Fire protection drawings get reviewed by fire marshals, building department plan examiners, and third-party reviewers who specialize in life safety. These reviewers check sprinkler systems against NFPA 13, fire alarm systems against NFPA 72, means of egress against NFPA 101 and the IBC, and fire-rated construction against IBC Chapters 7 and 9. A single missing item on any of these systems can hold up the entire building permit.
This checklist covers the 10 fire protection plan review issues that generate the most comments across sprinkler, fire alarm, and life safety submittals. It is organized by system, starting with the sprinkler drawings, moving to fire alarm, then life safety and documentation.
Sprinkler system
1. Design basis and hazard classification
The sprinkler plan must state the installation standard (NFPA 13, 13R, or 13D), the occupancy hazard classification for every protected area, and the design density and remote area used in the hydraulic calculations. The hazard classification drives everything downstream: sprinkler spacing, pipe sizing, water supply duration, and the number of design sprinklers. Light Hazard (offices, churches, hospitals) uses lower densities than Ordinary Hazard Group 2 (mercantile, manufacturing) or Extra Hazard (flammable liquids, high-piled storage). A warehouse with rack storage above 12 feet must use the storage chapters (NFPA 13 Chapters 12 through 20), not the occupancy hazard classification. Reviewers flag plans that classify the entire building as Light Hazard without addressing high-hazard areas like mechanical rooms, loading docks, or storage mezzanines.
2. Sprinkler spacing, deflector position, and temperature rating
NFPA 13 limits the maximum coverage area and maximum spacing between sprinklers based on the hazard classification and ceiling construction. Light Hazard permits up to 225 square feet per sprinkler with 15-foot maximum spacing. Ordinary Hazard limits coverage to 130 square feet per sprinkler. Plan reviewers measure spacing on the floor plan and compare it to the applicable table. They also check the deflector distance below the ceiling (1 inch minimum, 12 inches maximum for standard pendent sprinklers in most applications). Near heat sources like unit heaters, boilers, or skylights, reviewers check that Intermediate (175 to 225 degrees F) or High (250 to 300 degrees F) temperature rated sprinklers are specified instead of the standard Ordinary (155 degrees F) rating. Temperature rating mismatches near heat sources are one of the most common sprinkler plan review comments.
3. Hydraulic calculations and water supply
NFPA 13 requires hydraulic calculations proving the sprinkler system can deliver the design density over the remote area with the available water supply. The reviewer checks that the hydraulic calculations include the most demanding area (typically the area with the highest density, longest pipe runs, or highest elevation), that friction losses are calculated for each pipe segment, and that the demand point plots below the water supply curve. They verify the water supply source (city main, fire pump, storage tank) and check that flow test data is current (within 12 months). For buildings with a fire pump, they check pump curves, controller type, and automatic transfer switch for the backup power source. Missing or outdated flow test data is a common reason for plan review holds.
Fire alarm system
4. Initiating device placement and spacing
NFPA 72 governs detector placement and spacing. Spot-type smoke detectors use a 30-foot nominal spacing in rooms with flat ceilings up to 10 feet high. As ceiling height increases, the spacing must be reduced per Table 17.6.3.5.1, and above 30 feet, smoke detectors require engineering analysis or alternative placement. Heat detectors use their listed spacing reduced by ceiling height factors. Duct smoke detectors are required in air handling units exceeding 2,000 CFM. Reviewers check detector spacing on the floor plan, verify that detectors are shown in all required spaces (corridors, mechanical rooms, elevator lobbies, above drop ceilings where required), and confirm that the detector type matches the application. Smoke detectors in dusty or humid environments will nuisance alarm and should be replaced with heat detectors or beam detectors where appropriate.
5. Notification appliance coverage
Visible notification appliances (strobes) must provide the required candela rating based on room size per NFPA 72 Table 18.5.5.5.1. A single 15-candela strobe covers a room up to 20 by 20 feet. A 75- candela strobe covers up to 45 by 45 feet. Larger rooms require multiple strobes or higher-candela units. Audible notification appliances must produce at least 15 dB above the average ambient sound level, or 5 dB above the maximum sound level lasting more than 60 seconds, whichever is greater. In sleeping areas (hotels, dormitories, residential), the alarm must produce 75 dBA at the pillow and include a 520 Hz low-frequency audible signal. Reviewers check the candela rating schedule against room dimensions, verify audible coverage in high-ambient-noise areas (mechanical rooms, kitchens), and confirm sleeping area compliance for applicable occupancies.
