FAQ 004948 EN-US

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How are hot-dip galvanized components considered for fire resistance in the RF‑/STEEL EC3 add-on module?

Answer

The hot-dip galvanized components can be considered as follows:

Since the emissivity increases by leaps and bounds, remains constant, and is only included as a factor in the Eurocode formulas, you could calculate and use the emissivity for a component with the fire resistance class > 30 by hand. (mean value)
 

Calculation of Emissivity

ε=0.35 · 30min + 0.7 · (total time - start time with lower value (30min))total timeExample with 90 min:ε=0.35 · 30min + 0.7 · (90min - 30min)90min = 0.58

ε Emissivity
  

This value takes into account the reduction at the start of the fire.

Keywords

Hot-dip galvanized Fire resistance Galvanized

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  • Updated 03/03/2021

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