How do I know which direction the horizontal force acts

[DaiRSquared.]

Homework Statement

I am to find the reactions of a 3 pin frame.

Homework Equations

The Attempt at a Solution

So how do I know which direction to label the horizontal reactions? In the diagram HA and HF are in the same direction, I was under the impression that reactions are opposite to applied force.

I have no problems calculating a solution once i know which direction the reaction occurs.

 

[SteamKing]

Uhh, looks like someone has drawn in the direction of the horizontal forces at pins A and F.

This is why PF Rules request that posters provide a complete description of the HW problem and use of the HW template.

 

[DaiRSquared.]

Yes that was me. I know the method to calculate a solution providing I know which directions the horizontal reaction forces act.

My question was how do I know which direction the reaction forces act or what bit of information in that diagram tells me that HA and HF both act to the Right.

 

[donpacino]

Homework Statement

I am to find the reactions of a 3 pin frame.

Homework Equations

The Attempt at a Solution

So how do I know which direction to label the horizontal reactions? In the diagram HA and HF are in the same direction, I was under the impression that reactions are opposite to applied force. View attachment 82851

I have no problems calculating a solution once i know which direction the reaction occurs.

If you draw the forces in the wrong direction, you will simply get a negative number in your answer!

 

[DaiRSquared.]

I have already solved my problem and would have marked it solved if i knew how. Your answer was the one I was looking for, thank you for taking the time to read the problem and reply.