http://www.backyardchickens.com/t/508615/best-feeder-to-prevent-waste for chickens on the ground
The feeders in this thread are what I suggest duplicating if you have messy eaters or quail.
Couldn't upload my pic, so here's a link
Sorry for the crudeness of the drawing, just wanted to get something on paper. Pipe sizes and fittings are only suggestions. The larger the pipe, the higher capacity, thus the fewer times you need to fill the system. You'll have to figure out a means of support suitable for your application. To add more feeding troughs, just use combo tee wye's in lieu of a regular 90 (always use a regular 90 on the last layer to avoid wasted/unused feed).
If anything is unclear, let me know what your specific questions. Hope that is helpful.