What is a fire rated door?

A fire rated door is a specially designed and tested door system that prevents flames, smoke, and heat from spreading for a set period during a fire. It is an important fire safety barrier. Our fire rated doors use high-quality fire-resistant core materials and sealing systems, offering up to 3 hours of fire performance and complying with standards such as GB, WH, UL, and EN.

How to choose a fire rating?

The right fire rating depends on local building codes, door location, and building type. • Escape routes and stairwells usually require 60–90 minutes • High-risk areas may require 120–180 minutes • Normal partitions may use 30–60 minutes • We can review your project and recommend the right option within 24 hours.

Can fire doors have glass?

Yes. We support fire rated doors with fire-rated glass vision panels. • Steel and wood doors: Larger glass inserts available • Aluminum doors: Larger glass areas for modern spaces • Louvered doors: Can combine louvers and glass

Do you offer custom sizes?

Yes. We support both single-door and large-batch customized sizes. • Width, height, and thickness can be customized • Single doors, double doors, unequal leaf doors, and special-shaped doors are available • Different wall thicknesses can be matched

Where are fire doors required?

Fire rated doors are usually required in: • Fire compartment boundaries, stairwells, and evacuation routes • Hospitals, hotels, schools, shopping centers, and offices • Factories, plant rooms, underground garages, and high-rise residential buildings • Any area where fire must be kept away from escape routes or important property

Fire Resistant Door Manufacturer

Leading Chinese manufacturer of steel, wood, aluminum and stainless steel fire doors. Certified by GB / WH / UL / CE / EN. Up to 3-hour fire resistance. Custom sizes from 1 to thousands of units.

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Home / Metal Fire Rated & General Doors / Fire Resistant Doors

What Are Fire Rated Doors and Why They Matter

Fire Rated Doors are specially designed and tested door systems that can stop flames, heat, and smoke for a certain time during a fire. They are a key part of passive fire protection and help protect both people and property.

The Core Function of Fire Doors

During a fire, fire rated doors help keep the fire in one area and block smoke and heat, giving more time for evacuation and rescue. More than 80% of fire-related deaths are caused by smoke inhalation rather than flames.

Composition of a Fire Door System

Door Leaf: Fire-resistant core materials and panels
Door Frame: Fire-rated structural support
Hardware: Fire-rated closers, hinges, seals, and accessories

Only a complete tested system can achieve the required fire rating.

Main Application Areas

Fire rated doors are widely used in: Escape Routes; Corridors and stairwells; Plant Rooms; High-rise buildings, hospitals, schools, shopping malls, hotels, and other densely populated areas.

Why Are Fire Doors So Crucial?

Fire rated doors are mandatory in commercial, industrial, and residential buildings. They are non-negotiable for protecting lives and property.

Block flames and smoke

Slow fire spread and gain escape time

Protect human life during a fire

A key safety barrier in public buildings

Reduce property loss

Limit fire damage to a single localized area

Comply with standards

Meet GB / EN / UL / BS / AS and other regulations

Improve building safety

A basic feature of modern fire protection

Explore Fire Rated Doors by Category

Find the perfect fire door for your project.

Get a Quote

Fire Doors by Fire Rating Time

Fire doors are classified by Refractory Time (Fire Resistance Rating) — the minimum duration a complete door system (leaf + frame + hardware) maintains fire resistance under standard test conditions. This key indicator directly affects fire compartmentation and building evacuation time.

• Provides basic fire and smoke protection for 30 minutes.
• Suitable for low-risk areas such as residential entrance doors, internal partitions, and corridor doors.

30 Minutes (EI30 / Class C / Low Level)

• Maintains fire integrity and insulation for 60 minutes.
• Commonly used in corridors, stairwells, residential escape routes, schools, and hospitals.
• Often regarded as a standard level in many codes.

60 Minutes (EI60 / Class B / Medium Level)

• Used in higher-risk areas and stricter projects.
• Suitable for high-rise fire compartments, plant rooms, fire wall openings, hotel lobbies, and major escape routes.

90 Minutes (EI90 / Class A / High Level)

• 120 minutes: For data centers, factories, and chemical facilities.
• 180 minutes (3 hours): For super high-rise buildings, key public buildings, and high-risk separations.
• Zhuohong can provide up to 3 hours (180 minutes) of fire resistance.

Higher Ratings (120 Minutes / EI120, 180 Minutes / 3 Hours)

Fire Doors by Material

Zhuohong offers four main types of fire rated doors. All are complete systems (door leaf + frame + hardware) and are strictly tested.

