[Ergonomic assessment of technical improvements in the work of manual labourers of a porphyry quarry].
BACKGROUND
Previous investigations have shown an excess of musculoskeletal disorders in quarry workers referable to awkward postures and lifting of heavy weights. Recently several sorts of workbenches equipped with conveyor belts were introduced in order to improve job postures and, therefore, safety.


METHODS
Using the OWAS method we investigated the postures of quarry workers using two technologically different workbenches which were compared with the traditional working method (completely manual).


RESULTS
Use of workbenches allows quarry workers to work standing with the back on a vertical axis and legs infirm and stable position.


CONCLUSIONS
According to the OWAS method most postures adopted in traditional working methods involve a high risk, whereas with the use of workbenches most of these high risk postures are reclassified and no longer require urgent ergonomic redesign. Technical innovations (such as lifting platforms and air suction pad winches) allow workplaces to be planned depending on the size and weight of the stone materials obtained from the quarry face.
Grecchi
Adriana
A
APSS Trento, Trento.
Cristofolini
A
A
Correzzola
C
C
Piccioni
A
A
Buffa
Chiara
C
Pol
G
G
D003252:Construction Materials; D006804:Ergonomics / Q000592:standards*; D006801:Humans; D007558:Italy; D016272:Occupational Health; D011187:Posture