With reference to a steel beam located at the ceiling of a small room irradiated by a burner located on the floor, that is the fire\udsource, the Adiabatic Surface Temperature (AST) has been evaluated. Surface temperatures of the beam and the heat fluxes\udreleased to it (conjugate case) are then compared to those in a single beam with the AST as boundary condition (standalone case).\udResults show that, by assuming AST as the exchange parameter between fire and structural models, differences between\udconjugate and standalone case are strongly dependent on the convection coefficient assumed in the latter one.
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