• Material characteristics: Made with aluminum alloy framing, fire-resistant infill, and optional fire-rated glass.
• Fire performance: Usually 60–90 minutes (EI60/EI90).

Aluminum Fire Doors

• Material characteristics: Made from galvanized steel or hot-rolled steel with fire-resistant core materials and anti-corrosion coating.
• Fire performance: Up to 3 hours (180 minutes). Steel is the most common material for the highest fire ratings.

Steel Fire Doors

• Material characteristics: Made with fire-treated timber or composite wood panels and fire-resistant core materials.
• Fire performance: Usually 30–90 minutes.

Wood Fire Doors

• Material characteristics: Made from 304-grade or higher stainless steel with different surface finishes and fire-resistant core materials.
• Fire performance: Usually 90–180 minutes, depending on design.

Stainless Steel Fire Doors

Material Comparison Summary

Material	Maximum Common Fire Rating	Weight	Corrosion Resistance	Appearance Style	Cost	Best Application Scenarios
Steel	180 minutes	Heavy	Moderate	Industrial / Modern	Medium	Industrial, commercial, high-risk areas
Aluminum	90 minutes	Light	Excellent	Modern and clean	Lower	Commercial, lightweight projects
Stainless Steel	180 minutes	Heavy	Excellent	Premium	Higher	Hospitals, coastal areas, clean environments
Wood	90 minutes	Medium	Poorer	Warm and natural	Medium to high	Residential, hotels, offices

Fire Doors by Function

Common functional types include Non-Insulated and Sound Insulation Fire Doors, which can be combined with fire resistance time (EI rating) or material to help architects and owners select the right option.

• Core feature: Mainly meet fire integrity (E) requirements, stopping flames and smoke for a set time, but without strict insulation performance.

• Fire performance: Usually 30 minutes, 60 minutes, or above.

• Note: Common in areas where integrity matters more than temperature control.

Non-Insulated Fire Doors

• Core feature: Combine fire resistance with sound insulation through special core materials and seals.

• Fire performance: Usually EI30 to EI90 or above with added acoustic performance.

Sound Insulation Fire Doors

Functional Comparison Summary

Functional Type	Main Fire Requirement	Additional Function	Typical Application	Recommended Zhuohong Example
Non-Insulated	Integrity (E) only	No insulation	Plant rooms, auxiliary openings, warehouses	EI30–EI90
Sound Insulation	EI30–EI90 or higher	Sound insulation (Rw/STC)	Hospitals, hotels, offices, schools	EI60 + acoustic rating
Insulated	Integrity + insulation (EI)	Temperature control	Escape routes, corridors, stairwells	EI60 / EI90

Fire Doors by Configuration

Fire doors are classified according to their configuration, mainly based on their opening method, structural form, and applicable opening size.

• Core feature: One door leaf in a single frame, usually as a swinging door.

• Common combinations: Available with different fire ratings and optional sound insulation.

Single Leaf Fire Doors

• Core feature: Two door leaves, with one active leaf and one inactive leaf. Both must close and seal properly during a fire.

Double Leaf Fire Doors

• Core feature: Made of interlocking slats that roll up when open and close automatically in a fire.

Rolling Fire Doors / Fire Shutters

Fire Doors with Glazing Options

Fire doors with integrated glass refer to fire doors that incorporate fire-rated glass, providing fire protection while allowing natural lighting, visual transparency, and enhancing the building's aesthetics.

• Core feature: Standard fire doors with small or medium glass openings for visibility.

• Fire performance: Commonly 30, 60, or 90 minutes.

Glazed Fire Doors

• Maximizes natural light, enhancing the sense of space and wayfinding;

• Features a modern, elegant aesthetic suitable for high-end architecture;

• Incorporates transparent or translucent glass to elevate the building's aesthetics.

Glazed Fire Doors

Fire Doors by Application

Fire rated doors are widely used in escape routes, corridors, stairwells, plant rooms, high‑rise buildings, hospitals, schools, hotels, malls, and public buildings.

• Core feature: Used in homes and apartments, focusing on safety, appearance, and cost balance.

• Typical requirements:
Entrance doors usually require 20–60 minutes
May need to be self-closing and positive latching

Residential Fire Doors

• Core feature: Designed for high-risk kitchen areas with good smoke control and fire resistance.

• Typical requirements:
Commercial kitchens often need 60 minutes or more
Residential kitchens may use 20–60 minute doors

Kitchen Fire Doors

• Core feature: Used between garages and living or work spaces to stop fire spread.

• Typical requirements:
Often require a 20-minute fire rating
Must be self-closing

Garage Fire Doors

• Core feature: Used on escape routes and exits, combining fire protection with fast evacuation.

