NFPA 80, Standard for Fire Doors and Other Opening Protectives, establishes the requirements for the installation, inspection, testing, and maintenance of fire door assemblies in commercial and institutional buildings. Every component in a fire door assembly—the door, frame, hinges, closing device, latching hardware, and glazing—must be listed and labeled by an approved testing laboratory, and the complete assembly must be maintained in accordance with NFPA 80 throughout its service life. This guide covers the key provisions of NFPA 80 that affect specification, procurement, and ongoing compliance of fire-rated door assemblies.
CDF Distributors supplies complete fire-rated door and frame assemblies with all required labels and listed hardware. You can configure fire-rated assemblies online using CDF’s ProBuilder tool at cdfdistributors.com. For assistance specifying an NFPA 80 compliant assembly for your project, call (855) 769-9895 or email sales@cdfdoors.com.
Scope and Purpose of NFPA 80
NFPA 80 applies to the installation, inspection, testing, and maintenance of assemblies and devices used to protect openings in walls, floors, and ceilings against the spread of fire and smoke. The standard covers fire doors, fire windows, fire dampers, and fabric fire safety curtains. For fire door assemblies specifically, NFPA 80 governs every phase of the assembly’s life cycle, from initial installation through annual inspections and any field modifications that may occur over time.
The standard does not establish where fire-rated assemblies are required. That determination is made by the applicable building code (such as the International Building Code) and enforced by the Authority Having Jurisdiction (AHJ). NFPA 80 defines how those assemblies must be constructed, installed, and maintained once the building code requires them.
Fire Door Assembly Components
A fire door assembly is a complete system, not a single product. Every component must be tested and listed together as part of an assembly that achieves a specific fire protection rating. The following table identifies the required components of a fire door assembly under NFPA 80.
Fire Door | The door leaf itself, constructed of materials (steel, wood, composite) tested to the required fire rating. Must bear a permanent label from an approved testing laboratory. |
Fire Door Frame | The steel or wood frame into which the door is installed. Must be listed and labeled for the same or higher fire rating as the door. |
Hinges | Must be steel, steel-base, or listed for fire door use. Spring hinges may serve as both hinge and closing device on certain ratings. |
Closing Device | A door closer, spring hinge set, or other approved device that returns the door to the fully closed position after each opening. |
Latching Hardware | A latch bolt that holds the door in the closed position. Required on all swinging fire doors unless specifically exempted. |
Glazing | Fire-rated glass or glazing material listed for use in fire doors, limited in size based on the door’s fire rating. |
Gasketing/Edge Seals | Intumescent or smoke seals as required by the listing or by the AHJ for smoke control. |
Coordinators | Required on pairs of fire doors to ensure the inactive leaf closes before the active leaf. |
Astragals | Overlapping or meeting edges on pairs of doors, required when specified by the listing. |
Fire Protection Rating Levels
NFPA 80 recognizes five fire protection rating levels for fire door assemblies. The required rating depends on the wall type and the fire resistance rating of the wall in which the opening is located. The following table summarizes all five rating levels and their typical wall applications.
Fire Protection Rating | Wall Fire Resistance Rating | Typical Application |
20-minute | 1-hour (with additional criteria) | Corridor walls, smoke partitions, and room separations where a reduced rating is permitted by code |
45-minute | 1-hour | Standard 1-hour corridor walls and room separations in most occupancy types |
60-minute (1-hour) | 1-hour or 2-hour (exit enclosures) | Exit access corridors with 1-hour walls, certain shaft enclosures, and exit enclosures up to 2-hour walls |
90-minute (1-1/2-hour) | 2-hour | Exit stairwell enclosures, 2-hour fire barriers, and 2-hour shaft walls |
180-minute (3-hour) | 3-hour or 4-hour | Fire walls, high-hazard separations, and occupancy separations with the highest fire resistance requirements |
The fire protection rating of a door assembly is always less than or equal to the fire resistance rating of the wall in which it is installed. For example, a 2-hour fire barrier wall typically requires a 90-minute fire door assembly. The specific ratio is determined by the building code and the table of opening protectives within that code.
Labeling Requirements
NFPA 80 requires that every component of a fire door assembly bear a permanent label from an approved testing laboratory (such as UL, Intertek/WHI, or ULC). Labels serve as the primary means of verifying that an assembly was manufactured and tested to the claimed fire protection rating. The following sections describe the labeling requirements for each major component.
