Civil Engineering MCQAE Level Civil Engineering
The degree of static indeterminacy of a pin-jointed plane truss with m members, j joints, and r external reactions is:
Structural AnalysisTruss IndeterminacyMEDIUM
Choose the correct answer
A
3m + r - 3j
B
m + r - 2j
C
2m + r - 3j
D
m + r - j
Correct Answer
B. m + r - 2j
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For a pin-jointed plane truss, each joint has 2 equilibrium equations (ΣH = 0, ΣV = 0). DSI = m + r - 2j.
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