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attachementsaccessliftruck_an
 
ATTACHMENTS

Version Franéaise: attachements_accessoires_chariot.php 

Version Anglaise: attachementsaccessliftruck_an.php

Version franéaise: Traduction via Logiciel gratuit Web, en cours de correction, merci. 09/04/2004 

Key Point: Never use a forklift for a job it is not designed to do.

There are many different types of attachments that assist with the handling of all types of goods. They can generally be broken into two groups:

 

  • the attachment that is permanently fixed by some means to the industrial truck; and

     

  • attachments that are only used for a period of time and then removed from the industrial truck.

 

Key Point: Ensure the attachment and load carried are appropriate for the capacity of the industrial truck.

PERMANENTLY FITTED ATTACHMENTS

Attachments that are basically permanently fixed to an industrial truck (such as a paper roll clamp used at newspaper printers) usually has been sized and checked by the company supplying that device, provided the correct capacity industrial truck is being used. When carrying out the assessment, the tare weight and centre of gravity (load centre) of the attachment would be provided and also the mass of the paper roll. A similar approach would be taken in a wool bale storage facility where the industrial trucks only load the one product. This makes the use of an attachment quite safe because the industrial truck's rated capacity is satisfactory for the loads being lifted and transported.

REMOVABLE ATTACHMENTS

Tare Weight: The weight of the object in question, which with the addition of the weight of the load being carried gives the gross weight.

Before any attachment is purchased or used, a person needs to know:

 

  • has it been designed to attach to a specific capacity or type of industrial truck?

     

  • what is the maximum safe load the attachment can lift and transport?

     

  • has the manufacturer provided a tare weight for the attachment and a centre of gravity (load centre) for the attachment itself?

     

  • the safe working load of the attachment must be downgraded if a smaller capacity industrial truck is to be used.

JIB ATTACHMENT

To check that the jib attachment is suitable for the industrial truck, the following needs to be considered:

In this example, the maximum rated capacity of the industrial truck is 5 tonne at 600mm load centre.

Tare weight of jib is 800kg

Centre of gravity (load centre) of the actual jib is 700mm

 

Jib load centre

700mm

= 1.166

Forklift load centre

600mm

 

Mass of jib at 600mm load centre = 1.166 x 800kg = 933kg

Actual lift capacity = 5000 - 933kg - 30kg
(lifting chains = 30kg.)
At the 600mm load centre = 4037kg

Reduced to 80% Due to Dynamic Loads:

Lifting Position(A) (900mm Load Centre)

600mm x 4037kg x .8 = 2153kg S.W.L. kg.
900mm
Maximum rated capacity = 2149kg @ 900mm L.C.

Lifting Position(B) 1200mm Load Centre

600mm x 4037kg x .8 = 1615kg.
1200mm
Maximum rated capacity = 1615kg @1200mm L.C.

Lifting Position(C) 1500mm Load Centre

600mm x 4037kg x .8 = 1292kg
1500mm
Maximum rated capacity = 1292kg @1500mm L.C.

The above provides safe working loads for the three lifting points and incorporates the reduction to 80% of the rated capacity due to the additional dynamic loads.

NOTE:

  1. Because the measuring point for the load centre may be 400mm in front of the axle centre line, the above figures would be erring well on the side of safe lifting.

     

  2. For this exercise, a nominal deduction of 30kg was allowed for the lifting chains, however, no further deduction was taken into account regarding load centres greater than 600mm.

WORK PLATFORM

Where other means of lifting workers are impractical, a work platform can be used to perform tasks of short duration, but this does not include order picking or stores type of activity. When using a work platform the following requirements must be met:

  • for a counter-balanced truck, the rated capacity must be equal to 1800kg or 5 times the combined mass of the tare weight of the platform and its safe working load.

     

  • a flow control device is required to be fitted to the hydraulic mast cylinder to limit the platform descent to a maximum of 0.6 metres/second in case of a burst hose.

     

  • platform maximum swl 250 kg.

     

  • platform to be mounted on forks and have duplicate independent mechanical locks.

     

  • special instructions to be provided to the operator include:

    1. travelling controls in neutral position and park brake engaged;

       

    2. mast set in vertical position;

       

    3. operator to stay at the controls at all times; and

       

    4. check for overhead obstructions before raising the platform.

Further information about the use of work platforms is contained in AS2359 Part 1 - 1995.

Version Franéaise: attachements_accessoires_chariot.php  Version Anglaise: attachementsaccessliftruck_an.php

Version franéaise: Traduction via Logiciel gratuit Web, en cours de correction, merci. 09/04/2004 

attachementsaccessliftruck_an

21.05.2009 11:51:58


 

 

 



 

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