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Question: a laminated wooden beam 10cm wide 15cm deep is made...

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A laminated wooden beam 10cm wide, 15cm deep is made of three 5cmx10cm planks glued together to resist longitudinal shear. The beam is simply supported over a span of 2m. If the allowable shearing stress in the glued joints is 400 kPa, what is the safe concentrated load that the beam can carry at its center? (Youngs modulus of wood is 10 GPa)
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