You are working outside on the thingamajig shown, on a hot (100 degree F) summer

Question

You are working outside on the thingamajig shown, on a hot (100 degree F) summer day. Everything is in place as shown in the sketch, with the nuts finger - snug, but not tightened. You decide to go inside for a cold beer. You don't get back to your project until winter, on a cold (28 degree F) day. To your surprise, you can't budge the nuts by hand. Member ABC is rigid. The rods are 3/4" in diameter. E = 28 times 103 ksi A = pi/4(3/4)2 = .4418 in2 alpha = 9.6 times 10 - 6/ degree F Delta T = 100 - 28 = 72 degree F Determine: The force in rods AD and BE The deflection of point A

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I can't see the Problem very well. Please shrink problem down for easier understanding. Thanks.

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