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Fire safety in steel buildings.

La sécurité incendie dans les bâtiments à structure métallique.

Author(s) : KRUPPA J.

Type of article: Article, IJR article

Summary

When a fire occurs, the collapse of a steel framed building can be a greater hazard than the conflagration itself." eg a steel beam or girder which can support 24 kg per mm2 of section at 20°C will only support haft this weight ff it is subjected to a temperature of 540°C. In this context, the author lays particular emphasis on the use of selfsupporting structures and thermal barriers to prevent the steel framework reaching temperatures which will create distortion. An unprotected steel structure will attain a temperature of 936°C after an hour in a heavy fire. Various materials can be employed to reduce the temperature of the steel and from a listing given in the report, boxing the framework in plaster facings 15 mm thick will limit the temperature of the steel to 80°C in the presence of a heavy fire, it being assumed that the insulation is of noninflammable material Another important recommendation is that in the laying out of large volume cold rooms, it is absolutely necessary that the structures are independent of each other by using fire-break walls, such that a structural collapse in one room can be contained. Some interesting graphs have been prepared by the author, but in two of them (Fig. 1, the influence of the quantity of combustible material on the development of a fire and Fig. 2, the influence of the influence of the ventilation area on the development of a fire) the curve established by ISO conflicts totally with those produced by the author as regards progression.

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Pages: 75-78

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Details

  • Original title: La sécurité incendie dans les bâtiments à structure métallique.
  • Record ID : 30001040
  • Languages: French
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 6 - n. 2
  • Publication date: 1983/03

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