Tension in System: 4.22 kN | Working Explained

[goldfish9776]

Homework Statement

I was asked to find the tension in CD in this question . The ans given is 4.22kN.
my working is arc tan (surd 13)/12, tetha = 16.7 degree
CD cos (16.7) = 20kN
CD= 21kN.
p/s: i have used pythagora's theorem to fe the surd 13

Homework Equations

The Attempt at a Solution

 

[paisiello2]

I don't think there can be tension in member CD.

 

[haruspex]

Homework Statement

I was asked to find the tension in CD in this question . The ans given is 4.22kN.
my working is arc tan (surd 13)/12, tetha = 16.7 degree
CD cos (16.7) = 20kN
CD= 21kN.
p/s: i have used pythagora's theorem to fe the surd 13

Homework Equations

The Attempt at a Solution

The diagram is very unclear. I'm not sure what the various distances refer to, or where the A and B points are in space. Is there a verbal description that goes with it?

 

[goldfish9776]

I don't think there can be tension in member CD.

actually I'm asked to find tension in CD, AD , and BD. I've found Cd only . I have no idea at all for AD and BD

 

[goldfish9776]

The diagram is very unclear. I'm not sure what the various distances refer to, or where the A and B points are in space. Is there a verbal description that goes with it?

the book stated ' determine the load in each member of the frame shown in Figure .'

 

[haruspex]

the book stated ' determine the load in each member of the frame shown in Figure .'

Well, I cannot interpret the diagram. If it is clear to you, please explain your interpretation ( provide co-ordinates for each of the points).