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OpenStudy (anonymous):
When a building is constructed at −10oC, a steel beam (cross-sectional area 45 cm2) is put in place with its ends cemented in pillars. If the sealed ends cannot move, what will be the compressional force in the beam when the temperature is 25oC. For steel αs = 1.1×10−5 oC−1 and Y = 2×1011 N/m2.
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