Düker GmbH

Fire resistance of ceilings and walls

Ceilings and walls are classified as per EN 13501-2:

R    load bearing capacity

(capacity to withstand fire exposure on one or both sides without losing the structural ability)

E    integrity

(capacity to remain intact in case of fire exposure on one side so fire and hot gas do not penetrate to the other side)

I     insulation

(capacity to maintain a non-critical temperature on the unexposed side of the building element)

A ceiling or wall fulfilling all these criteria for e.g. 30 minutes will be classified REI 30.

The minimum fire resistance of ceilings and walls is defined by national or regional authorities. Mostly it will depend on the type of the building. Typical requirements in Europe would be REI 30, REI 90 and REI 120.




Fire resistance of pipe penetrations

Pipe penetrations through fire-rated walls or ceilings must have at least the same rating duration as the wall or ceiling.

As the "R" criterion (load bearing capacity) does not apply to pipe penetrations, they will be classified EI 30, EI 90, EI 120 etc.

Note: Resistance to fire or fire resistance is a term that always applies to a pipe penetration, i. e. a certain way of installing a pipe through a wall or a ceiling, possibly with a special penetration seal. The penetration seal may or may not be  by the same manufacturer as the pipe. A pipe in itself normally cannot have a fire resistance rating.




Solutions for Düker cast iron pipe penetrations

Please refer to the menu on the left for examples of fire-rated pipe penetrations with Düker SML pipes.





SML Specifier's Manual (pdf, 5185 KB)

with detailed information on reaction to fire and penetration seals for cast iron drainage pipe installations

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