
MSD's
can develop when workers must use uncomfortable and/or awkward postures
for long periods while working, stooping, twisting, reaching are
examples of that can lead musculoskeletal injury.

The
conveyed product can sometimes differ at stages of a so varying the
relative the size of the object these various stages help operators to a
comfortable posture within each stage, the conveyor height is considered
to be fixed so objects can be transported without disturbance.