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June 25, 2025

How Is the Fire Rating of Movable Partition Walls Divided?

For decoration and design, movable partition walls are the most popular selection for public and commercial spaces due to their versatility as well as their ability to be reused. But, when selecting moving partition walls and considering their appearance, sound insulation and endurance, their fire rating is an important factor that should not be neglected. What are the fire ratings for partitions that move? Let's look at it more closely.

The basic ideas of the fire rating

The fire rating is the capability of a material or element to withstand the combustion process and to transfer heat into an event of the event of a. In accordance with international standards the fire rating is generally separated into classes A B1, Class B1, Class B2 as well as Class B3. For walls that can be moved the fire ratings are based on the building materials as well as the method of construction.

movable partition wall in conference room

Fire ratings are classified according to the classification of partition walls that can be moved

1.Class A wall that is fireproof Non-combustible building materials
Fireproof partition walls of Class A generally consist of non-combustible material like fiberglass, rock wool, and so on. These types of materials won't burn during a fire nor create harmful smoke, which is why they offer extremely high security in fire. Walls that are fireproof in Class A are commonly used in areas that have extreme fire protection needs like theatres, hospitals, schools as well as other places. They are constructed using multiple-layer or double-layer structures that are filled with non-combustible substances with a middle layer to guarantee that structural integrity as well as thermal insulation will be preserved over a prolonged period of time during the event of a incident of fire.

2.Class B1 partition walls that are fireproof The materials used for fire-proofing
Class B1 fireproof walls are made from flame-retardant material, like wooden panels that are fireproof, steel composite panels, and so on. These types of materials are difficult to heat in a fire The speed at which they burn is slow. Also, the gas emissions of toxic and smoke are comparatively smaller. Walls that are fireproof in Class B1 are ideal for areas with specific fire safety specifications for example, shops, offices or hotels. They can be constructed using the use of multi-layer and single layer structures using materials that contain flame retardants with a middle layer or sprayed by coatings that are fire resistant.

3.Class B2 as well as lower partition walls that are fireproof Combustible and flammable substances
Class B2 and above fireproof partition walls typically constructed from flammable or combustible substances, like regular wood and plastics. These types of materials are very easy to be burned in a flame as the speed of burning is quick, as they release a great deal of toxic gasses and smoke. Thus, the resistance to fire of B2-level and below partition walls is comparatively low. They are best suited for areas with no fire protection needs. In actual use for improving their resistance to fire the materials are typically coated with particular construction techniques.

Click here to view the related article: Introduction to Materials and Processing Technologies for Movable Partition Walls
What Special Considerations Are Needed in the Structural Design of Movable Partition Walls?


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