[off topic]
I'm taking a studio course right now as a fourth year elective. It's a collaborative design class that's mixed engineers and architecture students. Anyhew, this course has offered a series of weekly lectures, and among them was a lecture by Jonathan Sakila, who works in structural glass. It was an amazing presentation... I would never have guessed that glass could be used in such a wide variety of
structural roles... beams, columns, walls, entire staircases... really quite awesome stuff.
[/off topic]
Anyhew, back on topic... I was looking at some material properties of polycarbonate, and noticed that it's tensile capacity is quite high (9000psi / 62.1 MPa) compared to its compressive strength (12000psi / 82.7MPa), and that it's flexural capacity is quite high as well. Still, quite aparent that it will fail in tension, as Bill has said.
By the way, I got those numbers
here.