- Author
- Fredlund, B.
- Title
- Berankning av bidraget till brand-motstandet fran skivmateria oh trapaneler. (Abstract in English)
- Coporate
- Lund Institute of Science and Technology, Sweden
- Report
- LUTVDG/TVBB-3046, 1989, 53 p.
- Keywords
- construction | test methods | load bering elements | wood | computer programs | fire resistance tests
- Identifiers
- WOOD1
- Abstract
- In an increasing number of countries, fire classification of elements of construction which is based on analytical treatment instead of the results of furnace tests in accordance with ISO 834 is beginning to be permitted. In Sweden, analytical fire engineering design of loadbearing and separating constructions as an alternative to design on the basis of standardized thermal action in accordance with ISO 834 has been approved for a long time. The results of all calculations are presented in diagrams in which the three different calculated quantities have been set out as a function of the distance from the surface exposed to fire at different times. The presentation comprises temperature profile, density distribution and moisture profile. Assessment of the fire resistance of the board materials is based on the same performance requirements as those set out in the internationally accepted test method, ISO 834, or its Swedish counterpart SIS 02 48 20. This implies for the calulations that the fire resistance is taken to be the time when the insulation requirement is no longer complied with, i.e., when the rise in temperature on the unexposed face exceeds 140 dec C. A comparison of the calculated fire resistances and those measured in the tests shows very good agreement. The maximum difference between the tests and the calculations is only about 1 minute.