Pin A & C: Why No Y Component in Solution Manual?

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SUMMARY

The discussion centers on the misunderstanding regarding the absence of a vertical component at pin C in a truss system, despite pins A and C appearing identical. It is established that both pins are capable of supporting vertical and horizontal forces; however, in this specific scenario, no vertical force acts on pin C. The key conclusion is that for a vertical component to exist at pin C, member CD must be inclined rather than horizontal, which is not the case in this problem.

PREREQUISITES
  • Understanding of truss structures and their components
  • Knowledge of static equilibrium principles
  • Familiarity with pin joint behavior in structural analysis
  • Basic concepts of force components in two-dimensional systems
NEXT STEPS
  • Study the principles of static equilibrium in truss analysis
  • Learn about the behavior of pin joints in structural mechanics
  • Explore the effects of inclined members on force distribution in trusses
  • Review examples of vertical and horizontal force components in engineering problems
USEFUL FOR

This discussion is beneficial for civil engineers, structural analysts, and students studying mechanics of materials, particularly those focusing on truss design and analysis.

fayan77
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Homework Statement


Pin A and C are the same, however in the solution manual it shows that C does not have a y component. Why is that?

Homework Equations

The Attempt at a Solution

 

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fayan77 said:
Pin A and C are the same
They are not.

How would the beam at C transfer a vertical component?
 
they are tho, they look exactly the same. why is it that c does not provide a vertical force?
 
fayan77 said:
they are tho, they look exactly the same. why is it that c does not provide a vertical force?
They are both pinned joints capable of taking forces in both the vertical and horizontal direction, but in this problem, no vertical force exists at C. You should attempt to answer the question asked by @mfb. What do you know about truss members with forces applied at joints?
 
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In order for there to be a vertical component of reaction at C, member CD would have to be inclined rather than horizontal..
 

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