1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Find the reactions the pin A and roller D exert on the truss

  1. Feb 25, 2013 #1
    1. The problem statement, all variables and given/known data
    The rigid truss supports the loads shown. Find the reactions the pin A and roller D exert on the truss.
    All concentrated loads act on the pins joining the truss members


    2. Relevant equations
    ƩMa= -5ft(3kips)-10ft(2kips)-.707(1kip)10ft+Dy(15ft)
    Dy=2.80 kips*ft



    3. The attempt at a solution
    My question is just regarding pin B. Am I supposed to assume some force is going down and to the left-45 degrees-at this location?
     

    Attached Files:

    Last edited: Feb 25, 2013
  2. jcsd
  3. Feb 25, 2013 #2

    SteamKing

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    The truss members are supporting axial loads only.
     
  4. Feb 26, 2013 #3

    PhanthomJay

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    And don't assume any loading at joint B, since there is no force applied there. Your last 2 terms in your sum of moments about A = 0 equation are also not correct.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Find the reactions the pin A and roller D exert on the truss
Loading...