Door Labels
Every fire-rated door must have a label permanently attached by the manufacturer. The label is typically a metal plate riveted or otherwise permanently affixed to the hinge edge of the door. The label identifies the testing laboratory, the manufacturer, the fire protection rating (in minutes), and a reference to the fire test standard (such as NFPA 252 or UL 10C). Removal, alteration, or painting over a fire door label is a code violation and may cause the door to fail inspection.
Frame Labels
Fire-rated frames must also bear a permanent label from an approved testing laboratory. The frame label is typically located on the hinge jamb, near the top of the frame. The frame’s fire protection rating must be equal to or greater than the door’s rating. A fire-rated door installed in a non-rated frame, or a door installed in a frame with a lower rating, is not a compliant assembly.
Hardware Labels
Fire-rated hardware (hinges, closers, locksets, exit devices, and flush bolts) must be listed for use on fire door assemblies. Hardware items carry their own listings, which are typically documented in the testing laboratory’s directory or product listing rather than as a physical label on the hardware itself. When inspecting an assembly, the inspector verifies that hardware is of an approved type for the rating level. Substituting non-listed hardware on a fire door assembly voids the assembly’s compliance.
Glazing Labels
Fire-rated glazing installed in fire doors must bear a permanent label identifying the testing laboratory, the fire protection rating, and whether the glazing meets hose stream test requirements. The glazing label is typically etched or printed in a corner of the glass. Glazing installed without a visible label may be rejected during inspection.
Annual Inspection Requirements (NFPA 80 Section 5.2)
NFPA 80 Section 5.2 requires that all fire door assemblies be inspected and tested annually. This is one of the most important and most frequently cited provisions of the standard. The building owner or designated representative is responsible for ensuring that inspections are performed and that deficiencies are corrected. The following table lists the specific inspection items required by NFPA 80 Section 5.2.
Labels | Verify that the fire door, frame, hinges, and glazing all bear legible labels from an approved testing laboratory. |
No Open Holes or Breaks | Check the door and frame surfaces for holes, breaks, or missing components that would compromise the fire barrier. |
Clearances | Measure the gap between the door and frame on all sides. Verify that clearances are within the tolerances specified by NFPA 80. |
Self-Closing | Operate the door and verify that it closes completely from any open position without manual assistance. |
Self-Latching | Verify that the latch bolt engages the strike plate fully each time the door closes. |
Door Condition | Check for damage, warping, or deterioration that would affect the door’s ability to resist fire. |
Frame Condition | Check the frame for damage, misalignment, or separation from the wall that would compromise the assembly. |
Gaskets and Edge Seals | Where required, verify that intumescent or smoke gaskets are present and intact. |
No Field Modifications | Verify that no unauthorized modifications have been made to the door, frame, or hardware. |
Coordinator Function (Pairs) | On paired fire doors, verify that the coordinator ensures the inactive leaf closes before the active leaf. |
Astragal Condition (Pairs) | On paired doors with astragals, verify the astragal is intact and allows proper door operation. |
No Blocking or Wedging | Verify that no door stop devices, wedges, or other objects prevent the door from closing and latching. |
Inspection records must be documented and made available to the AHJ upon request. Records should include the date of inspection, the name of the inspector, the location of each assembly inspected, and the findings for each inspection item. Deficiencies must be corrected without delay.
Flowchart or checklist graphic showing the NFPA 80 Section 5.2 annual inspection sequence: labels, holes/breaks, clearances, self-closing, self-latching, door condition, frame condition, gaskets, field modifications, coordinator/astragal (pairs), and blocking/wedging. This diagram requires CDF approval before inclusion in the production file.
Self-Closing and Self-Latching Requirements
NFPA 80 requires that all swinging fire doors be both self-closing and self-latching. These two requirements are among the most common points of failure found during annual inspections. A fire door that does not close and latch on its own provides no fire protection regardless of its rating.
Self-Closing
A fire door must be equipped with a closing device that returns the door to the fully closed position from any angle of opening. Acceptable closing devices include surface-mounted door closers, concealed closers, floor closers, and spring hinges. The closing device must overcome any latch resistance and any air pressure differential to close the door completely. A door that stops short of closing, even by a fraction of an inch, fails this requirement.
Hold-open devices are permitted only when connected to the building’s fire alarm system through a listed hold-open/release device. The device must release the door automatically upon activation of the fire alarm, a smoke detector, or loss of power to the hold-open device (fail-safe operation). Doorstops, wedges, and other non-listed hold-open devices are prohibited on fire doors under all circumstances.
