Check that every fire safety symbol on the drawings appears in the project legend with one meaning, that the legend agrees with the standard the specifications name, and that the same device uses the same symbol on every discipline’s sheets. AI can flag mismatches; the designer confirms the intended meaning.
What does NFPA 170 cover?
NFPA 170 is the Standard for Fire Safety and Emergency Symbols. NFPA describes it as providing standard symbols used to communicate fire safety, emergency, and associated hazards information, so that uniform symbols on labels and signs improve consistency and communication.
NFPA’s official NFPA 170 page identifies the 2024 edition as current when checked on October 2, 2026. Confirm the edition, local amendments, and project scope that actually govern the work. The publisher’s newest edition does not establish local adoption.
Projects often use office or software symbol libraries rather than the standard. Record whether the specifications or the authority call for NFPA 170 symbols and for which documents, such as fire alarm drawings, evacuation plans, or signage. The abbreviations and symbols guide covers drawing symbols in general.
Collect the legends and every sheet that uses them
Bring the general symbol legend, each discipline’s legend, the fire alarm, sprinkler, and fire protection drawings, life safety plans, evacuation or fire safety plans, and the signage drawings and specifications.
Many sets carry more than one legend. Note which legend each sheet refers to, and record symbols that appear on sheets but in no legend.
Check each symbol has one meaning
| Review question | Sources to compare | Decision to record |
|---|---|---|
| Legend coverage | Discipline legends, plan sheets | List symbols used on sheets that no legend defines. |
| Duplicate meanings | General legend, fire alarm legend, sprinkler legend | Resolve one symbol defined differently in two legends. |
| Same device, same symbol | Fire alarm plans, sprinkler plans, life safety plans | Identify a device drawn with different symbols across disciplines. |
| Standard named | Fire alarm and signage specifications, general notes | Confirm whether the project requires NFPA 170 symbols and where. |
| Signage | Signage drawings, schedule, specifications | Match the symbols on fire safety signs with the specified standard. |
| Evacuation plans | Fire safety or evacuation plan drawings, legend | Check that orientation plans use the same symbols as their legend. |
Carry device questions into the NFPA 72 guide and the fire alarm drawing checklist. Interior signs follow the interior signage specifications guide.
Example: one symbol, two devices
Hypothetical example. The fire alarm legend uses a symbol for a smoke detector, while the general legend from the architect uses the same symbol for a ceiling-mounted speaker. Both appear on the same reflected ceiling plan.
The fire alarm legend and the general legend define this symbol differently, and both legends apply to this reflected ceiling plan. Please confirm what the symbol represents here and align the legends.
The architect and fire alarm designer agree one meaning and revise the legend. A symbol conflict is a clarity question; whether the device layout complies is the designer’s decision.
Review symbols with Groundbook
Upload the current project PDFs and relevant specifications to Groundbook. Identify the governing issues and add the applicable NFPA 170 reference from a copy you are licensed to use, where the license permits uploading it. State the edition, amendments, review area, and known exclusions in your instructions.
Compare the symbols on the fire alarm, sprinkler, life safety, evacuation, and signage drawings with every legend in the set. Flag symbols missing from legends, symbols defined twice, and devices drawn with different symbols. Use the supplied NFPA 170 reference where applicable and cite both sources.
Groundbook links each potential finding to the sheets and legends behind it. Confirm which legend governs a sheet before asking a question.
Document review does not choose the project’s symbol standard or approve signage. Those remain with the designers, the owner, and the authority having jurisdiction.