as if the River Police where not enough now we have real live engineers on us....ahhh, I can't take the pressure!!! Where's a bottle of wine...isn't that what most artist's drink? hehe, now we know why.
Actually, thank you for mentioning these things. I always try to file them away for my future projects. It's funny too whenever someone explains one of these things, like rivers, or structural support it always makes perfect sense. Of course, it's not always fun to draw what makes sense.