Lifting Gear Cranes

Post on 01-Feb-2016

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Transcript of Lifting Gear Cranes

LIFTING GEAR

Cranes- pedestal- floating/heavy lift- HIAB/knuckle type- boat davits

Derricks- single- union purchase

Hoists- electric- air- chain

Types of Lifting Gear

Cranes Basic Components

Pedestal Crane

Reefer

General Cargo

Bulk Carriers

Pedestal crane

STANDARD FEATURES:

1. Level luffing jib

Limit Switches:

Limit switches are designed to shut the crane down whenit exceeds safe working parameters.

• Max. hook height• Max. jib elevation• Min. jib elevation• Ship out of trim• Dancing roller arrangement

Limit By-Pass

SWL Markings

Pedestal Crane

Pedestal with grab

Floating & Heavy Lift

HIAB & knuckle crane

Boat Davits

SWL markings for Cranes

SWL details must be marked:

on an external part of the the cranes structure, or

on derrick crane, or

on a plate near the heel of the derrick

and

in the driver’s cabin within easy view of driver

12T 30m / 20T 10m

SWL Outreach

Derrick/crane boom

Derricks

Union Purchase

Union Purchase

HOISTS

Chain

Electric

Air

Chain hoist:• High tensile lifting chain• Auto brake when power off• Max. and Min. hook height• SWL marked on hook and unit

Electric wire rope hoist: • Similar to chain hoist• Grooved drum with sliding rope guide

Chain Block:• Manual operated• SWL marked on unit• High tensile lifting chain

Inspect all equipment for defects.

Determine weight of load and position of the c of g

Decide method of slinging and lifting the load.

Ensure load is free to be lifted

Clear communications/ signals

Apply the load gradually to avoid exceeding the S.W.L.

Check the load's balance .

When lowering, stop a short distance above the landing site

NEVER leave controls unattended with a load suspended

Check lifting equipment before returning to stowage.

Procedure for Moving Loads

Stay clear of loaded boom

Heavy weights should never be allowed to drop

Avoid swinging loads. Shift loads under hook.

Do not exceed SWL

All motion with heavy lifts should be slow

Procedure for Moving Loads

SIGNALS: UNION PURCHASE

SIGNALS: CRANE