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Question
The degree of static indeterminacy of a pin-jointed space frame is given by (where m is number of unknown member forces, r is unknown reaction components and j is number of joints)
Options:
A .  m + r – 2j
B .  m + r – 3j
C .  3m + r – 3j
D .  m + r + 3j
Answer: Option B

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