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Unformatted text preview: long A B C D E F G H I 1000 lb 500 lb 6’ each vertical section is 4’ long Example: Suppose we want to find the force in member GH, which is buried deeply in the truss C D E F G B 4’ 4’ 6’ 4’ 1000 lb 500 lb FBC FBG FGH B M = ∑ + ( 29 ( 29 ( 29 ( 29 1000 12 500 4 6 2333.3 GH GH F F lb + + = = -FGH = 2333.3 lb C Zero Force Members A truss may have members which do not carry any loads (zero force members) but which are needed for stability or for other reasons. The truss we just considered is a good example: A B C D E F G H I 1000 lb 500 lb 6’ Can you identify the zero force members?...
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This note was uploaded on 10/17/2011 for the course EM 274 taught by Professor Boylan during the Fall '08 term at Iowa State.
- Fall '08