A two-tier system to repair bridge infrastructures is supported by two steel cables for each platform (Figure P5.15). All the support cables have a diameter of 0.50 in. Assume the applied loads are at the midpoint of each platform. Determine how much each cable stretches at points A–D.

Figure P5.15

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140 in. 90 in. 250 lb 185 in. A 190 in. 400 lb D