Calculating Support Reaction Forces using Method of Joints

[daphnelee-mh]

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

 

[daphnelee-mh]

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 ?

 

[Baluncore]

Will the support reaction forces G and H not sum to the weight of the structure, plus the load ?

 

[daphnelee-mh]

Will the support reaction forces G and H not sum to the weight of the structure, plus the load ?

Sorry I don’t understand