Solve the grid structures shown in Figure using a computer program. For grids P5–54, let E = 30 × 106 psi, G = 12 × 106 psi, I = 200 in.4, and J = 100 in.4, except as noted in the figures. In Figure P5–54, let the cross elements have I = 50 in.4 and J = 20 in.4, with dimensions and loads as in Figure P5–53
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