Replying to Idea for a Jib

I was sitting around and had an amazing idea for a huge jib.

I was thinking of taking a wood pallet and screwing a thin sheet of hardboard (kind of thin, manufactured wood with a slippery topsheet, much cheaper than plastic)  to the top of it. BOOM! You have a cheap, giant 40"x48" box.

Now, one question for all you experienced Jib builders out there. Is coping necessary? I was thinking of putting some angle iron or something similar on the edges. Opinions?