Fire protection and prevention in buildings refers to all safety measures necessary for the construction, operation and maintenance of buildings, and therefore requires structural members such as beams and columns to be fire resistant.The rise in temperature in a building causes construction materials to undergo transformations and/or changes in their mechanical properties. The heat fractures and breaks the work as its components expand, varying the resistance of the different structural elements, modules of elasticity, critical loads and bearing capacity, which can trigger a collapse of the building.The fire stability of an element can no longer be guaranteed when, under the effect of a rise in temperature, its mechanical resistance decreases to a certain level (deformation). At that moment, the critical temperature and minimum reaction time (in minutes) are reached. Therefore, adequate protection of the structural elements of wood and steel in a building leads to the preventionof possible collapse of the structure by the action of fire and the protection of human lives.