21 - Fire Suppression
Fire suppression bid estimating, without the grind.
The sprinkler number is set less by the protected SF than by the hazard classification, the water supply that forces a fire pump, and the ceiling type that sets the heads. Drop in your package and get back a cited first-pass: sprinkler budgeted by hazard class but bid from hydraulic design, the fire-pump/NFPA-20 flag, and the RFIs that keep a fire-protection bid from missing the biggest cost line.
✓ PE-reviewable✓ Cited to source✓ Your fire suppression workflow
✓
REVIEWED
REVIEWED
Hydraulic design + shop drawings + permit (NICET)measure LS (real engineering line)— cite
Fire service entrance — backflow, riser, FDCmeasure EA— cite
Fire pump + controller (if required by pressure)measure EA— cite
Overhead distribution — mains, branch lines, dropsmeasure SF of protected area (planning) → heads + pipe (detailed)— cite
Sprinkler heads (by hazard/type/finish)measure SF of protected area (planning) → heads + pipe (detailed)— cite
6
governing codes
9
line-item groups
6
units of measure
6
risk flags
What it surfaces for fire suppression
Priced for the way fire suppression is actually bid.
The engine reads your package and flags exactly what bites fire suppression estimators — before it costs you.
Governing codes named: NFPA 13 (sprinkler installation — the governing standard; 13R/13D for residential), NFPA 14 (standpipe + hose), NFPA 20 (fire pumps), NFPA 25 (ITM — inspection, testing, maintenance for existing/tenant work), NFPA 24 (private fire service mains), FM Global/local fire marshal (insurer + AHJ requirements, often govern hazard classification).
Line-item groups your bid breaks into: hydraulic design + shop drawings + permit (NICET); fire service entrance — backflow, riser, FDC; fire pump + controller (if required by pressure); overhead distribution — mains, branch lines, drops; sprinkler heads by hazard/type/finish; standpipes + hose valves (NFPA 14); underground fire main (NFPA 24); specialty systems — pre-action, dry, clean-agent, kitchen (NFPA 96/2001); testing, flushing, AHJ final inspection.
The fire-suppression risks ranked: fire pump requirement (whether water supply forces an NFPA 20 pump is the biggest cost swing — hinges on the flow test); hazard classification (storage/extra-hazard drastically increases density, pipe, heads); ceiling/head coordination (concealed vs. exposed); underground main scope split; seismic bracing (NFPA 13); AHJ/permit + design.
The RFIs drafted (verbatim): "Confirm the hazard classification (NFPA 13 light/ordinary group 1-2/extra hazard) per area and the design density?" "Water supply: is there a recent flow test, and does the available pressure require a fire pump (NFPA 20)?" "Ceiling type by area (exposed grid, concealed lay-in, hard-lid) — which sets head type, finish, and drop count?"
The trade's anatomy
Everything fire suppression needs, structured.
Line-item groups
Hydraulic design + shop drawings + permit (NICET)Fire service entrance — backflow, riser, FDCFire pump + controller (if required by pressure)Overhead distribution — mains, branch lines, dropsSprinkler heads (by hazard/type/finish)Standpipes + hose valves (NFPA 14)Underground fire main (NFPA 24, if in scope)Specialty systems — pre-action, dry, clean-agent, kitchen (NFPA 96/2001)Testing, flushing, and AHJ final inspection
Governing codes
NFPA 13 · installation of sprinkler systems (the governing standard; 13R/13D for residential)NFPA 14 · standpipe + hose systemsNFPA 20 · stationary fire pumpsNFPA 25 · inspection, testing, and maintenance (ITM) — for existing/tenant workNFPA 24 · private fire service mains (underground)FM Global / local fire marshal · insurer + AHJ requirements (often govern hazard classification)
Units of measure
sprinkler system → SF of protected area (planning) → heads + pipe (detailed)sprinkler heads → EA (by type/temperature/finish)pipe → LF (by size + method: threaded, grooved, welded, CPVC)fire pump / riser / backflow / valves → EAunderground fire main → LFhydraulic design / permit → LS (real engineering line)
The risks that usually bite
Fire pump requirementHazard classificationCeiling / head coordinationUnderground main scope splitSeismic bracingAHJ / permit + design
“"Sprinkler's a $/SF budget bid; the heads and pipe come from the hydraulic calc."”
Exactly — and the hydraulic calc hinges on two things a $/SF number can't tell you: the hazard classification (which sets density, pipe, and heads) and the water supply (which decides whether you need an NFPA 20 fire pump — the biggest single cost swing on a sprinkler job). The analysis surfaces both from the set, flags the ceiling type that sets head count, and pulls the design/permit/AHJ lines into the bid instead of leaving them as a surprise. Cited hands clean to the NICET designer/PE.
Run this on your own fire-suppression package.
30 minutes. Bring a real set — a storage/extra-hazard occupancy, a job without a recent flow test, or one needing a fire pump — and watch the cited line items, the hazard + water-supply flags, and the hydraulic-design RFIs on your actual drawings.