Key Takeaways
- NFPA 1620 defines exactly what a compliant pre-incident plan must contain — it’s a data specification, not a training document
- ISO awards points for pre-planning programs that follow NFPA 1620 — plans must be current, documented, and accessible to responding personnel
- Most departments underperform in pre-incident planning not from lack of capability, but because the process is paper-heavy and hard to maintain
- A compliant pre-plan covers eight core data categories — from building ID and site access to hazmat inventory and floor diagrams
NFPA 1620 is the standard that defines what a fire department pre-incident plan should contain. It’s also one of the least-read documents in the fire service — not because departments don’t care about pre-planning, but because the standard reads like a standard.
This post translates NFPA 1620 into plain language: what a compliant pre-plan needs to include, why each component matters operationally, and how it connects to your ISO rating.
What Is NFPA 1620?
NFPA 1620 — Standard for Pre-Incident Planning — was most recently revised in 2020. It establishes the minimum requirements for developing, maintaining, and using pre-incident plans.
A pre-incident plan is a document or data record capturing critical information about a specific building before an emergency occurs. The goal is to give responding firefighters actionable building intelligence — without requiring them to learn it for the first time during a live incident.
NFPA 1620 is a data specification. It defines what to collect, how to organize it, and how to make it accessible. Pre-planning done in advance beats pre-planning done while the building is on fire.
Who Should Have a Pre-Plan?
The standard identifies a hierarchy of occupancy types to prioritize:
Tier 1 — High Priority: Assembly occupancies (churches, theaters, event venues), high-rise buildings, hospitals and care facilities, schools, large industrial facilities, hazardous materials sites.
Tier 2 — Medium Priority: Large commercial buildings, warehouses, multi-family residential (4+ units), hotels, government buildings.
Tier 3 — Routine: Standard commercial occupancies, small apartment buildings, any building in your first-due area that hasn’t been surveyed.
For ISO purposes, these are called target hazards — and ISO tracks what percentage of yours have documented, current pre-plans.
The Eight Core Components of a Compliant Pre-Plan
1. Building Identification and General Information
Address and all access points, occupancy classification, construction type (Type I through Type V), year built and major renovations, square footage and number of floors, owner/manager contact.
Why it matters: Construction type tells the incident commander how long the structure will realistically withstand fire before collapse risk increases. Getting it wrong is a life-safety issue.
2. Site Plan and Access Information
Site diagram with building footprint and access roads, all entry points including locked gates, Knox Box location, aerial access points and overhead obstructions, hydrant locations and FDC connections, access hazards like narrow roads or seasonal closures.
Why it matters: A minute spent finding the right entrance or repositioning a ladder truck is a minute not suppressing fire.
3. Fire Protection Systems
Sprinkler system type and coverage, FDC location and thread type, standpipe outlet locations, fire alarm panel location and zone map, any special suppression systems (clean agent, CO2, foam), last inspection date.
Why it matters: Finding the FDC in the dark, knowing which floors are sprinkled, knowing whether the alarm is monitored — these are the details that compress the time between arrival and effective action.
4. Utilities
Electrical main disconnect location and voltage, natural gas meter and main shutoff, water main shutoff and backflow preventer, any other significant utilities (fuel oil, propane, steam).
Why it matters: Utility control is a first-priority task at working structural fires. The faster you isolate them, the safer the interior becomes.
5. Hazardous Materials
Chemical inventory with quantities and storage locations, SDS sheet location, Tier II filing status, any special storage concerns (lithium-ion batteries, compressed gases, flammable liquids above thresholds).
Why it matters: Firefighters can’t improvise around hazmat they don’t know is there. A pre-plan that identifies a chemical storage room before arrival is the difference between a controlled operation and a mass casualty event.
6. Occupancy Information
Normal occupancy load, population characteristics (mobility-impaired populations, hours of operation, after-hours contacts).
7. Diagrams and Floor Plans
Floor plan for each level showing room layout, stairwells, corridors, and exits. Roof diagram showing HVAC, skylights, and construction type. Annotations marking hazards, utility shutoffs, FDC locations, and critical points.
Why it matters: Visual spatial information is processed faster than text under stress. A well-annotated floor plan communicates in seconds what a paragraph can’t.
8. Pre-Plan Maintenance
NFPA 1620 covers the lifecycle of a pre-plan, not just its creation. Required elements: a regular review schedule (at minimum when significant changes occur, annually for high-priority occupancies), documented update triggers (renovation, change of occupancy, new hazmat, changes to fire protection systems), revision documentation, and personnel familiarization.
Why it matters for ISO: ISO gives credit for plans that are current. A five-year-old pre-plan for a renovated building isn’t just unhelpful — it’s a liability. ISO evaluators will ask about your review process, not just your plan count.
The NFPA 1620 / ISO Connection
ISO’s FSRS explicitly scores pre-incident planning. Evaluators look for three things: a department-wide program with clear procedures, documentation that target hazards have been surveyed, and evidence that plans are current and that personnel know them.
Compliance with NFPA 1620 isn’t just best practice. It’s directly tied to your score.
The Reality in Volunteer Departments
Most volunteer departments understand pre-planning conceptually. The challenge is execution: collecting field data systematically, organizing it in a format responders can use on scene, and maintaining currency as buildings change.
Paper pre-plans go out of date and get lost. Spreadsheets don’t work on a phone at an incident. Proprietary systems are expensive and designed for large departments with administrative staff.
The gap between knowing you should pre-plan and having an operational program that covers your target hazards — that’s the gap modern mobile pre-planning platforms are built to close.
We’ve distilled the NFPA 1620 requirements into a two-page field checklist. Use it to assess your current pre-plans, train new members on what to collect, and identify gaps in your target hazard coverage.
The Pre-Plan Field Checklist is coming soon.
In the meantime, take the free ISO Readiness Assessment to see where your department stands on ISO’s pre-planning criteria specifically:
→ Take the Free ISO Readiness Assessment
Freedom From Dissonance is building a mobile-first pre-incident planning platform built around NFPA 1620 requirements for volunteer and combination fire departments. Pilot program applications open now. Learn more →