Floor structure provided with a fire protection system for railway vehicles

A floor structure for a railway vehicle, the floor structure comprising:

• an underframe that is elongated along a longitudinal axis, coincident with an advancement axis of the railway vehicle;
• the underframe comprising a lower surface and a plurality of attachment rails arranged at least on an area of said lower surface;
• the attachment rails being parallel to said longitudinal axis and projecting downwards from said area, so as to define a plurality of compartments horizontally between said attachment rails;
• a fire protection system that covers said area;
• said fire protection system comprising:
• a plurality of panels arranged in said plurality of compartments;
• a plurality of section bars fixed to said attachment rails;
• said plurality of section bars being shaped so as to retain said plurality of panels in fixed positions in said compartments and, simultaneously, cover said attachment rails;
• wherein each of said panels comprises a respective metal container and respective insulating material;
• wherein said metal containers are closed containers containing the insulating material.