The three-dimensional truss shown in the
Transcribed image text: The three-dimensional truss shown in the accompanying figure is made of aluminum alloy with E = 10.4 × 106 (lb in2 ) and is to support a sign weighing 1000 lb. The Cartesian coordinates of the joints with respect to the coordinate system shown in the figure are given in feet. The cross-sectional area of each member is 3.14 in2.
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