Which factor is crucial in evaluating the fire hazard of a construction site?

The materials being used and stored on a construction site are crucial in evaluating the fire hazard because they have a direct impact on how easily a fire can ignite and spread. Different materials possess varying levels of combustibility and flammability; for instance, some building materials may ignite quickly while others might be more resistant to flames. Additionally, the presence of flammable liquids, gases, or other hazardous substances intensifies the risk, creating a need for careful management and storage of these materials to prevent accidents. Understanding the nature of the materials helps in developing appropriate fire safety measures, such as ensuring proper separation, containment, and access to extinguishing equipment, thereby enhancing the overall safety of the construction site.