The structure shown in Figure 3.1 consists of bar BD and two rods, AD and CD. Assuming that the self-weight of the structure is negligible and that all the structural members are connected via pins, what is the necessary diameter for the rods AD and CD to support a load of P = 300KN if the tensile stress in the rods must be equal to 150 MPa? D Rods P 2.5 m 2.0 m B 2.0 m A 4.5 m 1.5 m
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