Extracted text: 3. Determine the stress in each of the two vertical rods if the temperature rises 50 °C after the load P=75 KN is applied. Neglect the deformation and mass of the horizontal bar AB. Use Ea = 75 GPa, as=23.0 um/m-°C, Aa = 850 mm2 Es = 210 GPa, as = 11.9 um/m-°C and As = 650 mm² . %3D %3D Steel Aluminum 3m 2.5m 3 m 3 m 3 m 75 KN