What Does UL 10C / NFPA 80 Require for Fire Doors from China on US Projects?

A fire door for a US commercial building has to be tested under positive pressure to UL 10C or NFPA 252, carry a permanent label from an approved listing agency, and be installed and maintained to NFPA 80 — and the rating belongs to the whole assembly, not to the door leaf. A 90-minute leaf hung in an unlabelled frame with unlisted hinges and an oversized vision panel is not a 90-minute door, and a fire marshal will fail it at handover whatever the factory’s certificate says. This guide explains how NFPA 80 sits under IBC Section 716, why the US market moved from UL 10B to UL 10C, which rating belongs in which wall, what the label must show and what voids it, and what a door sourcing agent and sourcing partner checks before the order goes into production.

What Do NFPA 80 and IBC Section 716 Require for Fire Doors?

The International Building Code sets the fire-resistance rating of the wall in Chapter 7; Section 716 then sets what may be put in a hole in that wall. NFPA 80, Standard for Fire Doors and Other Opening Protectives, is the referenced standard for installation, clearances, field modification, acceptance and ongoing inspection. NFPA 101, the Life Safety Code, references the same standard, so a hospital under CMS rules and a hotel under the IBC end up with almost identical paperwork.

• Test standards: fire door assemblies are tested to NFPA 252 or UL 10C, and fire window assemblies to NFPA 257 or UL 9. IBC Section 716 names them explicitly.
• Labels are mandatory: the door, the frame and any fire-rated glazing each carry their own permanent label from an approved listing agency. There is no unlabelled fire door with a valid certificate.
• Self-closing and positive-latching: every fire door must close and latch on its own under NFPA 80. Roller latches and closers removed after handover are the commonest punch-list failures.
• Acceptance and annual inspection: NFPA 80 requires an acceptance inspection at installation and inspection and testing not less than annually thereafter, with a written record kept for the authority having jurisdiction.
• Listings are product-specific: a listing covers a named manufacturer, construction, maximum size and hardware set. Anything outside those limits is outside the listing.

What Is the Difference Between UL 10C and UL 10B, and Why Does the US Need 10C?

UL 10B is Fire Tests of Door Assemblies, run at neutral pressure. UL 10C is Positive Pressure Fire Tests of Door Assemblies. In the 10C test the neutral pressure plane is established no higher than 40 inches (1,016 mm) above the sill within the first five minutes, so most of the door face sits in positive pressure and hot gas is driven out through the perimeter gaps rather than drawn in. It is a harder test, and the one US model codes have called for since the 2000-era editions.

• Edge sealing categories: a Category A door is listed with its edge sealing system already applied in the factory; a Category B door only reaches its rating when a listed intumescent seal kit is applied, so if that kit is missing from the container the assembly is not compliant.
• Hose stream test: after the fire exposure the assembly is hit with a hose stream at 30 psi nozzle pressure. Twenty-minute doors may be tested without the hose stream, in which case the label states it and the door’s permitted locations narrow.
• Old listings do not carry over: a UL 10B report cannot be re-badged as UL 10C, because positive pressure usually forces a different edge detail, seal and often core. The factory has to test again.

Which Fire Door Rating Belongs in Which Wall?

IBC Table 716.1(2) maps the wall rating to the required opening protective. The rule of thumb that a two-hour wall takes a 90-minute door holds because opening protectives are permitted a lower rating than the wall around them. Confirm the table against the edition your jurisdiction has adopted, but the mapping is stable across recent cycles.

• Fire walls and fire barriers rated 3 or 4 hours: 3-hour (180-minute) door assembly.
• 2-hour fire barriers, including interior exit stairways, exit passageways and shaft enclosures: 90-minute door assembly.
• 1-hour interior exit stairways, exit passageways and shaft enclosures: 60-minute door assembly; other 1-hour fire barriers, 45 minutes.
• Corridor walls built as fire partitions: 20-minute door assembly — the rating behind most hotel guest room and apartment entry doors, as our guide to fire door rating requirements for hotel corridors sets out.
• Smoke barriers: 20-minute door assembly, and the leaf normally also has to be a smoke and draft control door.
• Temperature rise doors: doors in interior exit stairways and exit passageways must limit the transmitted temperature rise on the unexposed face to 450°F (250°C) above ambient at 30 minutes of test exposure, unless the exception for a fully sprinklered building applies. Labels state 250°F, 450°F or 650°F at 30 minutes.
• Smoke and draft control doors: tested to UL 1784, air leakage not exceeding 3.0 cfm per square foot of door opening at 0.10 inch of water column, labelled with an S.

Why Must the Door, Frame, Hardware and Glazing Be One Listed Assembly?

Fire testing is done on a complete opening, so the listing describes a system and swapping any component voids it. This is where imported packages get into trouble: the leaf comes from one plant, the frame from another and the ironmongery from a catalogue.

• Frames: separately labelled and listed for the same rating, with anchors, grouting and wall-type limitations exactly as the listing states.
• Hinges: steel or stainless ball-bearing hinges, listed, quantity dictated by leaf height — three per leaf up to 90 inches is the normal starting point, more above that.
• Latching and exit devices: panic hardware on a fire door must be labelled Fire Exit Hardware and must not have a dogging feature, and electric strikes and electrified locks must be fail-secure.
• Glazing: fire-rated glass carries a code such as D-H-90 (D for door, H for hose stream, 90 for minutes). Vision panels in 45-, 60- and 90-minute doors are classically limited to 100 square inches (about 645 cm²) per light, and larger lights are only permitted where that glazing product is listed in that door at that size. In a hazardous location the glass must also meet CPSC 16 CFR 1201 Category II safety glazing.
• Lite kits and louvers: both must be listed for the door; louvers are not permitted in interior exit stairway doors or in smoke and draft control assemblies.
• Protective plates and pairs: kick and armour plates extending more than 16 inches (406 mm) above the bottom of the door need a specific listing, and coordinators, astragals and flush bolts must match the listing so a pair closes and latches in sequence.

