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INSTRUCTIONS JIB CRANE SERIES GBA - GBP
MAN05MGO5
2.2.5 Noise - Vibrations
•Thejibcranes,beingmanuallyrotated,donotcreatenoiseduringthemovementoftheflexingofthearm.
•Thevibrationsproducedbythejibcrane,duringthemanualrotationofthearm,arepracticallynilandinanycase
not dangerous for the health of the staff who operate them.
•Excessivenoiseorvibrationcanbecausedbyafaultwhichmustbeimmediatelynotifiedandeliminatedsoasnot
to compromise the reliability of the jib crane.
2.2.6 Criteria of use and conditions of use
The necessary indispensable conditions to obtain the full functional responsiveness of the jib crane for the service it
is intended, as well as its optimal and lasting functioning, are in the correct choice of the model of machine. This
choice must be made in relation to the real service performance required as well as the environmental conditions in
which the jib crane will have to operate.
The parameters which must be carefully considered in the choice of jib crane are:
•
4HELIFTINGCAPACITY
this must be determined by the weight of the maximum load to be lifted and must never be
less than this weight.
•
4HEFUNCTIONALDIMENSIONS
the height of the sliding girder of the trolley which determines the hook run of the
hoist and the range must be selected so as to guarantee the functional coverage of the space to be used considering
the surrounding clearance.
•
4HETYPEOFTRANSLATION
manual or electric in relation to the characteristics of the mass to be moved and the type
of arm already selected (channel-cantilever- staybolted girder).
•
4HENATUREOFTHELOAD
the nature of the load determines for its positioning the choice of the speeds of movement
(lifting and translating) suited to the task. In some cases it is indispensable to use two-speed hoists with a slow
positioning speed.
•
4HEAREATOBEUSEDIN
the jib crane features in its conception intrinsic high elasticity which becomes even more
evident when it is used for moving loads close to the maximum load and/or with prevalent localisation in the ends
of the arm.
•
4HEENVIRONMENTTOBEUSEDIN
the jib cranes are intended for service indoors and/or in a covered area, sheltered
from bad weather and away from wind. In the case of use outdoors adequate steps must be taken in relation to the
surface treatment (sanding, varnishing) as well as a system of stopping brake.
•
4HEFREQUENCYOFUSE
if the use is very intense (frequent manoeuvres and/or repeated ones) with loads close to
the maximum lifting capacity, the consequent fatigue of the operator due to the manual movements must be taken
into account.
•Thecorrectevaluationoftheparametersindicatedabove,inthecaseoftheparametersbeingclose
to the upper limits, can lead to the need to use a crane with higher performance features which, once
gonebeyond,canguaranteemorerigidityandfewertranslatingandrotatingstrains.
• Using an electric trolley instead of a push-trolley can reduce the fatigue of the operator
considerably.
KMAN05MG05
