Assessment of Steelwork after a Fire

摘要

When considering whether steelwork that has been subject to fire can be re-used, a general rule of thumb is that if the steel is straight and there are no obvious distortions then it is probably still fit for purpose. At 600℃ the yield strength and stiffness of steel is equal to about 40% and 30% respectively of their room temperature values. Any steel still remaining straight after the fire and which had been carrying an appreciable load was probably not heated beyond 600℃, will not have undergone any metallurgical changes and will therefore be fit for re-use.