Design tables for the utilisation factor &agr;6, fi for the structural fire design of masonry according to DIN EN 1996-1-2/NA in the simplified calculation method / Bemessungstabellen für den Ausnutzungsfaktor &agr;6, fi für die Bemessung von Mauerwerk im Brandfall nach DIN EN 1996-1-2/NA im vereinfachten Verfahren

Easy-to-use verification equations are available for the verifications in the simplified calculation method. This applies also for the structural fire design of those masonry types for which a verification with the utilisation factor &agr;fi is given in the National Annex DIN EN 1996-1-2/NA. In specific applications, however, a classification can only be made applying the utilisation factor &agr;6,fi. In these cases, the verification for the structural fire design by calculation is considerably more complex than the mathematical verification of the structural design in the “cold state”. The present paper shows how the design equation for &agr;6,fi can be made significantly easier with regard to its application by reference to the design value of the vertical load bearing resistance in the simplified method. Moreover, an upper limit value for the utilisation factor &agr;6,fi for the simplified method is summarised in tables.