Civil Engineering - Theory of Structures - Discussion


In the truss shown in given figure the force in member DC is

[A]. 100 t compressive
[B]. 100 t tensile
[C]. zero
[D]. indeterminate

Answer: Option C


No answer description available for this question.

Sanyogita said: (Feb 11, 2015)  
First consider joint C then find out forces fbc & fcd by using summation fx & fy then get answer zero.

Sophia said: (Feb 12, 2015)  
How did you come around zero?

Alagarbrindha said: (Mar 27, 2020)  
Take joint C,

Summation of vertical force as zero,

Force in DC * cos 30 = 0.
Hence force in DC = 0.

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