Constructions, along with the agriculture branch , involves a large part of the workforce of the country. However, this kind of activity involves a multitude of risks of occurrence of accidents at work as well as occupational illnesses. Therefore, it is necessary to adopt specific rules in this area to ensure the safety and health of employees working in this sector of the economy. On the strength of the right to organization of work (production), and by virtue of ownership, it is natural the employer to respond of health and safety of employees in all aspects of legal work. Our legislator has implemented the principle that the employer almost unconditionally respond of health and safety of employees, whether these powers are exercised personally, whether it entrusts this task to another person. It is conceivable that the performance of work to be carried out with health and safety at work, the whole activity is governed by the imperative of preventing occupational risks.