It is true that updated plans are required for alterations involving more than 20 sprinklers.

It is true that updated plans are required for alterations involving more than 20 sprinklers.

• A. True
• B. False
• C. Only if the alteration affects the water supply
• D. Only for new construction

Answer: (A)

When modifying an existing fire sprinkler system, keeping plans up to date is essential, especially for larger changes. If the alteration involves more than 20 sprinklers, updated plans are required so the authority having jurisdiction can review the new layout and verify that hydraulics, coverage, valve locations, and water supply still meet current code requirements. This ensures the system will perform as designed after the modification and that inspections rely on accurate, current drawings. The requirement isn’t limited to changes that affect the water supply alone, because relocating or adding many sprinklers can alter hydraulics and zoning even if the supply itself doesn’t change. It also isn’t about new construction—the focus here is on alterations to an existing system, with the threshold at more than 20 sprinklers.

When modifying an existing fire sprinkler system, keeping plans up to date is essential, especially for larger changes. If the alteration involves more than 20 sprinklers, updated plans are required so the authority having jurisdiction can review the new layout and verify that hydraulics, coverage, valve locations, and water supply still meet current code requirements. This ensures the system will perform as designed after the modification and that inspections rely on accurate, current drawings.

The requirement isn’t limited to changes that affect the water supply alone, because relocating or adding many sprinklers can alter hydraulics and zoning even if the supply itself doesn’t change. It also isn’t about new construction—the focus here is on alterations to an existing system, with the threshold at more than 20 sprinklers.