㻆-Minute Fire-Rated Door

1. What is a 70-minute fire-rated door?

A 70-minute fire-rated door is a steel door capable of restraining the spread of flames for 70 minutes in the event of a fire or explosion. This performance ensures that fire does not propagate to adjacent areas, thereby safeguarding human life and property. However, after 70 minutes of exposure to extreme heat, the door may deform and gradually lose its fire-resistance capability.

2. Common EI70 fire-rated door types at ADAMCO

In terms of classification, 70-minute fire-rated doors can be divided into two main types: single-leaf fire-rated doors and double-leaf fire-rated doors. Specifically:

• Single-leaf 70-minute fire-rated door:
  

This type of fire-rated door consists of only one door leaf.
With this characteristic, single-leaf 70-minute fire-rated doors are suitable for areas with limited space such as residential entrances, hotel room doors, and fire-rated doors in apartment buildings.
Due to having a single leaf, operation and daily use are simple and convenient.

• Double-leaf 70-minute fire-rated door:
  

In contrast, double-leaf fire-rated doors comprise two door leaves, providing wider access and more comfortable movement.
This type is commonly prioritized for installation in spacious areas with high pedestrian traffic, such as companies, enterprises, construction sites, and factories, where there is a higher risk of fire or proximity to emergency exits.
The use of double-leaf fire-rated doors significantly enhances overall fire safety efficiency.

• EI70 fire-rated steel door with vision glass:
  

Enhances natural lighting for interior spaces, creating a more open and comfortable environment.
The glass panel can be made of fire-resistant tempered glass, ensuring high safety standards and excellent fire-resistance performance.

3. Structure of the 70-minute fire-rated steel door

• Door leaf:
  

The two outer layers are fabricated from galvanized steel sheets with a thickness of approximately 0.7 mm, finished with an electrostatic powder coating to prevent corrosion and rust.

The core of the door leaf consists of fire-resistant materials made from honeycomb paper. Although this core does not directly resist fire, it helps limit thermal radiation from spreading through the door leaf. Common fire-resistant core materials include honeycomb paper or glass wool, depending on the door type.

The internal door frame structure is manufactured from U-shaped steel or hollow steel sections with dimensions of (30 x 30 x 2) mm. This structure enhances rigidity, preventing warping or deformation when exposed to high temperatures.

• Door frame:
  

The steel door frame is fabricated from cold-rolled galvanized steel with a thickness of 1.2 mm.

• Door coating:
  

The door surface is treated through a meticulous phosphating process to completely remove grease, rust, and impurities. This process ensures a durable, scratch-resistant finish and maintains long-term aesthetic quality.

The door is primarily finished in an electrostatic powder-coating chamber. A wide range of colors is available to suit different architectural styles and client requirements. For example, dark gray is commonly used for emergency exits, while wood-grain finishes are suitable for premium spaces, maintaining a natural and warm appearance while meeting fire-safety requirements.

• Accompanying components:

Hydraulic door closer: Reduces the effective door weight, enabling smooth and effortless opening and closing.

Fire-resistant sealing gasket: Designed to tightly seal the gap between the door leaf and the frame. When exposed to high temperatures during a fire, the gasket expands to form a barrier, preventing flames and smoke from penetrating through the door. It also ensures a tight and aesthetically pleasing closure during normal operation.

Fire-rated door hinges: Directly fixed to the door leaf and frame, manufactured from high-grade, corrosion-resistant steel.

In addition, the door system can be equipped with other accessories such as handles, locks, fire-resistant tempered glass, escape ladders, bottom door stoppers, panic bars, and other safety hardware.

4. Advantages of the 70-minute fire-rated door

ADAMCO’s 70-minute fire-rated steel doors are manufactured from premium materials on modern production lines, delivering significant benefits to end users. Below are the key advantages of ADAMCO’s fire-rated steel doors:

• Effective fire resistance:
  

Manufactured from high-quality anti-corrosion steel sheets with excellent fire-resistance properties, ADAMCO’s 70-minute fire-rated doors effectively inhibit the spread of fire. The products are rigorously tested and certified, ensuring optimal fire-resistance performance and maximum safety for people and assets in emergency situations.

• High aesthetic value:
  

ADAMCO’s fire-rated steel doors feature a refined and professional appearance with premium electrostatic powder coating. The doors are resistant to cracking, warping, and weather-related impacts, offering exceptional durability and long-lasting aesthetic appeal.

• Ease of maintenance:
  

Fire-rated steel doors require significantly less maintenance compared to wooden or aluminum-glass doors. Once installed, they operate smoothly and reliably over long periods without frequent servicing.

• Cost efficiency:
  

Cost and installation expenses are key considerations when ing fire-rated doors. With ADAMCO’s solutions, clients make a one-time investment and benefit from long-term durability without concerns over minor defects or recurring repair costs.
ADAMCO’s fire-rated doors not only deliver aesthetic value but also demonstrate outstanding functional performance over time, making them an ideal choice for modern and high-end construction projects.

5. Quotation for 70-minute fire-rated doors at ADAMCO

• Several factors may affect the quotation for 70-minute fire-rated doors, including:
  

• Door dimensions and quantity
  

• Materials and manufacturing technology
  

• Accessories and additional functional features
  

• Brand reputation and manufacturer credibility
  

• Compliance requirements with fire-safety standards and inspection certifications
  

• Transportation and installation costs

6. Reference prices for common EI70 fire-rated doors:

• Single-leaf 70-minute steel door (standard size 2.1 m x 0.8 m): VND 4,200,000 – 4,600,000.
  

• Double-leaf 70-minute steel door (standard size 2.1 m x 1.6 m): VND 8,400,000 – 9,200,000.
  

• Single-leaf 70-minute steel door with vision glass (standard size 2.1 m x 0.8 m): VND 4,800,000 – 5,200,000.
  

• Double-leaf 70-minute steel door with vision glass (standard size 2.1 m x 1.6 m): VND 9,600,000 – 10,400,000.

With extensive experience in industrial construction and fire-protection solutions, ADAMCO is particularly oriented toward serving FDI customers, including foreign-invested factories, industrial parks, export-processing zones, and international-standard projects. Our fire-rated door systems are designed and manufactured in strict compliance with Vietnamese PCCC regulations (TCVN) while meeting the technical specifications, documentation requirements, and quality expectations commonly applied in FDI projects, ensuring seamless approval, acceptance, and long-term operational reliability.

For detailed consultation, the most competitive quotation, and professional installation services, please contact ADAMCO today.