Which hazard classification corresponds to moderate to high combustibility with specific height limits?

Which hazard classification corresponds to moderate to high combustibility with specific height limits?

• A. Light Hazard Occupancy
• B. Ordinary Hazard (Group 2)
• C. Residential Occupancies
• D. Ordinary Hazard (Group 1)

Answer: (B)

The situation described—moderate to high combustibility of contents with specific height limits—fits a higher level of fire load that requires more sprinkler density than the lighter category. Ordinary Hazard, Group 2 is used for spaces with a higher fire load than Group 1 and where ceiling height or space constraints influence the design, so the system must provide more water application to control a fire effectively. This makes it the best match for design scenarios that involve significant fuel load and height considerations in a low-rise residential context. Light Hazard would understate the fire load, and residential occupancies are typically treated differently in NFPA 13R, focusing on lighter hazards common to homes. Ordinary Hazard, Group 1 is less demanding than Group 2 and wouldn’t address the higher combustibility and height-related design needs described.

The situation described—moderate to high combustibility of contents with specific height limits—fits a higher level of fire load that requires more sprinkler density than the lighter category. Ordinary Hazard, Group 2 is used for spaces with a higher fire load than Group 1 and where ceiling height or space constraints influence the design, so the system must provide more water application to control a fire effectively. This makes it the best match for design scenarios that involve significant fuel load and height considerations in a low-rise residential context.

Light Hazard would understate the fire load, and residential occupancies are typically treated differently in NFPA 13R, focusing on lighter hazards common to homes. Ordinary Hazard, Group 1 is less demanding than Group 2 and wouldn’t address the higher combustibility and height-related design needs described.