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The compound beam is fixed at A and supported by a
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    Alex Brown answered this
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    Draw the free body diagram of the beam as follows: 8 kN 6 kN 12 kN M D , B. Ã3m 2 m 1 m 1 mfi mzem, 2 m Consider the horizontConsider the member DB and draw the free body diagram as follows: 8 kN 6 kN DV V B D, Kn mx1m 1 Consider moment equilibrium aConsider the member BC and draw the free body diagram as follows: 12 kN В В Е У 1 m [1 m 1 m Consider the moment equilibriumConsider the vertical force equilibrium as follows: SF, = 0) E, +C, = B, +12 C, = 4 +12-12 C, = 4 kN Consider the whole beamConsider the member AD and draw the free body diagram as follows: 8 kN MA VD D. 3 mConsider the moment equilibrium at D as follows: Mo = 0 34, +MA=0 MA=-34, M =-(3x10) MA=-30 kN. m

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