Arch orientation

[MamaHawk]

Hi everyone, I'm trying to figure out which direction to "point" my veggie arch, if it's even feasible. I'm hoping to have squash, cukes, beans and peas climbing the arch, with maybe some flowers, and I don't know how to orient it to get the right amount of sun. It would be in the side yard with sun most of the day, until about 6-7pm when the tree shade covers that area. That being said, since it's an arch that could shade itself, should I have the opening of the arch run east-west (so veggies on the north and south sides) or visa versa?