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Reaction of pin support

  1. Oct 23, 2015 #1
    1. The problem statement, all variables and given/known data
    why the reaction of pin is only acted towards the pin ( the horizontal of reaction of the force is directed to the left , whereas the the vertical component is acted upwards ) , why cant the horizontal of reaction of the force is directed to the right , whereas the the vertical component is acted downwards ??? since the pin support will resists all translation , right ?

    2. Relevant equations


    3. The attempt at a solution
     

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  3. Oct 23, 2015 #2

    SteamKing

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    You're taking this diagram too literally.

    The point is, a pin connection can take a reaction which has both vertical and horizontal components. The direction in which the arrows point in this diagram is irrelevant.

    The simple support shown just above the pinned support seems to be in error. Simple supports can take only vertical reactions, not horizontal reactions.
     
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