• Typical requirements:
- Usually 30–90 minutes or above
- Must use Fire Exit Hardware or Panic Hardware
- Must open in the direction of egress

Emergency Exit Fire Doors

Application Comparison Summary

Application	Typical Fire Rating	Key Requirement	Recommended Material	Main Risk Control Focus
Residential	20–60 minutes	Self-closing, appearance	Steel, wood	Living unit separation
Kitchen	30–90 minutes	Smoke control, grease resistance	Stainless steel, steel	Fire and smoke control
Garage	20 minutes	Self-closing, durability	Steel	Prevent spread to building
Emergency Exit	30–90 minutes+	Panic / Fire Exit Hardware	Steel	Fast evacuation and separation

Key Technical Features of Fire Rated Doors

Engineered for performance — every layer and component is designed to maintain integrity under extreme conditions.

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Door Leaf Materials and Core Structure

1. Common Door Leaf Materials
The most common material is cold-rolled galvanized steel sheet, usually 0.8 mm to 2.0 mm thick. It is treated for corrosion resistance and smooth finish. Steel offers high strength, impact resistance, and non-combustibility. Aluminum alloy and stainless steel are also used, but steel is still the main choice for higher fire ratings.

2. Core Structure
The core structure includes steel reinforcements and infill materials, which affect fire resistance, insulation, and sound performance.
2.1 Reinforcement Structure: Steel stiffeners are usually spaced at about 150 mm to support the door structure and help it achieve high fire ratings.
2.2 Infill Materials: Rock wool, mineral wool, calcium silicate board, perlite, and vermiculite are common fire-resistant core materials.
2.3 Optional Insulation Layer: An extra insulation layer can help keep the non-fire side temperature lower, making the door suitable for stairwells and escape routes.

3. Typical Door Leaf Cross-Section
A standard door leaf usually includes outer panel, edge seal, internal steel reinforcement, fire-resistant core, optional insulation layer, inner panel, and intumescent seal groove. Thickness is usually 45–55 mm.

4. Why the Core Structure Matters
The core structure directly affects fire rating, structural stability, sound insulation, and thermal performance. The door leaf must always be part of a complete tested and certified system.
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Surface Finish and Corrosion Protection

1. Main Surface Finish Process
Powder coating is the main premium surface treatment for fire rated doors. It creates a durable coating after high-temperature curing.

1.1 Core Advantages of Powder Coating
- Strong performance: Good adhesion, corrosion resistance, and weather resistance
- Eco-friendly: Low VOC and efficient production
- Flexible appearance: Available in many colors and textures

1.2 Process Flow and Features
Typical process: degreasing → phosphating / nano-treatment → washing → powder spraying → curing.

2. Color System (RAL)
The RAL color system is widely used for standard and custom colors.
- Common colors: White (RAL 9010 / 9016), grey (RAL 7035 / 7040), black (RAL 9005)
- Customization support: Standard RAL and custom color matching are available

3. Corrosion Protection System
The steel base material is usually hot-dip galvanized steel or electro-galvanized steel, with zinc coating from Z80 to Z275.
A common protection system includes:
1. Base material: Galvanized steel
2. Pretreatment: Degreasing and phosphating
3. Primer layer (optional)
4. Powder coating: 60–80 μm thick
5. Edge treatment: Extra protection at folded edges

4. Corrosion Resistance Performance
- Indoor environments: Over 20 years of rust-free performance
- Coastal or humid environments: Higher zinc coating, thicker powder coating, or stainless steel is recommended
- Testing: NSS can reach 500–1000 hours or more without rusting

Zhuohong Surface Finish and Corrosion Protection Advantages
- Powder coating with RAL color customization
- High-zinc galvanized steel + multi-layer pretreatment
- 30,700 m² factory with stable and traceable production
- Different protection grades for indoor, coastal, and humid environments
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Hardware and Accessories Compatibility

Why is compatibility so important — Highest safety for all requirements?

• A fire rated door is a complete door assembly

• Incompatible hardware can cause self-closing failure, latch failure, deformation, and smoke leakage

• Standards such as NFPA 80 and UL require approved hardware

Core Hardware Components

Hardware Type	Main Function	Key Fire Requirement	Compatibility Consideration	Zhuohong Recommended Feature
Hinges	Support door weight and alignment	Steel / stainless steel, compliant with standards	Must match door weight, thickness, and rating	Heavy-duty stainless steel
Lock	Reliable latching and smoke control	High-temperature resistance	Must match door thickness and strike plate	Fire-rated mortise lock
Closer	Automatic closing and latching	Fire-rated closer standard	Must match door weight and seals	Hydraulic adjustment
Panic Bar	Fast emergency escape	Fire and exit hardware standards	Must work with closer	Low push force

Applications of Fire Rated Doors Across Industries

Every industry has unique fire safety requirements. Our doors are engineered to meet diverse building codes and operational needs.

