Verlinde TVI Series, Instruction Manual

Page: 9 / 30


9/30
03/2016
4.5 - Classification FEM
There are eight groups of mechanisms:
FEM 1 Dm 1 Cm 1 Bm 1 Am 2m 3m 4m 5m
ISO M 1 M 2 M 3 M 4 M 5 M 6 M 7 M 8
To determine the group of a given lifting device, winch or hoist, three essential parameters must be
considered:
4.5.1. - Maximum load to be lifted
Including the weight of the rope and any lifting accessories used (hook, etc.) unless these have a total
weight equal to or less than 5% of the load to be lifted.
4.5.2. - Strain condition
Specifies the proportions in which the lifting machine is used with maximum load or reduced load. Four
characterized strain conditions are identified in this way:
Light
Lifting machines exceptionally subjected to the maximum
strain and commonly to very light strains.
k ≤ 0.5
Medium
Lifting machines often subjected to the maximum strain
and commonly to light strains.
0.5 < k
≤ 0.63
Heavy
Lifting machines frequently subjected to the maximum
strain and commonly to medium strains.
0.63 < k ≤ 0.8
Very
heavy
Lifting machines regularly subjected to the strains near to
the maximum strain.
0.8 < k ≤ 1
4.5.3.
– FEM classification
Strain
condition
Average operating time per day, in hours
30’
1 h 2 h 4 h 8 h 16 h
More than
16 h
Light 1 Dm 1 Cm 1 Bm 1 Am 2m 3m 4m
Medium 1 Cm 1 Bm 1 Am 2m 3m 4m 5m
Heavy 1 Bm 1 Am 2m 3m 4m 5m
Very heavy 1 Am 2m 3m 4m 5m
5
– Handling - Storage
When handling the winch, use slings that are compatible with the slinging points provided for this purpose on
the winch.
Warning: the angle formed between the hook and the two slinging points must be at most 45º.
Lift and set down the winch with care, without letting it fall, bearing in mind the offset centre of gravity.
For further information on the weight of the winch, consult the Technical Specifications chapter.
These winches must be protected from the elements, in a dry and clean location, at temperatures comprised
between -10ºC and +50ºC.