Problem with caclulatin forces in structure

[louike]

Hallo all, I have been working on a little problem.
I have to calculate the forces on a certain structure, but I can not seem to find the solution.

I have given a picture, drawing with my attempt and the drawing of how I try to solve it.

The first drawing is to find the first forces, those are easy.
Then I split the structure in 2 structures to find the other forces, however when I do this I get 2 structures with 3 equations, in total 6 equations. But when you try to work those 6 calculaitions, you will see they are the same (meaning those 6 equations are only 3 equations).

Any one who can help me out here?

The forces 450N and 300N are given.

http://img375.imageshack.us/my.php?image=teck0.jpg
http://img375.imageshack.us/my.php?image=teck0.jpg
The distances are in metres (drawing is not really accurate in scale:rofl:)

As you can so I start of with calculating the force on A , then I find the forces in C.

But then I get stuck.

 

[Redbelly98]

You're obviously aware that all the forces must balance each other, i.e. they sum to zero.

What else should sum to zero here?p.s. Welcome to PF!

 

[louike]

You're obviously aware that all the forces must balance each other, i.e. they sum to zero.

What else should sum to zero here?


p.s. Welcome to PF!

I do not know.

I just wrote down 3 equations for each drawing (1+2) meaning 6 in total, but they are the same.

1.

X forces: 450N + Dx + Bx = 0
Y: By - Ay - Dy = 0
M around B makes: +Ay. 0,15 -450. 0,25 - Dy.0,45 + Dx.0,1


for 2 its the same: they are the same then for 1.


so what can I do then?