2. Figure 2 shows a rectangular steel bar welded (the weld is shown as thick lines) to a 250-mm steel channel. For the welding configuration shown in the figure, a. Prove that the moment of inertia for the weld group in terms of the weld throat length t are, IGx=(3077106) t mm and IGy = (1418106)t mm. b. From previous analysis, it has been proven that the weld corner with the longest distance from the weld group centroid is critical. Based on this information, determine the required weld size h if the load F is 16kN, E60 welding rod (S = 345 MPa) is used and safety factor SF = 2.5 based on yielding is imposed. 250 10 15 Y M16 x 2 bolts. 60 200 60 -7575- 50 300 Figure 2: Steel bar welded to a channel.