RST Engineering wrote:

A good engineer can build a bridge that won't collapse under any known
condition.

A GREAT engineer can build a bridge that won't collapse under any known
condition -- just barely.

Will I use 3/8" next year? Probably not. I'll up it to 1/2" and see if I
still get a bow. If so, I'll up it to 3/4".

Just use the other side every other year! That is what CREATIVE
engineers do... :-)

Matt