training rigging engineers

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Development of Course Material

for Training Rigging Engineers

Dannelly Brown

Naval ArchitectJune 14, 2012


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Project Team

NASSCO Initial Design and Naval Architecture Lucas Gray

Dannelly Brown

NASSCO Rigging Engineering

Romeo Moe

Saul Spykerman

NSRP Workforce Development Panel

Mark McCoy

NASSCO Project Liaison

Aris Petrov


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What training is already available?

None.

An ABET-accredited rigging engineer degree or PE license does

not exist.

The only path to knowledge is experience.


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Who is a rigging engineer?

The term “ rigging engineer” is not defined.

Shipyard rigging engineers are often:

Naval architects

Mechanical engineers

Structural engineers

Civil engineers

Weight control

Students should be engineers from a shipyard background,but not necessarily familiar with rigging.


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What is rigging engineering?

Movement by Crane Erections

Material handling

On the ground

Load support during outfitting

Ground transportation

Equipment installation

Testing

UNREP or windlass testing

Compliance Maintenance and inspection of equipment

Course covers this


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Where would a rookie start?

There is nothing thatregulates or teaches engineers:

Margins on weight estimates

Load deflection

Reserve capacity of cranes

Clearances

There is no proper training for: How to conduct a weight estimate

Where to install padeyes

How to evaluate load stability

How would a rookie know to check these,

much less know the answers?


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Training Course Format

This course doesn’t prescribe procedure, but

Reviews existing standards

Points to resources

Discusses areas of risk

Provides guidance for good engineering practice

This course is modifiable to incorporate yard-specificinformation such as:

Crane capacities and reach, spreader bar information

Weight estimation development Stages of Construction

Rules of thumb

Margins


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Training Course Format

The course comprises 8 topics:

Powerpoint Presentation

Student Guide

Instructor Notes

Instructor guide

10-question test


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Dannelly, Slow

Down!


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Rigging

Operations

High Risk LiftUnknown CG

Flexible structure

Impact load

Inclement weather

Pick points below

the CG

More than 1 crane

Water is involved

Cluttered load pathExceeds >75% of

crane capacity

Statically indeterminate


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Lift ing Tools and Vocabulary – Part I

Introduces vocabulary

Discusses cranelimitations andcapabili ties such as

One-crane is saferthan 2 due to reduced

likelihood of becomingoff lead.

Two-cranes allowsingle-axisleveling or angling.One-crane lifts mayresult in point loading.

Talks to the purpose ofspreader bars

Presents various types


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Lift ing Tools and Vocabulary – Part II

Slings

Synthetic

Wire Rope

Chain

Shackles

Padeyes

Common manufacturers and available

information Applicable ASME or OSHA regulation

Maintenance information

Common causes of failure


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Yard Information - yard tour or a powerpoint or both

Cranes (capacit ies, load charts, tracks)

Spreader bars (capacities, typical arrangements)

Storage locations for equipment

Maintenance policies

Standard units, reference points, work package information

Safety margins and high risk areas Documentation policies

Safety information (PPE, walking underneath loads)

Points of contact

It is important to tailor this topic to the audience.For example, a new graduate will require different information

than an ex-foreman who has been to night school.


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Legislation, Standards, and References

OSHA / CFR

ASME B30.20

ASME BTH-1

AWS D14.1

Due to the shortage of applicable standards, the riggingengineer should be familiar with alternative resources and

best practices.


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ASME BTH Standard

Walks through the standard for familiarity

Discusses modes of failure

References papers for design guidance

Points to areas of confusion


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Safety

Load Stabili ty Load and center of gravity

estimation

Communication

Management Pressure

Communication Exceeding the limit of the

facility

Plus Murphy’s Law


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Load Instabil ity

An instable load will overturn if there is any induced angle. An induced angle may be caused by:

Landing on an inclined surface

A poorly estimated center of gravity

Wind

Uneven crane pull

A stable arrangementexamines

Geometry

Moments caused by an

induced angle


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Weight and Center Estimation

Steel

Outfit

Rigging hardware (slings, spreader bars)

Landing equipment (fitt ing aids, pipe shores)

Production support (scaffolding, temporary lighting)

Free ride equipment Immeasurable weights (paint, welding)

Liquids (machinery)

Weight margin

Anything else (rainwater, garbage)


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Padeye Location


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Internal Structure

Reliance on available backup structure

Minimum temporary structure

Minimal load deflection

Minimal welding distortion


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Acceptable Geometry

No interference with outf itting,

especially during 180 turn

Acceptable separation of the

booms

Appropriate spreader bar

selection


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Planning for Later Lifts

Acceptable side load on padeye especially during 180 turn

Preference to downhand welding

Ease of padeye and temporary structure removal

Maximize the padeyes left on the ship

Reuse of padeyes on later lif ts


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Rigging Practice


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How to Obtain the Course

We’ve got copies here if

anyone wants one.

Contact [email protected]

to receive a CD in the

mail.

training rigging engineers

Documents