Figure Q2 illustrates a composite column with a concrete in-filled structural hollow section with CHS 244.5 x 12mm S355 with Grade 60 concrete. 35 12.0 12.0 244.5 244.5 Cold state Hot state Fig. Q2 Section properties: D/t = 20.4 I= 5940 cm Z = 486 cm A, = 8770 mm² J = 11900 cm* ; S=649 cm³ Evaluate the compression capacity of the composite column to EC4: 1-1 in cool state.

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Connections

In steel structures, connections are the members that join two or more steel members. The connections are the most important members of any steel structure, and hence, they are designed more carefully. The majority of the construction cost of steel structures is incurred due to the connections. The design of connections is done as per the recommendations and specifications of the American Institute of Steel Construction (AISC).