is greater than the
width, but not wider than 15 feet.
• Shield - a structure able to withstand a cave-in and protect
employees.
• Shoring - a structure that supports the sides of an excavation
and protects against cave-ins.
• Sloping - a technique that employs a specific angle of incline
on the sides of the excavation. The angle varies based on
assessment of impacting site factors.
5. 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
6. Employees should be protected from
cave-ins by using an adequately
designed protective system
• Protective systems must be able to
resist
all expected loads to the system
7. A well-designed protective system
Correct design of sloping and benching systems
Correct design of support systems, shield
systems, and other
protective systems
Plus
• Appropriate handling of materials and equipment
Plus
• Attention to correct installation and removal
Equals
• Protection of employees at excavations
8. Design of Protective Systems
• The employer shall select and construct :
slopes and configurations of sloping and
benching systems
support systems, shield systems, and other
protective
systems
• Shield - can be permanent or portable; also known
as trench box or trench shield
• Shoring - such as metal hydraulic, mechanical or
timber shoring system that supports the sides
• Sloping - form sides of an excavation that are
inclined away from the excavation
9. 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
10. 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
11. Shoring
• General
Provides a framework to work in
Uses wales, cross braces and uprights
Supports excavation walls
• OSHA tables provide shoring data
Must know soil type
Must know depth and width of
excavation
Must be familiar with the OSHA Tables
12. Using hydraulic jacks, the
operator can easily drop
the system into the hole
• Once in place, hydraulic
pressure is increased to
keep the forms in place
• Trench pins are installed
in case of hydraulic failure
13. Equipment used for
protective systems must
not have damage or
defects that impair
function.
• If equipment is damaged,
the competent person
must examine it to see if it
is suitable for continued
use.
• If not suitable, remove it
from service until a
professional engineer
approves it for use.
14. Protection from Vehicles
• Install barricades
• Hand/mechanical signals
• Stop logs
• Grade soil away from
excavation
• Fence or barricade
trenches left overnight
15. The weight and
vibrations of the
crane make this a
very hazardous
condition.
• They should not be
working under this
crane.
16. Spoils
• Don’t place spoils within 2
feet from edge of
excavation
• Measure from nearest part
of the spoil to the
excavation edge
• Place spoils so rainwater
runs away from the
excavation
• Place spoil well away from
the excavation
17. Other Excavation Hazards
• Water accumulation
• Oxygen deficiency
• Toxic fumes
• Access/Egress
• Falls
• Mobile equipment
18. When water is present
in an excavation it is
extremely hazardous
to enter
19. Test excavations more than 4
feet before an employee
enters the excavation for:
Oxygen deficiency
High combustible gas
concentration
High levels of other
hazardous substances
20. Means of Egress
A stairway, ladder,
or ramp must be
present in
excavations that are
4 or more feet deep,
and within 25 feet
of the employees.
21. Protection from Falls, Falling Loads,
and Mobile Equipment
• Install barricades
• Use hand / mechanical signals
• Grade soil away from excavation
• Fence or barricade trenches left overnight
• Use a flagger when signs, signals and
barricades are
not enough protection
22. Must have had specific training
in and be knowledgeable
about:
Soils classification
The use of protective systems
The requirements of the standard
• Must be capable of identifying
hazards, and authorized to
immediately eliminate hazards
23. A competent person must
make daily inspections of
excavations, areas around
them and protective
systems:
Before work starts and as
needed,
After rainstorms, high winds
or other occurrence which
may increase hazards, and
When you can reasonably
anticipate an employee will be
exposed to hazards
24. If the competent person
finds evidence of a possible
cave-in, indications of failure
of protective systems,
hazardous atmospheres, or
other hazardous conditions:
Exposed employees must be
removed from the hazardous
area
Employees may not return until
the necessary precautions have
been taken
25. 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