During an inspection, it is determined that the installation of a new suppression system is significantly different from the one approved during…

When an inspector discovers that an installation is significantly different from the plans that were approved, the original plan review and approval are no longer valid for the work performed. The fundamental first step is to correct the documentation. The inspector must require the contractor or owner to submit a new set of corrected or "as-built" plans that accurately represent the system as installed. This allows the Authority Having Jurisdiction (AHJ) to properly review the modified design against code requirements. Only after the revised plans are reviewed and approved can the inspector conduct a valid field inspection to verify compliance.

A. Issue a violation notice to the owner: This may be a subsequent action, but the immediate procedural step is to obtain corrected plans to properly evaluate the non-conforming installation.

B. Evaluate the installation for compliance: The inspector cannot properly evaluate the system for compliance without an accurate set of approved plans that reflect the actual installation.

D. Indicate the modifications on the approved plan: This practice, known as "red-lining," is generally reserved for minor field modifications, not for installations that are "significantly different" from the approved design.

1. NFPA, Fire and Life Safety Inspection Manual, 9th Edition. Chapter 4, "The Inspection Process," Section: "Comparing the Installation with the Plans." The manual explains that for major discrepancies, the inspector should stop the inspection and require the contractor to submit revised plans for review. It states, "If the changes are major, the inspector should not approve the system and should require the contractor to submit a new set of plans for review" (p. 69).

2. NFPA 1, Fire Code, 2021 Edition. Section 1.7.12.1 states, "Work shall be installed in accordance with the approved construction documents." When the work deviates significantly, it is not in accordance with the approved documents, necessitating a new approval based on corrected plans.

3. NFPA 13, Standard for the Installation of Sprinkler Systems, 2022 Edition. Section 29.1.2, "Deviations," states, "Where deviations from the approved plans are necessary, the contractor shall obtain approval from the authority having jurisdiction prior to making the deviation." A significant, unapproved change requires a formal review process, which begins with submitting corrected plans.