Self-Latching
A fire door must have a latch bolt that engages the strike plate each time the door closes. The latch must project far enough into the strike to resist the positive pressure generated during a fire. Push/pull hardware, dummy trim, and passage-function locksets (those without a latch bolt) are not permitted on fire doors. The only exception is for fire doors in corridors of certain occupancies where the building code explicitly permits fire doors without positive latching, and even then only where confirmed by the AHJ.
Door Clearance Tolerances
NFPA 80 specifies maximum allowable clearances (gaps) between the door and the frame, and between the bottom of the door and the floor or threshold. Excessive clearances allow fire and smoke to pass through the assembly. Insufficient clearances prevent the door from closing and latching properly. The following table summarizes the clearance requirements.
Location | Maximum Clearance | Notes |
Door to frame (top and sides) | 1/8 inch (3.2 mm) | Standard maximum for steel doors and frames. Some listings allow up to 1/4 inch for specific assemblies. |
Meeting edges (pairs of doors) | 1/8 inch (3.2 mm) | Between the two door leaves at the meeting stile, unless a listed astragal or overlap is used. |
Bottom of door to floor/threshold | 3/4 inch (19 mm) | Maximum undercut permitted. Where required by the listing, a door bottom seal or threshold may reduce this further. |
Door to frame (wood doors) | 1/8 inch (3.2 mm) | Same as steel, though wood door listings may specify tighter tolerances for higher ratings. |
During annual inspections under NFPA 80 Section 5.2, inspectors measure clearances using a gap gauge. Doors with clearances exceeding these tolerances must be corrected. Common causes of excessive clearances include hinge wear, frame misalignment, door warping, and floor settling.
Glazing Limitations
NFPA 80 limits the type and amount of glazing (glass) that can be installed in fire door assemblies. The allowable glazing area varies by fire protection rating, and all glazing must be a listed fire-rated product. The following table summarizes the general glazing area limitations by rating level.
Fire Protection Rating | Maximum Glazing Area | Glazing Type Required |
20-minute | 1,296 sq in (per leaf) | Listed fire-rated glazing per the assembly listing |
45-minute | 100 sq in per light (unless using fire-resistive glazing) | Listed fire-protective or fire-resistive glazing |
60-minute | 100 sq in per light (unless using fire-resistive glazing) | Listed fire-protective or fire-resistive glazing |
90-minute | 100 sq in per light (unless using fire-resistive glazing) | Listed fire-protective or fire-resistive glazing |
180-minute (3-hour) | No glazing permitted in most listings | Not applicable for most 3-hour assemblies |
Fire-protective glazing (such as wired glass and certain ceramics) limits radiant heat transfer but does not eliminate it. Fire-resistive glazing (such as multi-laminate glass) blocks both flame and radiant heat, and can be used in larger sizes in certain listings. Glazing installed in fire doors must bear a permanent label from the testing laboratory. The maximum glazing area for any specific assembly is governed by the assembly’s listing, which may be more restrictive than the general NFPA 80 limits shown above.
Hardware Requirements by Rating Level
The hardware installed on a fire door assembly must be listed for the appropriate fire protection rating. Different rating levels have different hardware requirements. The following table summarizes the key hardware considerations for each of the five rating levels.
Fire Protection Rating | Hinges | Closer | Latch | Additional Requirements |
20-minute | Steel or steel-base; spring hinges may serve as closer | Required (spring hinges or surface/concealed closer) | Required unless code exemption applies | Typically permits the widest range of hardware options |
45-minute | Steel or steel-base; minimum 2 hinges per leaf | Required | Required | Standard commercial hardware is typically listed for 45-minute assemblies |
60-minute | Steel or steel-base; minimum 2 hinges (3 recommended for heavy doors) | Required | Required | Hardware must be verified against the specific assembly listing |
90-minute | Steel base required; minimum 3 hinges for standard-size doors | Required; must be UL listed for 90-minute use | Required; latch throw must meet listing | All hardware must match the 90-minute assembly listing exactly |
180-minute (3-hour) | Heavy-weight steel hinges; typically 3 or more per leaf | Required; heavy-duty closer listed for 3-hour use | Required; typically mortise lockset with substantial latch throw | Most restrictive requirements; no substitutions without re-listing |
Panic hardware (exit devices) may be used on fire doors provided the exit device is listed for fire door use (sometimes called "fire exit hardware"). Fire exit hardware must include a latch bolt that projects into the frame strike when the door is closed. Touch-bar and crossbar-type exit devices are both available in fire-rated versions. Rim-type and vertical-rod exit devices have specific listing requirements for fire door use.
