4.160 Find the forces in whichever of $B_1$, $B_2$, $B_3$, and $B_4$ are two-force members. (See Figure P4.160.)
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In this case, we have a system of two built-in hinges, which means there are no external forces acting on the system. The only forces present are the forces in members B1, B2, B3, and B4. Show more…
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