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Unformatted text preview: The boy with the wrench grows up to be a construction worker. He needs to lift a heavy bar so he puts together the rigging shown below that will attach to a crane. His sister who happens to be his boss tells him that it is not a safe rigging, and he should only use one bolt. In addition to lacking intelligence, he is stubborn and refuses to change the rigging. He lifts the object, the bolts fail and his sister fires him. Show why the bolt forces on the two-bolt system are likely to be much higher than the loads on the 1 bolt system. w w Cable to crane 3. Draw any truss structure, place loads at different points and use methods of sections to determine forces in bars....
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- Spring '09
- Force, $5, Bolt, 2L, 50 lbs, cross-sectional area A.