What is the maximum protection area described for Ordinary Hazard systems according to NFPA 13?

The maximum protection area for Ordinary Hazard systems as defined in NFPA 13 is set at 52,000 square feet. This figure is specified to ensure that the fire suppression capabilities are appropriate for the types of hazards typically found in these environments, which are characterized by moderate combustibility and the possibility of frequent occupancy.

Ordinary Hazard is divided into two groups—Group 1 and Group 2—each with specific criteria for evaluating the potential fire risk. The maximum area provides a guideline for system design, ensuring that the sprinklers can adequately cover the space and effectively respond to potential fire scenarios.

Understanding the specifications provided by NFPA 13 helps professionals in fire protection design and engineering to determine appropriate sprinkler system layouts to ensure adequate safety measures are in place while adhering to code requirements. This adherence not only promotes safety but also influences insurance ratings and compliance with local building regulations.