Cave-ins pose the greatest risk in excavations. Other hazards include asphyxiation, toxic fumes, fire, and mobile equipment. Most excavation accidents occur in trenches between 5-15 feet deep, where there is often no warning before a cave-in. Excavations must have adequate protective systems like sloping, shielding, or shoring to prevent cave-ins, and a competent person must inspect the site daily for hazards.
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.
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.
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We used HTML/PHP as front end and MYSQL as back end for developing our project. HTML is primarily a visual design environment. We can create a android application by designing the form and that make up the user interface. Adding android application code to the form and the objects such as buttons and text boxes on them and adding any required support code in additional modular.
MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software. It is a stable ,reliable and the powerful solution with the advanced features and advantages which are as follows: Data Security.MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software.
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Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
6th International Conference on Machine Learning & Applications (CMLA 2024)ClaraZara1
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The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
NUMERICAL SIMULATIONS OF HEAT AND MASS TRANSFER IN CONDENSING HEAT EXCHANGERS...ssuser7dcef0
Power plants release a large amount of water vapor into the
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Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
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2. OSHA Office of Training and Education 2
Excavation 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
3. OSHA Office of Training and Education 3
Injury and Death
• 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. OSHA Office of Training and Education 4
Definitions
• 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. OSHA Office of Training and Education 5
Focus of Training
• 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. OSHA Office of Training and Education 6
Protection of Employees
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. OSHA Office of Training and Education 7
Requirements for
Protective Systems
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. OSHA Office of Training and Education 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. OSHA Office of Training and Education 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. OSHA Office of Training and Education 10
Cave-in Hazard
This excavation
has inadequate
support posts and
egress access
Inadequate protective system
11. OSHA Office of Training and Education 11
Inadequate Protective System
This worker is in a
trench with no
protective system,
that is not sloped or
benched and has no
means of egress
12. OSHA Office of Training and Education 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
13. OSHA Office of Training and Education 13
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
14. OSHA Office of Training and Education 14
Trench Shield
A trench shield
was built around
this work area
15. OSHA Office of Training and Education 15
Hydraulic Trench Support
• 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
16. OSHA Office of Training and Education 16
Materials and Equipment
• 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.
17. OSHA Office of Training and Education 17
Protection from Vehicles
• Install barricades
• Hand/mechanical signals
• Stop logs
• Grade soil away from
excavation
• Fence or barricade
trenches left overnight
18. OSHA Office of Training and Education 18
Hazardous Conditions
The weight and
vibrations of the
crane make this a
very hazardous
condition.
They should not
be working under
this crane.
19. OSHA Office of Training and Education 19
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
20. OSHA Office of Training and Education 20
Other Excavation Hazards
Water accumulation
Oxygen deficiency
Toxic fumes
Access/Egress
Falls
Mobile equipment
21. OSHA Office of Training and Education 21
Water is Hazardous
When water is
present in an
excavation it is
extremely
hazardous to
enter
Note that these workers are not
wearing hardhats to protect them
from materials falling into the trench
22. OSHA Office of Training and Education 22
Water = Cave-in Hazard
These workers must be protected from cave-in. Note the water
in the bottom of the trench. This is a very hazardous condition!
23. OSHA Office of Training and Education 23
Hazardous Atmosphere
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
24. OSHA Office of Training and Education 24
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
This ladder does not meet the
requirements of the standard
The ladder should extend 3 feet
above the excavation
25. OSHA Office of Training and Education 25
Access and Egress
These two ladders
which are lashed
together are not an
adequate means of
egress
The ladder should
extend 3 feet above
the top of the
excavation
26. OSHA Office of Training and Education 26
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
27. OSHA Office of Training and Education 27
Competent Person
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
28. OSHA Office of Training and Education 28
Inspections of Excavations
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.
29. OSHA Office of Training and Education 29
Inspections of Excavations
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
30. OSHA Office of Training and Education 30
Site Evaluation Planning
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
Fissure
31. OSHA Office of Training and Education 31
Summary
• The greatest risk in an excavation is a
cave-in.
• Employees can be protected through
sloping, shielding, and shoring the
excavation.
• A competent person is responsible to
inspect the excavation.
• Other excavation hazards include water
accumulation, oxygen deficiency, toxic
fumes, falls, and mobile equipment.