Find the reactions the pin A and roller D exert on the truss

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pb23me
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Homework Statement


The rigid truss supports the loads shown. Find the reactions the pin A and roller D exert on the truss.
All concentrated loads act on the pins joining the truss members

Homework Equations


ƩMa= -5ft(3kips)-10ft(2kips)-.707(1kip)10ft+Dy(15ft)
Dy=2.80 kips*ft

The Attempt at a Solution


My question is just regarding pin B. Am I supposed to assume some force is going down and to the left-45 degrees-at this location?
 
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The truss members are supporting axial loads only.
 
And don't assume any loading at joint B, since there is no force applied there. Your last 2 terms in your sum of moments about A = 0 equation are also not correct.