Find the corridors and exits on the code plan, then check that the floor finish shown in each one on the finish plans is specified with a radiant flux class, and that the product data supports the class the specifications name. AI can flag conflicts; the architect and the authority having jurisdiction decide compliance.
What does NFPA 253 cover?
NFPA 253 is the Standard Method of Test for Critical Radiant Flux of Floor Covering Systems Using a Radiant Heat Energy Source. NFPA’s page states that the standard presents a method for evaluating critical radiant flux of floor coverings in corridors or exitways, providing a basis for estimating one aspect of the fire exposure behavior of floor covering systems.
NFPA’s official NFPA 253 page identifies the 2023 edition as current when checked on October 11, 2026. Confirm the edition, local amendments, and project scope that actually govern the work. The publisher’s newest edition does not establish local adoption.
The adopted building or life safety code decides which corridors and exits need a floor finish class and which class; see the NFPA 101 guide. The test applies to the floor covering system, so the underlayment or cushion matters as well as the carpet or resilient product. Record the required classes by area before comparing.
Gather the exit routes and the floor finishes
Collect the code or life safety plan with corridors and exits, the finish plans and finish schedule, the carpet, resilient flooring, and underlayment specifications, the occupancy information, and the manufacturer’s data showing the radiant flux classification of each floor covering system.
Finish plans are often revised for color and pattern without revisiting the code plan. Upload both at their current issue so a product change in a corridor is caught.
Match each corridor and exit with its floor finish
| Review question | Sources to compare | Decision to record |
|---|---|---|
| Exit routes | Code plan, floor plans, room names | Confirm which corridors, stairs, and exit passageways are identified the same way on every plan. |
| Finish in each route | Finish plans, finish schedule, code plan | Check that every corridor and exit on the code plan has a floor finish shown on the finish plans. |
| Required class | Specifications, finish schedule notes, code plan | Find corridor floor finishes specified without a radiant flux class, or with a class that differs between sources. |
| Product evidence | Product data, specifications, submittals | Match each corridor product’s data with the class the specifications require. |
| Cushion and underlayment | Underlayment specification, flooring details, product data | Ask the architect to confirm the tested system includes the cushion or underlayment specified. |
| Substitutions | Submittals, finish schedule, specifications | Identify substituted floor coverings in corridors that lack classification data. |
The carpet specifications guide and the resilient flooring guide follow the same floors from the specification side. Wall and ceiling finishes connect to the NFPA 286 guide, and exit routes to the IBC Chapter 10 guide.
Example: a carpet change in an exit corridor
Hypothetical example. A senior living project changes the corridor carpet for a patterned product from a different manufacturer. The finish schedule shows the new product in every corridor, while the carpet specification still lists the original product’s radiant flux class and the submittal includes no classification data.
The finish schedule places a new carpet in the exit corridors, but the specification still lists the original product’s class and the submittal has no radiant flux classification for the new product. Please confirm the class required and coordinate the product evidence.
The interior designer obtains the classification data or selects a classified product and updates the specification. Compliance is decided by the architect and the authority having jurisdiction.
Review corridor floor coverings with Groundbook
Upload the current project PDFs and relevant specifications to Groundbook. Identify the governing issues and add the applicable NFPA 253 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 code and life safety plan, floor plans, finish plans and schedule, carpet, resilient flooring, and underlayment specifications, and product data and submittals. Flag corridors and exits whose floor covering has no class, a class that differs between sources, or missing product evidence. Use the supplied NFPA 253 edition and adopted code where applicable and cite both sources.
Groundbook links each potential finding to the sheets involved and the reference you uploaded.
Document review does not test or classify a floor covering, interpret a test report, or approve a product. Those decisions remain with the architect and the authority having jurisdiction.