Ergonomics - Atlas Copco

1
A seated operator usually has good stability
and is thus capable of performing tasks re-
quiring precision or fine manipulative move-
ment, especially if provided with armrests.
Max 15 0
Static load on the neck and shoulder muscles
should be reduced where possible. The static load
increases with the angle of the head in relation to
the vertical plane.
However, when seated, the operator has less
mobility and is unable to apply the same
degree of force.
When applying ergonomics to the design
of a sitting workstation, working postures
and musculoskeletal load must be taken
into account. This is particularly true for
the low back, the shoulder, and the upper
extremities. Ergonomic workstation design
means careful study of the relationships
between workstation, seat, tools and tasks
to be performed (i.e., product design and
method of manufacture), with the aim of
improving working postures and reducing
musculoskeletal load. The operator’s reach
range and force capacity in a sitting position
are also important design criteria.
The work table
and chair
According to general ergonomic guidelines,
working for long periods with the shoulders
elevated or the arms fully extended should
be avoided wherever possible. Work should
be performed with the trunk upright and
the head in an upright or slightly forward
position, to avoid undesirable twisting. It is
also important to provide sufficient legroom.
Due to the anthropometric differences
between individual operators, i.e., the