Why are there two values of Hy here?

[edsoneicc]

Homework Statement

Homework Equations

∑M at H = 0 and ∑M at I = 0
∑Fy = 0

The Attempt at a Solution

Assuming that Iy is positive and Ix is negative; Hy is negative and Hx is positive.

Now I would like to compute for Iy and Hy using
∑M at H = 0 = Iy(2.3) - 50(3.05)
Iy = 66.3043
∑Fy = 0 = -50 + 66.3043 - Hy = 0
Hy = 16.3043

But if I use
∑M at I = 0 = Hy(2.3) - 50(3.05)
Hy = 66.3043

Why do I have different values for Hy?Also, is DI a two force member?

 

[NascentOxygen]

But if I use
∑M at I = 0 = Hy(2.3) - 50(3.05)

Are you sure about that 3.05 distance?