Hi Baluncore, thanks for your reply, my understanding is CB supports the door in the open position as you say.
That is also my question, I would assume so otherwise the angle has no purpose.
1. In the attached imjage, the centre of gravity of an open door acts at G equal to 255N;
a) Determine the x,y,z, components of reaction at the hinge A in equilibrium
b) Determine the force along CB
Little stuck with this problem, obviously this falls under resolving forces. I assumed Az,Ay = 0...