A few years back I designed an all-wood guitar rack and set it to a 3-D graphics program. I just recently found the files and thought I'd post them here. This rack can be made in 2-3 hours... less if you have a shop set up. You can add carpet if you like for padding. The hinge it folds on is a simple nut and bolt on each end. It folds pretty flat for traveling or storage. Enjoy!
Here's the rack in gray wood, fully assembled. I didn't calculate dimensions as that will depend on the number of guitars you want to rack, the space you have in your room / vehicle, and the type of guitars you're building this for. A bit of measuring and you should be able to come up with dimensions perfect for your needs.
The following photos are in color to show the individual pieces of wood.
Following are "life-like" drawings to show the rack in use.