File:Bafirerm.jpg
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Bafirerm.jpg (548 × 380 pixels, file size: 124 KB, MIME type: image/jpeg)
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DescriptionBafirerm.jpg |
English: This is a graphic depiction of a room on fire and what happens when proper firestops are not present. We have fuel for our fire. It burns and gives off flames and smoke. If there is a lot of plastic, such as PVC, polyvinylchloride, the chloride part separates and bonds with moisture in the air. Hydrochloric acid forms, which is lethal. It also corrodes electrical contacts and can decimate electronic equipment. (Continuity of Operations…). Heat rises. We have higher pressure near the top of the room and lower pressure towards the floor. Somewhere in there, we have a neutral plane of pressure. This, by the way, is what is re-created in fire testing of certified fire protection products, such as wall and floor systems and firestops. If I have holes in the ceiling or at the top of the walls, the high pressure inside the room ensures that highly toxic, corrosive, re-ignitable flue gases are distributed way beyond that room. It does not take a lot of fuel to generate a lot of smoke. And that is what causes the majority of fatalities. If there are openings in the walls, closer to the floor, or in the floor, and they are not properly firestopped, fresh oxygen enters room, to make things worse. Of course, if your building is held up with unprotected steel, this will first expand and then soften and collapse, unless suppression methods are successfully employed.
Deutsch: Die Zeichnung stellt dar, was passiert, wenn Feuer in einem Raum ausbricht. Da Hitze steigt, erhitzt sich der obere Teil des Raumes sofort. Unten, außerhalb des Brandherdes, ist es erst kühler. Unten herrscht Unterdruck, oben ist Überdruck. Die Schnittstelle dazwischen ist druckneutral. Wenn der Raum perforiert ist wegen Baufugen oder Durchbrüchen für Elektroleitungen, Rohre, Kabeltrassen usw. und wenn diese nicht ordnungsgemäß abgeschottet sind, dann werden in den oberen Löchern Hitze und Rauchgase schnell herausgedrückt. Löcher im unteren Bereich sorgen für frische Sauerstoffzufuhr. Frische Luft wird schnell hereingezogen und treibt den Brand weiter voran, bis entweder der Brand gelöscht wird, der Brennstoff verbraucht ist oder bis der Raum oder das Gebäude zusammenbrechen. |
Date | |
Source | Own work |
Author | Achim Hering |
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I, the copyright holder of this work, hereby publish it under the following licenses:
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 00:53, 15 October 2009 | 548 × 380 (124 KB) | Achim Hering (talk | contribs) | {{Information |Description={{en|1=This is a graphic depiction of a room on fire and what happens when proper firestops are not present. We have fuel for our fire. It burns and gives off flames and smoke. If there is a lot of plastic, such as PVC, polyviny |
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