**5. Conclusion**

In the light of our results and the literature data, several measures should be implemented in this steel company, to prevent both short-term and long-term effects linked to thermal stress in this environment.

Globally, the preventive approach in this sector must combine technical, organizational and medical actions. Its implementation must be multidisciplinary, involving, on the basis of the action plan proposed by the occupational physician, all of the experts involved in the development of work processes, the layout and design of workstations, such as production engineers, quality engineers, industrial hygienists, ergonomist, architects, but also the expert in the work situation; the operator himself.

Finally, additional study of thermal stress taking into account dependencies and synergistic factors and operators' differences should be performed.
