What type of facility is typically used to store class/division 1.3 and 1.4 munitions?

The correct answer is a clay-tile storage warehouse, which is designed to provide adequate protection and fire resistance necessary for the storage of class/division 1.3 and 1.4 munitions. These types of munitions are classified due to their moderate potential for explosion or fire hazards. The clay-tile construction offers a balance of structural integrity and fire resistance while also allowing for sufficient ventilation, which is crucial in reducing the risk of thermal buildup and potential ignition sources.

Storing munitions of these classifications in facilities like reinforced concrete bunkers, while very secure, typically applies to higher-risk munitions with more severe hazard classifications (such as class/division 1.1 or 1.2), where the likelihood of detonation is much greater. Open air facilities and wooden storage sheds do not provide the necessary protection or safety standards required for even moderate hazard classes like 1.3 and 1.4. The use of appropriate materials and designs is critical in munitions storage to mitigate risks associated with explosive materials.