Three employees were injured in separate rigging accidents over a two month period. In the first incident, an employee was struck in the head by a metal pulley when the nylon sling it was attached to broke under tension. In the second incident, an employee was struck by a falling 2,000 pound concrete form that broke loose from its rigging during a crane lift. In the third incident, an employee was fatally struck on the head by a drilling pipe that came loose from its rigging during a lift. The document outlines 10 rules for rigging safety including knowing load weights, rigging capacities, center of gravity, sling angles, inspections, and using tag lines and signal persons.
This handbook provides the basics of crane operation and safety requirements as well as guidelines for the initial investigation of crane incidents, including observations to be made at the site as well as questions to be asked during interviews of site personnel.
Lifting slings made from nylon are the most common and versatile styles of slings. Since they can be used in many lifting applications there are several types of damage that can occur.
Our inspection and check list will not only describe the types of damage but will give tips to prevent damage.
This handbook provides the basics of crane operation and safety requirements as well as guidelines for the initial investigation of crane incidents, including observations to be made at the site as well as questions to be asked during interviews of site personnel.
Lifting slings made from nylon are the most common and versatile styles of slings. Since they can be used in many lifting applications there are several types of damage that can occur.
Our inspection and check list will not only describe the types of damage but will give tips to prevent damage.
A Cause-and-Effect Diagram is a tool that helps identify, sort, and display possible causes of a specific problem or quality characteristic. It graphically illustrates the relationship between a given outcome and all the factors that influence the outcome. This type of diagram is sometimes called an "Ishikawa diagram" because it was invented by Kaoru Ishikawa, or a "fishbone diagram" because of the way it looks.
This training session discusses how to avoid slips, trips, and falls in the workplace. This includes avoiding hazards on walking and working surfaces and work platforms, as well as how to avoid accidents on ladders and stairs.
Take this chance to learn more about common types of slings and hardware, sling selection and inspection and how to safely use slings and rigging hardware. The session will also cover the Rigger’s responsibilities including planning and performing the lift in addition to site safety. Mr. Klein will also discuss and provide the requirements set forth by ASME and OSHA for slings and riggers.
Speaker: Tim Klein, Director of Engineered Fabrications, WireCo WorldGroup
Certifique-se de que uma avaliação de risco foi concluída para o trabalho em questão.
Certifique-se de que todos os bloqueios estejam no lugar de acordo com os regulamentos do local.
Fixe os suportes de transporte antes de levantar o transportador para proteger as células de carga.
Use um rigger qualificado para auxiliar no levantamento da correia transportadora sobre a área de pesagem da balança de 12 m.
Remova todos os calços atualmente instalados.
Puxe a linha central da 2ª estrutura intermediária de aproximação do cliente antes da 1ª estrutura intermediária fornecida pela Thermo para a 2ª estrutura intermediária de recuo após as estruturas intermediárias de recuo fornecidas pela Thermo.
Alinhe dimensionalmente as roldanas à linha central e afaste as roldanas a 1m uma da outra, se não marcar corretamente, perfure e fixe as estruturas na longarina.
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In this session, Mr. Groce will identify and explain the differences of kinks, bends and twists as well as what criteria you should use when determining whether wire rope should be removed or repaired. This is a must attend session if you are responsible for inspecting wire rope or supervise someone who does.
Speaker: John Groce, WireCo. WorldGroup
A rope drive is a type of belt drive, used for mechanical power transmission. Rope drives use several circular section ropes, rather than a single flat or vee belt.
Understanding Legionnaires’ Disease A Fact Sheet For Workers And Unionsvtsiri
What is Legionnaires' disease?
Legionnaires' disease is the common name for illnesses caused by Legionnaires' disease bacteria (LDB). The formal name for the diseases is Legionellosis. Legionnaires' disease is an infection of the lungs that is a form of pneumonia. In addition to Legionnaires' disease, the same bacteria can also cause a flu-like disease called Pontiac fever.
2. Hit by Pulley
• Event Date: 07/27/2010
• Inspection: 314807090
• Employee #1 was struck in the head by a metal
pulley when the nylon sling to which it was
connected broke.