Acceptable Field Modifications
NFPA 80 permits certain modifications to fire door assemblies in the field, provided the modifications conform to the original listing. Field modifications that fall outside the listing void the assembly’s fire rating. The following modifications are generally acceptable when performed in accordance with the manufacturer’s instructions and the assembly listing.
- Installing listed surface-applied hardware (closers, kick plates, protection plates) that is within the assembly’s listing
- Drilling new holes for listed hardware provided the modifications are within the parameters of the door manufacturer’s published field modification guidelines
- Undercutting a door (trimming the bottom) within the maximum clearance allowed by the listing, typically up to 3/4 inch
- Applying listed gasketing, seals, or intumescent material per the assembly listing
- Installing listed viewers (peepholes) that are tested as part of the assembly listing
- Refinishing a wood fire door per the manufacturer’s instructions (paint or stain)
- Replacing listed hardware with equivalent listed hardware of the same type and function
Any field modification must be documented. Modifications outside the listing require evaluation by the original testing laboratory through a field-applied label or engineering judgment service. CDF’s sales team can help verify whether a planned modification is within the listing for assemblies purchased through CDF.
Prohibited Modifications
The following modifications are prohibited under NFPA 80 because they compromise the fire-rated assembly’s tested performance. Performing any of these modifications voids the assembly’s fire protection rating and can result in code violations during inspection.
- Cutting new openings (vision lights, louvers) in a fire door without authorization from the testing laboratory through a field label service
- Removing or painting over fire door, frame, or glazing labels
- Installing non-listed hardware on a fire-rated assembly
- Removing the closing device or disabling its function
- Wedging, blocking, or propping open a fire door with non-listed devices
- Removing the latch bolt or replacing a latching lockset with passage-function hardware
- Installing non-rated glazing or replacing fire-rated glazing with standard glass
- Exceeding the maximum glazing area permitted by the assembly listing
- Modifying the frame in ways that affect its structural integrity or the door’s operation
- Filling holes in a fire door with non-listed repair materials
When a prohibited modification is discovered during inspection, the assembly must be corrected or replaced to restore compliance. The AHJ has the authority to require immediate correction of life safety deficiencies.
The Role of the Authority Having Jurisdiction (AHJ)
The Authority Having Jurisdiction is the organization, office, or individual responsible for enforcing the fire code and building code within a given jurisdiction. The AHJ plays a central role in NFPA 80 compliance at every stage of a fire door assembly’s life cycle.
During construction, the AHJ reviews plans and verifies that fire-rated assemblies are installed where required by the building code. During inspections, the AHJ can require proof that assemblies have been inspected annually per NFPA 80 Section 5.2 and that all deficiencies have been corrected. The AHJ also has the authority to approve alternative methods and materials, grant variances, and require repairs or replacements when assemblies are found to be non-compliant.
In healthcare facilities, the AHJ is often the Centers for Medicare and Medicaid Services (CMS) or its designated state survey agency. In commercial buildings, the AHJ is typically the local fire marshal or building official. Understanding who your AHJ is and what they require is essential for maintaining compliance with NFPA 80.
Plan Review | Verifies that fire-rated assemblies are specified where required by building code |
Initial Inspection | Confirms that installed assemblies match the approved plans and bear appropriate labels |
Annual Compliance | May require documentation of annual inspections per NFPA 80 Section 5.2 |
Deficiency Enforcement | Can issue citations, fines, or stop-work orders for non-compliant assemblies |
Variance Authority | Can approve alternative methods, materials, or configurations on a case-by-case basis |
Healthcare Facilities | CMS or state survey agency enforces NFPA 80 compliance as part of life safety surveys |
Common NFPA 80 Violations Found During Inspection
The following deficiencies are among the most frequently cited NFPA 80 violations during annual inspections and AHJ surveys. Awareness of these common failures can help building owners and facility managers prioritize maintenance and avoid compliance issues.
