Is it necessary to protect the mezzanine against the fire?

FIRE RESISTANCE OF THE MATERIALS INCLUDED IN MEZZANINES

Mezzanines are formed by several pieces of different materials and coatings, therefore the classification of the fire resistance (reaction to fire) is different depending on the material. This fire reaction classification of the construction products and building elements is defined in the european standard EN 13501-1, commonly called Euroclasses.

The classification of each material type used in mezzanines is indicated down below:

Steel pieces without treatment

A1

Steel pieces black-painted 9005 (polyester powder paint)

A-s1,d0

Steel pieces white-painted 9010 (polyester powder paint)

B-s2,d0

Boards of the supporting floor. Structural chipboard for humid environment P5 (EN 312-P5)

D-s2,d0

 

FIRE STABILITY OF MEZZANINES

Metallic mezzanines have a bearing structure formed by columns, steel primary beams and steel secondary beams, as well as steel connectors and screws. This structure is not endowed with neither any type of passive protection nor intumescent treatment. Because of that, a fire stability greater than the one provided by the steel on its own is not guaranteed (no longer than 10 minutes, according to the literature related to steel construction).

The fire stability requirement of a mezzanine during a certain time will be determined by the usage of it (above and under it). It is the responsibility of the owner to comply with the current legislation applicable in the town where the mezzanine is located. Depending on whether the mezzanine is installed in an industrial environment or in a domestic atmosphere, on its size, location, etc. the regulation can or not demand a certain fire stability to that bearing structure.

You can consult with Mezzanines Oniline technical department for further information.

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