60' x 48' deep shelving - support suggestions
I am building three tiers of shelving in a deep alcove in a laundry room. Alcove dimensions are 60" wide x 48" deep, and this will be for storage bins stuffed with random home stuff, pantry overflow-type stuff (pots, pans, mixer, etc. etc.)
First plan was to build horizontal support frames with 1"x3", then slide plywood onto it. But I'm thinking about gaining some vertical space by eliminating a horizontal frame box, and instead having a center support for each shelf that goes front to back. Do you think that would be enough to avoid shelf deflection, or would you stick with box frames? What would you do to provide the strength, yet minimize the vertical loss of space. Folks want 3 shelves, but I have a low ceiling (perhaps 6" 10" or so)..