Commercial Buildings

General requirements and Zhuohong solutions for commercial buildings

• Fire rating: Usually about 75% of the wall rating
• Core performance: Self-closing, positive latching, and complete system certification
• Maintenance: At least one inspection per year
Industrial Facilities

General requirements for industrial fire doors

• Fire rating: Usually around 75% of the fire wall rating
• Core performance: Self-closing, positive latching, and complete system certification
• Strong durability and impact resistance are important
Residential Buildings

• Apartment entrance doors: Usually 20 minutes
• Garage connecting doors: At least 20 minutes with self-closing
• Public corridor doors: Usually 30–60 minutes
• Stairwell and smoke lobby doors: Usually 60–90 minutes

Commercial Buildings
Industrial Facilities
Residential Buildings

Certified Manufacturing and Quality Control

A fire door is only as good as its hardware. All components are tested and certified as part of the complete door system

Production and Inspection Process

Raw Material Procurement and Inspection

Main materials include galvanized steel, stainless steel, aluminum alloy, rock wool, calcium silicate board, certified fire-rated hardware, fire-rated glass, intumescent seals, and powder coatings.

All incoming materials are strictly inspected before production.

Production and Assembly Process

Controlled workshop production (standardized lines)
• Cutting and forming: CNC cutting and bending
• Structural fabrication: Reinforcement and fire-resistant filling
• Assembly: Welding or mechanical interlocking
• Surface finish: Phosphating, powder coating, curing
• Hardware installation: Certified hardware and fire-rated glass installation
• Adjustment & testing: Smooth operation & tight closing

Inspection and Testing

• In-process inspection: Dimensions, infill, and coating are checked

• Final inspection: 100% inspection for appearance, size, and function

• Labeling and dispatch: Permanent fire label, documents, and protective packaging

Project Support and Delivery Capability

Pre-Project Support

• Technical solutions: Project-based engineering support
• Sample confirmation: Help with material, hardware, and finish selection
• Specification review: Check drawings and standards
• Technical support: Drawings and BIM models available

Project Execution and Delivery

• Production: Small to large orders
• Lead time: Standard 15–30d / Custom 25–45d
• Supply: Strategic reserves + multi-suppliers
• Logistics: Protective packaging, global shipping, DDP
• Tracking: Dedicated PM

Installation and On-Site Support

• Installation support: Detailed manuals, step-by-step videos, and optional on-site or remote training for your team

• Fast response: On‑site technical issues acknowledged within 24 hours and resolved within 48 hours (global coverage)

Quality Assurance and After-Sales Service

• Complete certifications: International certifications (EN, UL, GB) and strict in-house & third-party inspection

• Service commitment: Comprehensive warranty, lifetime technical support, and dedicated follow-up service

Custom Fire Door Solutions for Your Project

We are a leading fire rated door manufacturer in China, offering one-stop customized fire door solutions for global projects. We can tailor materials, design, and functions to fit your needs and comply with local and international standards.

How do we provide solutions for your project?

Requirement discussion

You provide drawings, fire rating needs, and style preferences

Professional design

3D renderings and technical confirmation

Precision manufacturing

Strict quality-controlled production

Fast delivery

Global shipping support

Technical support

Installation guidance and after-sales follow-up

Customization Options

• Door material and type

- Steel
- Wood
- Louvered
- Aluminum alloy
- Mixed materials

• Size and structural customization

- Non-standard sizes supported
- Single leaf, double leaf, unequal leaf, and special-shaped doors
- Door thickness from 40–70 mm

• Surface finish and color

- Powder coating, wood grain transfer, brushed finish, fluorocarbon coating
- Pantone / RAL color matching
- Different wood and aluminum finishes available

• Hardware options

- Locks, hinges, closers, seals, thresholds, panic bars, and more
- Premium brands such as DORMA and GEZE supported

• Design styles and solutions

- Modern, European, Chinese, industrial, and other styles
- 3D previews and technical proposals within 24 hours

• Special function customization

- Vision panels, louvers, acoustic insulation, thermal insulation, and burglar resistance

Optional Features

• Enhanced fire safety

- 1 to 3 hours fire ratings
- Fire-rated vision panels

• Functional upgrades

- Acoustic and thermal insulation
- Eco-friendly core materials and coatings

• Durability and strength

- Thicker steel sheets and anti-corrosion treatments

• Aesthetics and decoration

- Concealed hinges, LED strips, custom handles, and decorative panels

• Installation and maintenance

- Pre-embedded accessories and maintenance guidance

FAQ About Fire Rated Doors

Quick answers to the most common questions about fire resistant doors and our manufacturing capabilities.

