Steel Buildings in Europe

Part 6: Fire Engineering 6 - 7 Figure 2.1 Unprotected open multi-storey car park in Germany (R0) When adopting a prescriptive approach, fire behaviour modelling is not required and thermal actions should be based on the standard temperature-time curve (ISO curve). The heat transfer calculations used to determine the temperature-time history of the structure are iterative and usually require some form of automation. Simple equations for protected and unprotected steel sections are provided by EN 1993-1-2 [3] and EN 1994-1-2 [4] . Alternatively, there are a number of commercially available software packages based on finite element or finite difference analysis methods. For steel-concrete composite structural elements, the design methods provided in the Informative Annexes to EN 1994-1-2 also include tabular data which avoid the need for heat transfer analysis, but the methods are restricted in scope. Compliance with prescriptive requirements may be demonstrated using analysis, tabulated results based on testing and/or analysis, or individual results obtained from standard fire tests. Structural analysis may be based on simple engineering models that consider individual structural members or finite element models that allow structural sub assemblies or full structures to be analysed. Tabular Data Tabular data on fire performance may provide generic or product specific data. Generic tabular data for steel and steel-concrete composite structures is available in EN 1993-1-2 and EN 1994-1-2. The critical temperature method in