Checking My Work: Solving for Force in Member GH

AI Thread Summary
The discussion centers on verifying the force in member GH of a truss, where the user calculated a tension of 11.3, while a calculator shows 6. The load applied at joint C is 12.5, with a roller at joint I and a hinge at joint F. Other participants suggest that the user's calculations appear correct and advise against relying on the calculator if it seems inaccurate. The consensus leans towards trusting the manual calculations over the calculator's output.
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1. Homework Statement
I solved for all the forces in the members, but I was using a force truss member calculator to check my work. All the forces match up with the calculated but one, that is the force in member GH. I get 11.3 in tension the calculator gets 6 in tension. So am I right or the calculator? I attached the diagram. The load is 12.5 and is applied at joint C. There is a roller at joint I and a hinge at joint F. Can someone solve for member GH and tell me what they get.

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Your answer looks about right. What force did you get in AG? If the calculator is messed, I wouldn't compare your answers to it for any member.
 
PhanthomJay said:
Your answer looks about right. What force did you get in AG? If the calculator is messed, I wouldn't compare your answers to it for any member.
6.91 in tension
 
Thread 'Have I solved this structural engineering equation correctly?'

Thread 'Have I solved this structural engineering equation correctly?'

Hi all, I have a structural engineering book from 1979. I am trying to follow it as best as I can. I have come to a formula that calculates the rotations in radians at the rigid joint that requires an iterative procedure. This equation comes in the form of: $$ x_i = \frac {Q_ih_i + Q_{i+1}h_{i+1}}{4K} + \frac {C}{K}x_{i-1} + \frac {C}{K}x_{i+1} $$ Where: ## Q ## is the horizontal storey shear ## h ## is the storey height ## K = (6G_i + C_i + C_{i+1}) ## ## G = \frac {I_g}{h} ## ## C...
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