• The pulley was being used to drag felled trees.
• When the rigging was put under tension, the
nylon sling broke, releasing the pulley, hitting the
employee in the head.
• 50 M
3. Struck by Form
• Event Date: 04/21/2010
• Inspection: 314374182
• An employee was struck by a falling 20'
column form weighing approximately 2,000
pounds that broke loose from its rigging while
being moved by crane from one location to
another location on the construction site.
• 27 M
4. Pipe Fell
• Event Date: 04/29/2010
• Inspection: 314409277
• On 4/29/10 , an employee was struck on the head by a
drilling pipe which resulted in fatal injuries.
• The employee rigged a 20 foot section of pipe and as it
was being lifted by the operator, the pipe came loose
from the rigging and fell approximately 10 to 15 feet
onto the head of the employee.
• The employee died as a result of his injuries.
• 50 M Fatality
•
5. 10 Rules for Rigging Safety #1
• Know the weight of the load
• Concrete slab
• Steel Beam
• Concrete form
• Tree
6. Bulk Density
• Building material Unit weight
• Aluminum 171 pounds per cubic foot
• Cast Iron 450 pounds per cubic foot
• Cement 94 pounds per cubic foot
• Concrete 150 pounds per cubic foot
• Crushed Stone 2,500 pounds per cubic yard
• Gravel 2,700 pounds per cubic yard
7. 10 Rules for Rigging Safety #2
• Know the center of gravity of the load.
8. Center of Gravity
A load is stable when:
– The hook is directly above the center of gravity of the
load
Estimate the center of gravity
Lift the load just enough to clear the ground
If the hook is not over the center of gravity the hook
will travel to the center of gravity
CG?
9. Center of Gravity
If necessary, set the load down and adjust the
rigging
If the load tips more than 3°, the rigging should be
adjusted
The longer the sling legs, the more stable the load
will be B
The longer set of sling
legs (B) will improve load
A stability
10. How Would You Rig This?
What would you need in the
way of rigging materials?
11. How Would You Rig This?
Would it matter if
the tank were full
or empty?
12. 10 Rules for Rigging Safety #3
• Know the rated capacity
of slings and hardware.
13. 10 Rules for Rigging Safety #4
• Inspect all rigging
before use.
14. Rigging equipment for material handling
• Synthetic webbing (nylon, polyester, and
polypropylene)
• Remove from service immediately if:
– Acid or caustic burns
– Melting or charring of any
part of the sling surface
– Snags, punctures, tears
or cuts
– Broken or worn stitches
– Distortion of fittings
15. 10 Rules for Rigging Safety #5
• Allow for D/d ratio on all wire rope slings.
16. Rigging equipment for material handling
D/d Ratio
D - is diameter around
which sling is bent.
D
d - is diameter of the
sling.
d
17. 10 Rules for Rigging Safety #6
• Protect sling from sharp
surfaces
• Dekalb accident
• Photo is an example
19. 10 Rules for Rigging Safety #7
• Proper calculation of increased tension caused
by sling angles (on all rigging components!).
20. How horizontal angle
affects slings capacity
500 LBS
500 LBS
1000 LBS 1000 LBS
90 60° 45° 30°
1000 LBS 1000 LBS 1000 LBS 1000 LBS
Note: A good operating practice is to keep sling angles from
going below 60 degrees
21. 10 Rules for Rigging Safety #8
• Keep personnel clear
from lift area.
• 1926.953(d) requires
taglines on any load
“where hazards to
employees exist” in
order to keep the loads
under control
22. 10 Rules for Rigging Safety #9
• Calculate reductions
when using choker hitch
24. 10 Rules for Rigging Safety #10
• Know the proper crane signals
• A signal person is required
when:
• The point of operation is not in
full view of the operator
(1926.1419(a)).
• The operator’s view is
obstructed in the direction the
equipment is traveling.
• Either the operator or the
person handling the load
determines that a signal
person is needed because of
site-specific safety concerns.