Calculating Support Reaction Forces using Method of Joints

AI Thread Summary
The discussion focuses on calculating support reaction forces using the method of joints and highlights confusion regarding equilibrium equations. It is noted that applying these equations may lead to a cancellation of forces, resulting in a zero reaction force. Participants question whether summing moments at a specific point can provide an additional equation for solving the problem. There is uncertainty about whether the support reaction forces should equal the total weight of the structure plus any applied loads. Overall, the conversation emphasizes the complexities involved in analyzing statically indeterminate structures.
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Summary:: The question requires us to determine the member forces using method of joints but I couldn’t figure out how to calculate the support reaction forces

I tried to use equilibrium equations to solve the question but the force applied will be canceled out, and eventually the reaction force will be zero
 

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Summary:: The question requires us to determine the axial forces using method of sections but it is statically indetermine structure

Can I make up one more equation by summing the moment at point O ?
 

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Will the support reaction forces G and H not sum to the weight of the structure, plus the load ?
 
Baluncore said:
Will the support reaction forces G and H not sum to the weight of the structure, plus the load ?
Sorry I don’t understand
 

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