Calculate forces in truss members...help??

Question

http://i29.photobucket.com/albums/c296/pauloz_/Question.jpg

Find the force in member BE if both A and F are pin joints.

Take tension as positive. YOU DON'T HAVE TO SHOW WORKING, JUST AN ANSWER. You can show working of you like, but i just need confirmation whether i'm wrong or not. Also you should use the "Method of Joints".

I've racked my brain over this question and supposedly i'm getting the wrong answer. This was an assessed question for uni where you type the answer online. I typed my answer in and it said I got the question correct but after the submission i found my working was VERY incorrect - my first line had a silly mistake. The submission has ended so i got full marks but i got a feeling I probably got it right by chance, but when i do it correctly, i get the answer wrong.

Answer 1

I calculate force in BE = 45 kn compression by method of joints.

I would caution when calculating the angles of the interior angles.  That is an easy place to make a mistake.  Also watch you sign convention.  That is another pitfall.

The method of sections in infinitely easier.

Answer 2

I got compressive 308.3KN. d**n you, I did this like 7 years ago. My brain is all rusty...