Problem I. Steel bars and an aluminum bar support the rigid slab as a platform as shown below. A gap A = 0.26 mm exists between the aluminum bar and the slab. Neglecting the weight of the slab A (mm?) 350 a (/degree celsius) 11.6x10-6 23.1x106 E (GPa) Steel bar Aluminum bar 200 400 70 a) Which temperature increase AT is required to just close the spacing at the middle? (Note that the temperature increase will subject all bars) b) What are the stresses in the steel bars and aluminum bar for AT =_ degree celsius 76 AT in C° in MPa? 1000 mm Steel Aluminum Steel

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Beams

In structural engineering, a beam is a component made of a variety of materials (including steel alloys, and wood) that can resist loads applied laterally to the beam axis. Members, elements, rafters, shafts, and purlins are all terms used to describe beams.