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Tunnel Fire Resistant Decking Boards

Because tunnel is a closed place, the more combustible substances in the tunnel, the greater the fire risk, and after a fire, the higher the heat generated, the denser the smoke and poisonous gas, the longer the burning time, and the greater the harm to people!

Ⅰ. The importance of fire resistant decking boards in tunnels


Because tunnel is a closed place, the more combustible substances in the tunnel, the greater the fire risk, and after a fire, the higher the heat generated, the denser the smoke and poisonous gas, the longer the burning time, and the greater the harm to people!


In the early period, no tunnel fire resistant decking boards were used in tunnels, and the cement boards and lines were completely exposed, giving people a feeling of depression and messiness. When a driver drives a car at high speed from the bright field of vision outdoors and suddenly enters a dark environment, it takes a while for the eyes to adapt to the light. If you do not pay attention to slowing down, it is easy to cause a car accident. Similarly, when a vehicle leaves a dark tunnel, the eyes cannot adapt to the strong light outside the tunnel in a short time, which not only brings troubles to the drivers, but also poses a safety hazard.


In addition to fire risks, impaired visual effects and other factors, water seepage of the tunnel wall, if not controlled, will also lead to a humid tunnel environment, moldy walls, falling off of walls, giving a rise to more safety risks.


In order to improve the safety factor of tunnels and reduce the risk of fire, tunnel fire resistant decking boards are widely used in various tunnels.


Ⅱ. How to choose tunnel fire resistant decking boards?


The quality of the fire resistant materials and decoration materials used in the tunnel must be guaranteed. Not only do they need to have a decorative effect, but the fire resistant performance must also meet the relevant indicators. Then how should we choose a tunnel fire resistant decking board?


1. What is the fire rating of the board?


Different types of tunnel fire resistant decking boards should be selected for different kinds of tunnels so as to adapt to different situations.


2. What is the limit time of the building structure protected by the tunnel fire resistant decking boards?


The fire resistance limit in the tunnel cannot be less than 2 hours.


According to regulations, tunnel fire resistant decking boards are classified according to their performance levels: Class I tunnel fire resistant board (RABT heating curve) with the fire resistance of 3.83 hours; Class II tunnel resistant board (RABT heating curve) with the fire resistance of 3.3 hours; Class III tunnel resistant board (HC hydrocarbon Heating curve) with the fire resistance of 2 hours; Class IV tunnel resistant board (heating curve of "Building Construction Fire Resistance Test Method") with the fire resistance of 2 hours; Highway traffic tunnel fire resistant board (HC carbon hydrocarbon heating curve) with the fire resistance of 2 hours.


3. What type of material should be selected for fire resistant decking boards?

The market mainly uses non-asbestos calcium silicate board or reinforced fiber cement board as the base material, and sometimes steel metal composites are also used. The cost of the latter will be slightly higher.


4. How dense is the fire resistant decking board?

In order to facilitate the later maintenance, the density of the tunnel fire resistant decking boards used under normal circumstances is lower than 1.6g/cm³.

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