Promat constructions / applications > Fire doors
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Fire rated doors within tunnels are installed to provide a means of egress and to
prevent the spread of fire, hot gasses and smoke from the tunnel to the surrounding
compartments. Fire doors are installed:
• at cross connections between two tunnel tubes
• to provide access to an escape route (mid-tunnel-channel in an immersed tunnel)
• to protect people who have fled into safe havens
In view of the smoke emissions from vehicles, and the high toxicity of this smoke as a
result of the types of materials used in modern car manufacture, it is also imperative
that any door will provide a high degree of resistance to the passage of smoke, and
ideally, where used as access to safe havens, should provide a high degree of
thermal insulation to reduce the affects of heat on the occupants of the chambers.
Any fire door situated within a tunnel should be capable of providing the same degree
resistance to the aggressive and polluted environment as any other services.
In the design phase of a fire door it should be noted that the elongation of the steel
members will cause gaps around the perimeter of the door, potentially introducing
failure of the system. Apart from elongation the steel members will also tend to curve
as a result of single sided heating.
A tunnel fire door should be fire tested in two configurations:
1. The door blade and hanging system inside the furnace
2. The door blade and hanging system outside the furnace
Promat has designed a fire rated door applicable and suitable for tunnels and fire
tested according to the RWS standard. For ease of operation in an emergency
situation the door is designed as a sliding door which requires a minimum of force to
open the door. The door provides thermal insulation for the full duration of 2 hours
when exposed to the RWS fire development and remains its integrity as well.
The material used to provide insulation to the door blade is ROMATECT®- T. The
perimeter of the door blade, as well as some connections to the surrounding walls,
are sealed by means of the intumescent PROMASEAL®- PL strips.
