Post on 08-Apr-2018
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An ounce of PREVENTION is better than a pound of CURE
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Presentation Outline
Definitions
Safe Rigging Practice
Job Site Considerations
Rigging Selection
Riggers Responsibilities
Safe Slinging Practice
Safe Practices
Inspection
Replacement
Safety Factors
Wire Rope Construction
Wire Rope Capacity Wire Rope Sling Capacity
Choker adjustment
Sling Damage
Synthetic Sling
Chain Sling
Rigging Protection
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Definitions
Balanced load equally distributed on each
side of the point of support.
Breaking strength the approximate point,
when under maximum load, the load handling
device fails.
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Definitions
Balanced load equally distributed on eachside of the point of support.
Bridle sling A sling composed of multiple legs
gathered in a fitting that goes over the liftinghook.
Competent person selected or assigned bythe employer as being qualified to perform aspecific job.
Factor of safety ratio of breaking strength tothe force to be applied.
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Definitions
Rigging it is the handling or load or loads. It
includes the maneuvering, shifting, lifting and
fastening of loads in accordance to procedures
and safe practices.
Safe working load the maximum allowable
working load established by the manufacturer.
Sheave a wheel with a grooved
circumference over which a rope is bent.
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Safe Rigging Practices
Know How to Do It Right!
Then Do It Right!
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Job Site Considerations
Handling, setting and erection of materials and
equipment is a hazardous occupation.
Each operation presents its own peculiarproblems and no two jobs are alike.
With proper consideration taken, each job can
be performed free of bodily harm to the
employee and without damage to theequipment and/or property.
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Job Site Considerations
The person authorized and qualified to do
rigging must always pay close attention to
details.
One careless moment or act can result in
serious injury or death and tremendous property
damage.
Proper rigging is an art and should never be leftto the inexperienced. If you dont know how todo it properly, then dont attempt it.
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Job Site Considerations
Persons performing rigging tasks usually already
have two strikes against them when they start!
Unfavorable Job conditions. Job Schedule to meet.
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Rigging Selection
Very rarely does the average worker on a
construction site get the opportunity to actually
pick the type of rigging equipment required.
They are normally purchased by a supervisor,
the Company Purchasing Department or it is
sent out from another project. This in itself can
create serious problems.
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Rigging Selection
The rigging capacity and the material to be
lifted must match. Using too small capacity
rigging or components is just asking for an
accident to happen.
1. Who is responsible (competent/qualified) for the
rigging?
a. JSA/JHA shall be communicated
b. Specific Toolbox conducted
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Rigging Selection
2. Is the Equipment in Acceptable Condition?
a. Appropriate Type?
b. Proper Identification?
c. Properly Inspected?
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Rigging Selection
3. Are the Working Load Limits Adequate?
a. What is the weight of the load?
b. Where is the center of gravity?
c. What is the sling angle?
d. Will there be side loading?
e. Capacity of the gear?
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Rigging Selection
4. Will the Load be Under Control?
a. Tag Line available?
b. Is there any possibility of fouling?
c. Clear of Personnel?
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Rigging Selection
5. Are there any Unusual Loading or Environmental
Conditions?
a. Wind?b. Temperature?
c. Surfaces? (Ice, Suction, Water)
d. Unstable Object(s)?
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The Users Responsibilities
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The Users Responsibilities
Rigger
CraneOperator
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The Users Responsibilities
Utilize Appropriate Rigging Gear Suitable For
Overhead Lifting.
Utilize The Rigging Gear Within IndustryStandards And The Manufacturers
Recommendations.
Conduct Regular Inspection And Maintenance
Of The Rigging Gear.
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BASIC SLING SAFETY
PRACTICES
ANSI B30.9
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Definitions
Hitch Basket - loading with the sling passed
under the load and both ends on the hook or a
single master link.
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Definitions
Hitch Choker loading with the sling passed
through one eye and suspended by the other.
Use a bull dog clip to avoid slippage
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Definitions
Hitch Vertical loading with the load
suspended vertically on a single part or leg of
the sling.
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Definitions
Master link a steel link or ring used to support alllegs of a chain or wire rope sling.
Mousing lashing between the neck and the tipof a hook to prevent the load coming off. Ensurethe hook is fitted with latch.
Rated capacity the maximum allowableworking load.
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Definitions
Rigging the connecting of a load to a source
of power so that it can be lifted and moved
safely and predictably.
Safe working load the maximum allowableworking load established by the manufacturer.
Sheave a wheel with a grooved
circumference over which a rope is bent.
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Definitions
Wire rope consists of many individual wires laid
into a number of strands which are in turn, laid
around a center core.
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Safe Practices
1.Slings that are damaged or defective shall not
be used.
2.Slings shall not be shortened with knots or boltsor other makeshift devices.
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Safe Practices
7.Slings shall be padded or protected from the
sharp edges of their loads.
8.Suspended loads shall be kept free ofobstructions.
9.All employees shall be kept clear of loads about
to be lifted and of suspended loads.
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Inspection
Each day before being used, the sling and all
fastenings and attachments shall be inspected
for damage and defects by a competent
person.
Additional inspections shall be performed
during sling use as often as necessary to assure
the safety of the operation.
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Wire Rope Construction
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Wire Rope Construction
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Wire Rope Sling Capacities
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Type of Wire Rope Sling
Damage
Birdcage damage
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Synthetic Slings
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Slide 44
A12 If not mistaken, the width of the slings determines the SWL. eg. a 3in wide synthetic sling capacity is 3 tons. Double check
on this.Admin, 3/21/2011
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Rigging Protection From
Cutting or Slipping
Softeners, padding or use of blocking..
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Protecting Rigging From
Damage or Environment Rigging components are expensive to buy and to
replace! Use them properly and store them properly!
Keep wire rope slings lubricated and all rigging stored
out of the weather.
Treat the rigging as though your life depended on it!Because it does if it fails!
Dont use makeshift rigging or attempt to repair any
rigging components.
Knots tied in rigging reduces the strength by 50% ormore!
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How Would You Rig This?
Would it matter if the
tank were full or
empty?
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Removing Jewelry and
Wearing Gloves!
Cause?
Not wearing
gloves and not
taking off the ring.
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Any Questions?
If the student hasnt learned,the instructor hasnt taught!
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THANK YO
U