BX Bunka Fire rated steel door

What is a Fireproof Steel Door?

Nowadays, fireproof steel doors have become an essential part of all buildings, especially in high-density areas such as apartments, factories, and offices. Particularly after the **QCVN 06:2020** fire safety regulation was issued and clarified, modern fireproof steel doors must have the ability to prevent fire spread, maintain door integrity, and offer thermal insulation. Specifically, with **EI60 fireproof steel doors**, the door must be able to prevent flames and smoke from passing through, and the surface not exposed to flames should not exceed 180 degrees Celsius after 60 minutes.

Currently, fireproof steel doors are typically constructed with two-sided steel plates ranging from 0.7mm to 1.6mm in thickness, depending on the manufacturer. The core is filled with fireproof and insulating materials such as magnesium oxide, concrete, or rock wool. Additionally, accessories mounted on the doors are required to meet the corresponding fire resistance level of the door.

Filling the door with multiple materials results in increased door weight.

### Important Changes to Fireproof Steel Doors under **QCVN 06:2020**
The **QCVN 06:2020** regulation, issued in 2020, provides very specific and detailed requirements regarding fire containment and thermal insulation capabilities of fireproof doors, particularly prioritizing the thermal insulation aspect.

As a result, the internal structure of the door leaf and frame has undergone many changes compared to previous designs, with the core material transitioning from lightweight materials like honeycomb paper and rock wool to more heat-resistant materials like magnesium oxide and lightweight concrete.

This has significantly increased the weight of the door leaf, so accompanying accessories such as door closers, hinges, and locks must also have corresponding load-bearing capacity and durability.

### Applications of Fireproof Steel Doors
Fireproof doors can be installed in various parts of a building depending on the intended use. These doors are primarily used to prevent fire from spreading between different areas, so they are commonly installed at emergency exits, main entrances, and corridors.

Nowadays, some private homes also use fireproof steel doors for main entrances or bedroom doors to protect in case of external fires or fires from surrounding areas.

### Structure of a Fireproof Steel Door
Fireproof steel doors generally consist of the following components:

- **Door frame:** Made of steel with a thickness of 1.2 – 2mm, filled with magnesium oxide sheets inside.
- **Door leaf:** 50mm thick, with steel cladding 0.7-1.6 mm thick.
- **Smoke and fireproof rubber gaskets for thermal insulation**.
- **Door accessories:** Hinges, locks, door closers, door stoppers, sill plates, screws, etc.

### EI60 Fireproof Certification
Bunka fireproof steel doors, manufactured by **BX Bunka Vietnam Co., Ltd.**, are certified with **EI60 fire resistance** according to the latest **QCVN 06:2020** standards issued by the Ministry of Construction and the Fire Prevention Department.

**QCVN 06** specifies the fire resistance and insulation limits of fireproof materials at various locations to ensure safety during a fire. This means that these materials maintain their integrity and insulation even under direct exposure to flames, with fire resistance lasting up to 60 minutes.

### Manufactured by a Leading Japanese Corporation
BX Bunka fireproof steel doors are produced by **BX Bunka**, a leading Japanese corporation with over 60 years of experience in steel doors. Additionally, the door accessories are all imported from reputable Japanese brands.

### Airtightness, Fire Resistance, and Smoke Containment
BX Bunka fireproof steel doors are designed and manufactured with high precision and strict standards, offering excellent airtightness to ensure user safety and minimize damage in the event of a fire.

### Superior Durability
Constructed from high-quality components combined with advanced technology, BX Bunka fireproof steel doors have a longer lifespan compared to wooden doors. They are resistant to warping, termites, and rust, even in harsh environmental conditions, and are easy to maintain.

Moreover, BX Bunka fireproof steel doors feature a special design with reinforced steel at critical points. The accessories used are premium brands from around the world, ensuring the door can withstand hundreds of thousands of open-close cycles, even with the heavy, insulated fireproof steel door.

### Trusted Supplier of BX Bunka Fireproof Steel Doors
**Vholdings Company** is proud to be the exclusive distributor and installer of Bunka steel doors nationwide.

Contact: **ceo.vholdings@gmail.com**  
Website: **vholdings.com.vn**  
Hotline: **(+84) 867 098 021**