Our note on fire-rated door hardware certification covers the hinge, closer and lock side in more depth. The full handover set is covered in our note on the fire and life-safety documents to collect for project handover.

What Is on the Label, and What Voids It?

The label is the document that travels with the door, and an inspector reads it before opening the submittal binder.

• What a listing label shows: the manufacturer, the listing agency’s mark and file number, the rating in hours or minutes, the temperature rise rating where one applies, the positive pressure category (A or B), and the S designation for smoke and draft control assemblies.
• Where it lives: on the hinge edge of the leaf and the rabbet of the frame, applied at a plant under the listing agency’s follow-up service; field labelling can only be done by that agency’s representative.
• Painting over it voids it: NFPA 80 requires labels to remain legible, and a painted, ground-off or removed label is treated as no label at all.
• Field modification limits (NFPA 80 Chapter 6): site-drilled holes for surface-applied hardware are limited to 1 inch (25.4 mm) diameter, cylinder holes excepted; the undercut may not exceed 3/4 inch (19 mm) above the floor covering; head and jamb clearance is nominally 1/8 inch (3.2 mm).
• Never done on site: cutting the leaf to fit an opening, adding a vision panel or louver outside the listing, welding on the frame, or fitting hardware that is not in the listed set.

Where Fire Door Packages Made in China Usually Fall Short

Chinese steel and timber door plants build very good fire doors, and a number hold current US listings. The failures are paperwork and assembly discipline, not steel.

• The wrong certificate: a CCCF certificate to GB 12955 — China’s own fire door scheme — or a report to ISO 834 or EN 1634-1, offered as a UL 10C listing. A GB 12955 Class A 1.50-hour door is not a listed 90-minute door in the US.
• Unlisted hardware: hinges, closers and locks chosen on price and fitted into a listed leaf. The listing defines the hardware set, so a substituted closer breaks it, and two labels from two listings do not make one listed assembly.
• Doors resized in the factory or on site: a listed door has a maximum tested size, and trimming a leaf to suit a site-measured opening voids the label.
• Vision panels drawn larger than the listing allows: a 6 inch by 30 inch narrow lite is roughly 180 square inches, well above the classic 100 square inch limit.
• Category B seal kits left out of the container: light, cheap, easy to forget, and without them the door is not rated.
• Labels applied by the factory itself: copied or self-applied labels are fraud, and the fastest way to have a container rejected.

Listings rather than catalogues are the first filter when we shortlist commercial door manufacturers in China.

What Should the Door Schedule and Purchase Order Say?

Most compliance disputes trace back to a door schedule that carried a rating and nothing else. Write it so each line can be quoted, built and inspected without a conversation.

• Per door line: opening number, wall rating and code reference, door rating in minutes, temperature rise requirement, smoke and draft control (S label) yes or no, leaf size and thickness, core type, frame profile and wall thickness, glazing type, size and marking, hardware set number, finish.
• Per order: “Assemblies listed and labelled to UL 10C or NFPA 252 (positive pressure) by an approved listing agency, installed to NFPA 80; door, frame, hardware and glazing supplied as one listed assembly; listing file numbers submitted before production.”
• Submittal gate: require listing documents and hardware schedules to be approved before steel is cut. A rating problem found at shop-drawing stage costs a drawing revision; found on site it costs a container.
• Sizes and loose items: state that no leaf may be trimmed and that any opening outside the tested size range is flagged before production; list seal kits, closers and coordinators as their own packing lines so they are checked at loading.

A plant’s own bench test is not a listing, a distinction we set out in factory test reports vs accredited lab testing, and it sits inside the wider map of fire rating standards for building materials and finishes.

Frames, hinges, closers and seals are part of the listed assembly — for sourcing the frame and ironmongery package itself, see our door frame and hardware sourcing page.

How FBM Sourcing Handles Fire Door Compliance on a US Package

FBM Sourcing manages the entire China procurement package for overseas construction projects. On a US hotel, apartment, school or healthcare package we start from the door schedule and the wall ratings, not the catalogue: every opening is sorted by rating, temperature rise and smoke and draft control, and each line matched to a plant holding a current listing for that construction, size and hardware set. Listing file numbers, hardware schedules and glazing markings are checked against the specification before the order is confirmed, and openings outside a tested size range are raised while they can still be redrawn. Before shipment our own FBM Sourcing QC team inspects the goods at the factory — label legibility and content, leaf and frame dimensions, glazing size and marking, hardware against the listed set, seal kits and loose items — with photo and video records before shipment. The listing documents travel with the shipping and customs document set. All quotations, invoices and shipping documents are issued by FBM Sourcing — you deal with us, and we carry the responsibility. For suppliers you nominate, we charge a 5% commission; for products we source for you, we quote a direct price. We ship by full container: sometimes the doors alone fill full containers; sometimes they are consolidated with the other product categories of the same project into a few containers — always full containers.

If you are specifying fire doors for a US commercial building, send us the door schedule, the hardware sets, the destination port and the required-on-site dates. Our team will review it opening by opening and set out a quotation — use the quote button above or WhatsApp +86 135 6007 5057.