truss help

[gozita73]

The space truss showin has compression and tension forces acting in the members as shown.

http://i35.tinypic.com/t6pfg1.png

Force F is 10kN, determine the three unknown forces (F1, F2 and F3).


I know that it should be the summation of Fx, Fy and Fz, however for F1, there is no reaction force, so I don't know what to do.

Can somebody please help?

[RandallB]

Attach A & B to a vertical wall.
What force is needed directly on the wall at the level of F3 to stop the wall from being pulled over by F.

[gozita73]

so the x component of F1 would be supported by the wall??

[gozita73]

bump ?

[PhanthomJay]

so the x component of F1 would be supported by the wall??I'm not too good looking at 3D, but something appears wrong with your picture. There appears to be no way for the x component of the F1 force to be balanced at the joint, since the other 3 members all lie in the yz plane, unless the picture is misleading or incomplete?