6. System monitoring and circuit survivability
All sprinkler valve tamper switches and waterflow alarm devices must be connected to the fire alarm system and monitored by a listed central station, proprietary station, or remote supervising station. Fire alarm circuits must be classified per NFPA 72 Chapter 12: Class B circuits provide basic monitoring, while Class A circuits provide redundant pathways that maintain operation if a single open or ground fault occurs. High-rise buildings, healthcare facilities, and some assembly occupancies require Class A circuits. Reviewers check the riser diagram for monitoring connections, verify the circuit class on the fire alarm riser, and confirm the supervising station monitoring type is specified in the sequence of operations. Missing valve supervision is a consistently flagged item.
Life safety and fire-rated construction
7. Fire-resistance-rated separations and penetrations
IBC Chapters 6 and 7 require fire-resistance-rated separations between occupancies, between dwelling units, at shaft enclosures, and at exit stairway and corridor enclosures. The required ratings depend on construction type and occupancy. Reviewers check the wall type schedule for rated assemblies and verify that the specified assemblies (referencing UL design numbers or GA manual numbers) actually achieve the required rating. They trace rated walls on the floor plan and check that every penetration (pipes, ducts, conduits, cable trays) has a firestop detail referencing a listed firestop system. They verify that doors in rated walls have the correct fire rating (typically 3/4 of the wall rating) and are shown with closers and latches on the door schedule. Duct penetrations through rated assemblies must have fire dampers (at fire barriers) or combination fire/smoke dampers (at smoke barriers). Missing firestop details and missing fire dampers are consistently among the top fire protection plan review comments.
8. Means of egress capacity and travel distance
IBC Chapter 10 and NFPA 101 Chapter 7 require the means of egress to accommodate the occupant load with adequate width, number of exits, and travel distance limits. Reviewers start with the occupant load calculation (floor area divided by the occupant load factor from the applicable table) and trace the egress path from each space to the exit. They check that the number of exits matches the occupant load thresholds (two exits when the occupant load exceeds the table limits, three exits above 500, four exits above 1,000). They verify exit access travel distance does not exceed the maximum for the occupancy (typically 200 feet unsprinklered, 250 feet sprinklered for most occupancies). They check common path of travel limits, dead-end corridor limits, and exit separation distance (at least one-half the maximum diagonal in sprinklered buildings, one-third in unsprinklered). Missing occupant load calculations or unstated travel distances are flagged on almost every first-round review.
9. Exit signs and emergency lighting
NFPA 101 Section 7.10 requires illuminated exit signs at every required exit doorway and along the exit access path where the direction of egress is not immediately apparent. Exit signs must be visible from any point in the exit access corridor. NFPA 101 Section 7.9 requires emergency lighting along the entire means of egress with a minimum 1 foot-candle average and 0.1 foot-candle minimum at the floor. Emergency lighting must operate for at least 90 minutes on battery backup. Reviewers check that exit signs are shown on the reflected ceiling plan with directional arrows where needed, that emergency lighting fixtures are spaced to provide the required illumination levels, and that the emergency power source (battery units, generator, or central inverter) is identified on the drawings. A common oversight is omitting emergency lighting in stairway enclosures or at the exit discharge outside the building.
Documentation and coordination
10. Sequence of operations and system coordination
Fire protection systems do not operate in isolation. The fire alarm sequence of operations must describe what happens when each initiating device activates: which notification appliances sound, which HVAC systems shut down, which smoke dampers close, which elevator recalls activate, and which doors release. Reviewers check the sequence matrix for completeness and cross-reference it with the HVAC drawings (for duct smoke detectors and fan shutdown), elevator drawings (for firefighter service recall), and door hardware schedule (for magnetic hold-open release). They verify that the fire alarm control panel has enough zones, circuits, and input/output points to support the specified sequence. They check that the fire department connection (FDC) is shown on the site plan at a location accessible to apparatus. Incomplete sequences and missing FDC locations are among the most common documentation comments.
Catching these issues before submittal
Fire protection plan review touches more codes simultaneously than any other discipline: IBC Chapters 7 and 9, NFPA 13, NFPA 72, NFPA 101, the IFC, and often local amendments on top. A first-pass review that checks hazard classification, sprinkler spacing, detector placement, rated construction, and egress calculations before the plans leave your office eliminates the bulk of correction comments. Using an automated review tool that checks against all applicable codes in a single pass, including fire-protection-specific standards, catches the cross-code conflicts that are hardest to find manually.