I discovered a handy little free resource from one of the places I routinely buy metal.
http://www.coyotesteel.com/trailerrunninggear.shtml It's a handy little booklet in pdf form that they put together for building trailers. Not teardrops specifically, but a lot of it carries over. Anyway I thought I'd share, it has lots of basic information.
Just click the picture of the booklet when you get to the page. Also they have a line card that shows standard sizes and weights for most steel components. I have found this very helpful in estimating final frame weight in my projects. You can find it here: [/url]
http://www.coyotesteel.com/assets/img/P ... llChart.pd [/url]
