Current developments in fire protection -Changeover to design and classification according to the EurocodeAktuelle Entwicklungen im Brandschutz -Umstellung auf die Bemessung und Klassifizierung nach euro päischen Normen The European requirements for fire safety design and testing of structural masonry members are already the governing requirements in many cases. In principle, both the European and the German classification may be used according to the Bauregelliste. However, the latter may only be used when European classification of a member or construction material is not possible because the appropriate European standards do not exist. The European standards do not differ fundamentally from the German standard DIN 4102-2. One significant difference is that according to the DIN 4102-2, it was required to carry out two tests with the most unfavourable result governing, while according to the European standard, only one test is required. According to the EN Standard, the tests for fire resistance and the reaction to fire are carried out separately. There are other differences related to the pressure in the furnace as well as the use of plate thermocouples instead of jacketed thermocouples. Fire safety design of masonry is carried out in accordance with EC 6-1-2 and the National Annex. Only the members not regulated in the EC 6-1-2, e.g. precast masonry members, non-load-bearing walls, lintels, connections and joints, should be designed and checked according to the revised DIN 4102-4.
Die brandschutztechnische Bewertung von bestehenden Deckenkonstruktionen stellt Planer und Ausführende immer wieder vor Herausforderungen. Sofern die heute erforderliche Feuerwiderstandsklasse nicht nachgewiesen werden kann, sind brandschutztechnische Ertüchtigungen unumgänglich. Bei der Ertüchtigung von derartigen Deckenkonstruktionen mit Bekleidungen oder Unterdecken ist die Nachweisführung einschließlich des Befestigungsmittels schwierig, da diese im Regelfall nicht detailliert in einem bauaufsichtlichen Nachweis enthalten ist.In einer Serie von Brandprüfungen wurden historische Deckenkonstruktionen untersucht. Dabei ging es vor allem darum, ein Gesamtsystem aus einer Brandschutzbekleidung und einer praxisgerechten Befestigung dieser Bekleidung nachzuweisen. Der Artikel dokumentiert neben den bisherigen Bewertungen solcher Deckenkonstruktionen auch die Besonderheiten des Versuchsaufbaus für die durchgeführten Brandprüfungen sowie Auswertung dieser Versuche.Fire tests on historic floor structures. The assessment in respect of fire resistance of existing floor constructions is a challenge to planners and executioners. If the today’s required fire resistance class cannot be proven, an improvement for the floor system is essential. This is done in most cases by additional claddings or suspended ceilings. The verification of the fixing of those systems is difficult because this is often not in the scope of approvals.A series of fire tests has been performed to investigate the behavior of historic floor structures under fire exposure. The complete system of fire protective cladding and its practice‐oriented fixing was subjected to these tests. The present paper explains the former approach to assess the fire behavior of historic floors, characteristics of the test specimens and the evaluation of the tests.
Die Planziegelnorm DIN 105‐6 [1] wurde überarbeitet und im Juni 2013 veröffentlicht. Einstufungen zum Feuerwiderstand für Mauerwerk aus diesen Ziegeln enthalten sowohl die entsprechenden allgemeinen bauaufsichtlichen Zulassungen des Deutschen Instituts für Bautechnik (DIBt) als auch die DIN 4102‐4/A1; 2004‐11 [2]. Im vorliegenden Beitrag werden aktuelle Prüfergebnisse vorgestellt und ein Vorschlag für eine künftige Klassifizierung in DIN EN 1996‐1‐2/NA [3] erarbeitet.Fire resistance of high precision clay unit masonry. The standard DIN 105‐6 [1] has been revised and published in June 2013. Classifications of the fire resistance for this type of masonry are available in the corresponding national technical approvals as well as in DIN 4102‐4/A1; 2004‐11 [2]. This paper summarizes latest test results and gives a proposal for a future classification in DIN EN 1996‐1‐2/NA [3].
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