What hazard divisions (HD) of explosives can be stored in a magazine that provides weather protection and meets Q-D requirements?

• A. HD 1.1 and HD 1.2
• B. HD 2.0
• C. HD 1.3 and HD 1.4
• D. HD 0.4

Answer: (C)

Hazard divisions categorize explosives by the severity of effects in an accident. A weather-protected magazine that meets Q-D requirements is designed for storing items with lower risk profiles, not for the most severe hazards. Explosives in HD 1.3 have a fire hazard with only a minor blast or projection, and those in HD 1.4 pose no significant hazard beyond the packaging. The magazine’s containment and design are suitable for these levels because the potential consequences are limited and can be contained with standard weather protection and the approved magazine design. Higher hazards, like HD 1.1 or 1.2, involve mass explosion or projection risks and require magazines with stricter design and safety features, while HD 0.4 covers a different, extremely insensitive category that is not the target for a weather-protected Q-D magazine. Therefore, the best fit for a weather-protected magazine meeting Q-D requirements is HD 1.3 and HD 1.4.