Abstract
Cold formed steel (CFS) beam has been used extensively as primary load bearing structural member in many applications in the building construction due to various advantages. The built-up section made from channel CFS is motivated and has been used based on their excellent structural behavior. Built-up CFS is widely used as trusses member or space frames. In modern construction, the usage of the CFS column as structure frame has been applied in residential construction for building up to double story. RaBiB system could be one of the example. These materials must be well perform in fire incident in term if its integrity and stability of structural for a period of time. Significant research progress has been conducted in developing ambient temperature design guideline for CFS; its fire resistance has received less attention. EN 1993-1-3 2005 is a guideline for an ambient temperature of CFS structural. At present the guideline of CFS structure under fire is according to the EN 1993-1-2 2005 which is based on hot rolled steel material. It has to be designed as class 4 cross-section with reduction factors for material properties same as hot rolled steel material. However, recent research finding on elevated temperature material properties of CFS results differently. Hence, the assessment of the CFS column under fire condition has to be carried out to evaluate the current design practice are reliable for CFS. The objectives of this research are to improve design guideline to predict fire resistance rating for the built-up CFS column. This can be achieved through experimental testing and validation with numerical analysis for further column parameter. This improvement could lead to CFS in structural application is increasing. The research would lead to publication of the findings and design improvement to be referred to in the analysis and design for CFS structure column.
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