7. Calculation methods for mechanical strength
7.1 Simplified rules for calculating straight section properties
The standard proposes two simplified methods: the reduced cross-section method and the reduced properties method. For application in France, the National Annex has retained only the reduced cross-section method.
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Reduced cross-section method
The effective cross-sectional area is obtained by reducing the initial cross-sectional area by the effective carbonization depth of ef (figure 7 ) according to :
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Calculation methods for mechanical strength
Calculation procedures for sub-systems (floor and wall)
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