INSTALLATION, USE AND MAINTENANCE
GBA-GBP-CBE-MBE SERIES
10
2.2.6 Use criteria and operating conditions
One of the necessary and indispensible conditions to obtain the complete operating compliance of the jib
crane, for the use it is intended for, as well as excellent and long-lasting operation of the same, consists of
the correct selection of the machine model. This selection must be made based on the real service
performance required as well as the ambient conditions where the crane will operate.
The parameters which must be carefully considered in the choice of jib crane are:
•
The capacity
: the maximum load weight to lift must be calculated and must not ever be less than
the same.
•
The functional dimensions
: the height of the trolley beam which determines the hook run of the
hoist, and its jump (jib) must be selected so as to guarantee the functional coverage of the area to
be served in consideration of the surrounding encumbrances.
•
Type of travel
: manual or electric based on the characteristics of the mass to move.
•
Nature of the load
: delicate or not determines by its positioning the choice of the most suitable
handling (lifting and travel) speeds. In some cases it is indispensable to use hoists with two speeds
with a slow positioning speed
•
Area of use
: the jib crane is characterised, by its conception, by intrinsic high elasticity which
becomes even more evident when it is used for handling with loads close to the maximum lifting
capacity and/or with prevalent localisation at the ends of the arm.
•
Ambient of use
: the jib cranes are intended to be used inside and/or in a covered area, sheltered
from bad weather and wind. Measures must be taken for outdoor use for a suitable surface
treatment (sandblasting - painting) as well as a self-braking system.
•
Frequency of use
: if use is very high (frequent and/or repeated manoeuvres) with loads close to
the maximum load the consequent fatigue of the operator due to manual handling must be taken
into consideration.
•
The correct evaluation of the parameters indicated above, may lead, if they are
close the their limit values, to the need to use a crane with higher performance
characteristics that, once declassed, may ensure greater rigidity and duration.
•
The use of an electric trolley instead of a push trolley can also reduce operator
fatigue.
