Recent content by Comfy

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    Checking My Work: Solving for Force in Member GH

    6.91 in tension
  2. C

    Checking My Work: Solving for Force in Member GH

    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...
  3. C

    Having trouble calculating reaction forces for this truss.

    I have more than 2 equations, I have sum of forces in y and sum of moments about any of the supports. It is statically determinate because 2 (11 joints)=17 members+5 reactions. What do you mean by 2 equations of statics?
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    Having trouble calculating reaction forces for this truss.

    I I have 4 equations Sum of forces in y direction and the
  5. C

    Having trouble calculating reaction forces for this truss.

    This truss is statically determinate now, and should be solvable, right? That is why I don't understand why I am having trouble solving for the support reactions.
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    Having trouble calculating reaction forces for this truss.

    Homework Statement Calculate reaction forces for truss. Truss is attached in picture. Homework Equations ΣFx=o ΣFy=0 ΣM about reaction point=0 The Attempt at a Solution attached in picture
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    Method of joints for bridge truss

    So what you are saying is that there should not be rollers on top of the cliffs? That drawing is from my teacher as a guideline to get us started and such.
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    Method of joints for bridge truss

    When I calculate support reactions for the truss I made with the 12.5 kip load in center I keep getting zero. That should not happen, unless I am mistaken.
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    Method of joints for bridge truss

    We are suppose to design a truss that can handle a load of 12.5 kip at the center of this bridge. There is a roller at the top left just under bridge, there is a roller at top right just under bridge, there is a roller on support underneath bottom right of bridge, and there is a hinge on...
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    Method of joints for bridge truss

    There is a roller at A, C and F. There is a hinge at D.
  11. C

    Method of joints for bridge truss

    That is the right thing to do right? I keep getting Fy and Cy to cancel out during my sum of the moments equation? So I have sum of moments about D to be 0=0?
  12. C

    Method of joints for bridge truss

    Homework Statement Calculate the forces for each member. Homework Equations Sum of forces in x=0 Sum of forces in y=0 Sumof moments about D=0The Attempt at a Solution Work is on attached image of problem. I'm having trouble solving for support reactions. At D there is [/B] a hinge. At A...
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