- Fire doors propped or wedged open without a listed hold-open device connected to the fire alarm system
- Missing, illegible, or painted-over labels on doors, frames, or glazing
- Doors that do not close and latch from any open position
- Excessive clearances (gaps) between the door and frame exceeding 1/8 inch
- Non-listed hardware installed on fire-rated assemblies
- Damaged or missing gaskets and intumescent seals
- Closer removed, disconnected, or improperly adjusted
- Unauthorized field-cut vision lights or louvers
- Pairs of doors with non-functioning coordinators
- Bottom of door exceeding 3/4-inch clearance to the floor
Configure a Fire-Rated Assembly
CDF’s ProBuilder tool allows contractors, facility managers, and design professionals to configure complete fire-rated door and frame assemblies online. During configuration, ProBuilder ensures that all selected components—door, frame, hinges, closer, lockset, and glazing—are compatible and appropriate for the specified fire protection rating. ProBuilder provides instant pricing and displays all relevant specifications.
For assistance specifying an NFPA 80 compliant assembly, call (855) 769-9895 or email sales@cdfdoors.com. CDF’s sales team is available Monday through Friday, 7:30 AM to 4:30 PM CT.
Frequently Asked Questions
How often do fire doors need to be inspected under NFPA 80?
NFPA 80 Section 5.2 requires that all fire door assemblies be inspected and tested not less than annually. The building owner or designated representative is responsible for ensuring inspections are completed and documented. Some jurisdictions and facility types (particularly healthcare) may require more frequent inspections.
What happens if a fire door label is missing or illegible?
A fire door without a legible label cannot be verified as a rated assembly and will fail inspection. In some cases, the original testing laboratory can issue a field-applied replacement label after verifying the door’s construction. Contact the door manufacturer or the testing laboratory to determine if a replacement label can be obtained. If the label cannot be replaced, the door may need to be replaced entirely.
Can I install a window or vision light in an existing fire door?
Cutting a new opening in a fire door requires authorization from the original testing laboratory through a field modification or field label service. The glazing must be a listed fire-rated product, and the opening must not exceed the maximum size permitted by the assembly listing. Cutting a vision light without this authorization voids the door’s fire rating.
What is the maximum gap allowed between a fire door and its frame?
NFPA 80 specifies a maximum clearance of 1/8 inch (3.2 mm) between the door and the frame on the top and sides for most fire door assemblies. The maximum clearance at the bottom of the door is 3/4 inch (19 mm) to the floor or threshold. Clearances exceeding these limits are a common inspection failure and must be corrected.
Are hold-open devices allowed on fire doors?
Yes, but only if the hold-open device is listed and connected to the building’s fire alarm system. The device must release the door automatically upon fire alarm activation, smoke detector activation, or loss of power (fail-safe). Doorstops, wedges, kick-down holders, and other non-listed hold-open methods are prohibited on fire doors under all circumstances.
Do all fire doors need a closer and a latch?
Yes. NFPA 80 requires that all swinging fire doors be equipped with a self-closing device and a self-latching device. The door must close and latch from any open position without manual assistance. There are very limited code exceptions for latching in certain corridor applications, but these exceptions require specific AHJ approval.
What is the difference between fire-protective and fire-resistive glazing?
Fire-protective glazing (such as wired glass and certain ceramic products) prevents the passage of flame but allows radiant heat to transfer through the glass. It is limited to 100 square inches per light in doors rated 45 minutes and above. Fire-resistive glazing (such as multi-laminate glass products) blocks both flame and radiant heat. Fire-resistive glazing can be used in larger sizes where the assembly listing permits, making it suitable for full-lite and half-lite fire-rated doors in certain applications.
Who is responsible for fire door maintenance and inspections?
The building owner is responsible for ensuring that fire door assemblies are maintained in proper operating condition and inspected annually per NFPA 80. The owner may delegate the inspection to qualified staff or a third-party inspection service, but the responsibility for compliance remains with the owner. Inspection records must be retained and made available to the AHJ upon request.
About This Guide
This reference guide is published by CDF Distributors to support building owners, facility managers, contractors, and design professionals in understanding the key requirements of NFPA 80 as they apply to fire door assemblies. CDF fabricates and supplies complete fire-rated door and frame assemblies from its Nashville, Tennessee headquarters, with all required labels and listed hardware included. CDF’s experience supplying NFPA 80 compliant assemblies to commercial, healthcare, and institutional projects nationwide informs the guidance in this document.
This guide is intended for general informational purposes and does not replace the full text of NFPA 80 or the applicable building code. Always verify specific requirements with the current edition of NFPA 80, your project specifications, and the Authority Having Jurisdiction. For questions about fire-rated assemblies or to configure an order, contact CDF at (855) 769-9895 or sales@cdfdoors.com. Configure your assembly online at cdfdistributors.com using ProBuilder.
