A W40x149 A36 steel girder spans 12 m on simple supports. It carries a uniformly distributed load of 75 kN/m over its entire length, and equal concentrated loads of 30 kN at quarter points of the span. (Ix = 4071x10⁶ mm⁴ ; Sx = 8390x10³ mm³ ; d = 970 mm; Aflange = 28,258 mm² ; Iy = 95x10⁶ mm⁴). Neglect the weight of the beam. a. Determine the width top and bottom reinforcing plates 14 mm thick if necessary.

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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).