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Difference between frame and truss


Many times in our daily engineering work life the words truss and frame are used in place of each other, though they have many similarities but there exist some differences between truss and frame.

Truss and frame both are constructed by some triangular members and connected at joints.
In truss, joints are of pin joint type and the members are free to rotate about the pin. So, truss cannot transfer moments. Members are subjected to only axial forces (tensile and compression).
On the other hand, members of frames are jointed rigidly at joints by means of welding and bolting. So the joints of frame could transfer moments also in addition to the axial loads.

Practically, you may see trusses with no flexibility in joints, but still the analysis could be acceptable, if you assume it as a perfect truss.

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Suvo

Suvo is a production engineer by profession and writer/blogger by passion. Apart from maintaining this blog, he also get some freelance work like: Mechanical design, CAD, CAE, Assignment report writing, Website design. Read More>>

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