In alterations involving 20 sprinklers or fewer, and all floor areas were protected prior to the alteration, updated plans are not required.

• A. No, updated plans are not required.
• B. Yes, updated plans are required.
• C. Only if the alteration involves a change to the water supply.
• D. Only if the building is over three stories tall.

Answer: (A)

This question hinges on an exemption for minor alterations to a sprinkler system. When an alteration involves twenty sprinklers or fewer and all floor areas remained protected before the work, there’s no requirement to update the installation drawings. The idea is that such small changes don’t affect the overall protection layout, so the existing plans continue to accurately reflect how the system protects the space. Keeping the documentation unchanged in this scenario avoids unnecessary revisions, provided the protection coverage was maintained throughout the alteration. If more than twenty sprinklers are involved, or if any area would be left unprotected during the work, updated plans would be required to reflect the new configuration and coverage.