Tightly closing door

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In contrast to smoke protection doors , the requirements for tightly closing doors are not standardized.

Tightly closing doors as well as smoke-tight doors are required in various places in the building supervisory regulations, especially in the building regulations of the federal states, as a preventive fire protection measure (see e.g. § 35 (6) of the model building regulations).

In the administrative regulations for the state building regulations it is sometimes stated: "Doors with a butt-closing or rebated door leaf and a seal running around at least three sides are considered to be tight-closing. Glazing in these doors is permitted."

In contrast to smoke-tight doors , tightly closing doors do not have to be equipped with a seal for the floor gap. Also, tight fitting doors must only be self-closing are carried out, if this is also required.

Due to the open floor gap, smoke can penetrate the door if there is a pressure difference on both sides of the closed door, if the smoke has already cooled down and has sunk to the area of ​​the floor gap or if the smoke fills the entire air space (e.g. in the upper Shot of a staircase).

In practice it has been found that tightly closing doors have leak rates of 200 to 400 m³ / h at a pressure difference of 50 Pa.

The Bavarian state building regulations require that doors in stairwells of necessary stairs must also be "full-walled", which should exclude door leaves made of honeycomb and tubular chipboard and glazed doors. The administrative regulation for the North Rhine-Westphalian state building code also mentions "full-walled" as a feature of tightly closing doors. In contrast to the Bavarian definition of the term, this only means that the door leaves should not have any further openings.

literature

Individual evidence

  1. ↑ Article on tightly closing doors at Baunetzwissen.de
  2. ↑ Article " Tightly Closing Door" on Secupedia
  3. ↑ instruction sheet for the distinction of "smoke doors, smoke-tight doors and tightly closed doors," Grauthoff door group; accessed in February 2017