---
title: Fire Door Q&A - LSS Life Safety Services®
description: Answers to frequently asked questions about fire doors and fire door inspections.
image: https://info.lifesafetyservices.com/hubfs/Imported_Blog_Media/Gap20Allowances20for20fire20doors-987133-edited-4.jpg
---

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# Fire Door Q&A - LSS Life Safety Services®

** Apr 24, 2015 10:00:00 AM / by [LSS](https://info.lifesafetyservices.com/author/lss)

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- **What is a Fire Door?** 
    - A fire door, like a fire damper, is a method of passive fire protection used to prevent the spread of fire and smoke between fire barriers.

 

- **What are the main purposes of a fire door?** 
    - Serve as a regular door;
    - Provide ready egress during a fire;
    - Keep fire from spreading throughout a building;
    - Protect life and property

 

- **What determines a fire doors rating?** 
    - The fire rating of the wall that the door is installed determines the fire rating of the door.

 

- **What are typical wall rating / door rating usages?**

 

| **Wall Rating** | **Door Rating** | **Description and Use** |
| --- | --- | --- |
| 4 Hour | 3 Hour | These opening are in walls that separate building or divide a single building into designated fire areas. |
| 2 Hour | 1-1/2 Hour | Openings of this type are used in enclosures of vertical communication or egress through buildings. Examples of these types include stairwells and elevator shafts |
| 1 Hour | 1 Hour | These door assemblies divide occupancies in a building. |
| 1 Hour | 1/4 Hour | For use where there are openings in corridors or room partitions. |
| 2 Hour | 1-1/2 Hour | This openings is in a wall where there is the potential for severe fire exposure from the exterior of the building. |
| 1 Hour | 1/4 Hour | This opening is in an exterior wall that has the potential to be exposed to moderate to light fire from the exterior of the building. |
| 1 Hour | 1/3 Hour | These openings are in corridors where smoke and draft control is required. The minimum opening is 1 Hour. |

 

- **When are fire doors needed?** 
    - Where a door leads to exit stairwells and horizontal exits.
    - Where a door leads to a hazardous area.
    - Where a door has an Exit sign around it.
    - Generally, where a door leads to a hallway or from one fully enclosed room to another.

 

### **Fire Door Inspection Codes**

- **NFPA 80 Section 5.2.4.2 States – As a minimum the following items shall be verified** 
    - No open holes or breaks exist in surfaces of either the door or frame;
    - Glazing, vision light frames, and glazing beads are intact and securely fastened in place, if so equipped;
    - The door, frame, hinges, hardware, and noncombustible threshold are secured, aligned, and in working order with no visible signs of damage;
    - No parts are missing or broken;
    - Door clearances at the door edge to the frame, or the pull side of the door, do not exceed clearance listed (undercut ¾”, between door and frame 1/8” +/- 1/16” for steel doors, between door and frame 1/8” for wood doors, clearance for meeting edges of pairs of doors 1/8” for steel +/- 1/16”, and 1/8” for pairs of wood doors);
    - The self-closing device is operational, that is, the active door completely closes when operated from the full open position;
    - Auxiliary hardware items that interfere or prohibit operation are not installed on the door or frame;
    - No field modifications to the door assembly have been performed that void the label;
    - Gasketing and edge seals, where equipped, where required, are inspected to verify their presence and integrity.

 

#### Written by [LSS](https://info.lifesafetyservices.com/author/lss)

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