Extracted text: Problem #1: All the vertical bars are constructed from steel (E = 29,000 ksi and a = 6.5 x 10 1/°F). The mechanical loading is shown and in addition the entire system undergoes a uniform temperature change of AT = 25 °F, determine the vertical displacement at point B (red circle). Note the cross- sectional area for all the vertical bars is 0.0750 in? and assume the horizontal beams are rigid. Report your answer in inches to four decimal places. E F 4 ft H. D C -2 ft- 5 ft 4.5 ft 800 lb A B 1 ft