Abstract
This paper presents properties of newly developed fire resistant steel (FR steel) for building structural use. Because of the elements contained, FR steel excels, compared to conventional structural steels, in strength at elevated temperatures. Elevated temperature tensile tests were carried out and their results were expressed in numerical values. Full scale column fire tests with loading were also carried out and it was confirmed that FR steel loadbearing members can display the elevated temperature characteristics of FR steel itself. Also actual examples of building using FR steel, where a reduction and elimination of fire protection materials, were presented.
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