Hey Samantha, our office put together a discussion on visible storage for our blog not too long ago. http://collectionsconversations.wordpress.com/2012/05/18/visible-storage/
I’d recommend taking a look at an article the blog cites by Dee Stubbs-Lee. She’s a conservator in Canada who wrote an M.A. Thesis on visible storage. I’m pretty sure I remember some technical guidelines in there. I love the idea of visible storage and the example we have here in NC has been really successful, although they’re not hurting for storage space (so far). I do realize there are significant concerns about its implementation. Good luck with your process.