In what size bathrooms are sprinklers not required where a fire sprinkler system is installed?

• A. 45 square feet
• B. 55 square feet
• C. 65 square feet
• D. 75 square feet

Answer: (B)

The requirement for sprinklers in bathrooms where a fire sprinkler system is installed is influenced by the overall size of the bathroom space. In homes with fire sprinkler systems, specific areas are exempt from requiring additional sprinkler coverage based on their square footage.

In this case, bathrooms that are 55 square feet or smaller are not required to have a separate sprinkler installation when a fire sprinkler system is already present in the building. This exemption is based on the understanding that smaller bathrooms typically have limited fire load and volume, making sprinkler systems less critical for fire suppression in these spaces compared to larger areas.

Larger bathrooms, however, may have different fire risks due to increased space and potential for more furnishings or materials that could contribute to a fire, thus necessitating the installation of sprinklers. The 55 square feet threshold provides a clear guideline for inspectors and builders, ensuring that fire safety protocols are appropriate and proportionate to the risk presented by the size of the bathroom.