Q What is a fire rated door?

A A fire rated door is a specially designed and tested door system that prevents flames, smoke, and heat from spreading for a set period during a fire. It is an important fire safety barrier. Our fire rated doors use high-quality fire-resistant core materials and sealing systems, offering up to 3 hours of fire performance and complying with standards such as GB, WH, UL, and EN.
Q How to choose a fire rating?

A
The right fire rating depends on local building codes, door location, and building type.

• Escape routes and stairwells usually require 60–90 minutes

• High-risk areas may require 120–180 minutes

• Normal partitions may use 30–60 minutes

• We can review your project and recommend the right option within 24 hours.
Q Can fire doors have glass?

A
Yes. We support fire rated doors with fire-rated glass vision panels.

• Steel and wood doors: Larger glass inserts available

• Aluminum doors: Larger glass areas for modern spaces

• Louvered doors: Can combine louvers and glass
Q Do you offer custom sizes?

A
Yes. We support both single-door and large-batch customized sizes.

• Width, height, and thickness can be customized

• Single doors, double doors, unequal leaf doors, and special-shaped doors are available

• Different wall thicknesses can be matched
Q Where are fire doors required?

A
Fire rated doors are usually required in:

• Fire compartment boundaries, stairwells, and evacuation routes

• Hospitals, hotels, schools, shopping centers, and offices

• Factories, plant rooms, underground garages, and high-rise residential buildings

• Any area where fire must be kept away from escape routes or important property

Request a Quote for Your Fire Door Project

We provide professional quotation service for fire door projects worldwide. Whether your project is a hotel, hospital, school, shopping mall, commercial complex, or industrial plant, simply send us your requirements and our team will provide an accurate and competitive quotation within 24 hours.

Fire Resistant Door Manufacturer

What Are Fire Rated Doors and Why They Matter

The Core Function of Fire Doors

Composition of a Fire Door System

Main Application Areas

Why Are Fire Doors So Crucial?

Block flames and smoke

Protect human life during a fire

Reduce property loss

Comply with standards

Improve building safety

Explore Fire Rated Doors by Category

Fire Doors by Fire Rating Time

30 Minutes (EI30 / Class C / Low Level)

60 Minutes (EI60 / Class B / Medium Level)

90 Minutes (EI90 / Class A / High Level)

Higher Ratings (120 Minutes / EI120, 180 Minutes / 3 Hours)

Fire Doors by Material

Aluminum Fire Doors

Steel Fire Doors

Wood Fire Doors

Stainless Steel Fire Doors

Material Comparison Summary

Fire Doors by Function

Non-Insulated Fire Doors

Sound Insulation Fire Doors

Functional Comparison Summary

Fire Doors by Configuration

Single Leaf Fire Doors

Double Leaf Fire Doors

Rolling Fire Doors / Fire Shutters

Fire Doors with Glazing Options

Glazed Fire Doors

Glazed Fire Doors

Fire Doors by Application

Residential Fire Doors

Kitchen Fire Doors

Garage Fire Doors

Emergency Exit Fire Doors

Application Comparison Summary

Key Technical Features of Fire Rated Doors

Core Hardware Components

Applications of Fire Rated Doors Across Industries

Certified Manufacturing and Quality Control

Production and Inspection Process

Raw Material Procurement and Inspection

Production and Assembly Process

Inspection and Testing

Project Support and Delivery Capability

Pre-Project Support

Project Execution and Delivery

Installation and On-Site Support

Quality Assurance and After-Sales Service

Custom Fire Door Solutions for Your Project

Requirement discussion

Professional design

Precision manufacturing

Fast delivery

Technical support

Customization Options

• Door material and type

• Size and structural customization

• Surface finish and color

• Hardware options

• Design styles and solutions

• Special function customization

Optional Features

• Enhanced fire safety

• Functional upgrades

• Durability and strength

• Aesthetics and decoration

• Installation and maintenance

FAQ About Fire Rated Doors

Q What is a fire rated door?

Q How to choose a fire rating?

Q Can fire doors have glass?

Q Do you offer custom sizes?

Q Where are fire doors required?

Request a Quote for Your Fire Door Project

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