Build these very simple storage shelves out of 1x6 boards. Add a metal rail to the front if desired.
1 - 1x8 @ 8 foot long
1 - 3/4" wide flat metal stock, 41" long (can be cut with a jigsaw with metal blade)
1-1/4" brad nails
2" self tapping wood screws (try SPAX or similar) OR 1-1/4" pocket hole screws (to use with Kreg Jig)
Also need screws for hanging, this should be determined by your wall type. For a typical wall stud framed with 1/2" drywall, 2-1/2" screws would be great. Use a stud finder to locate studs and simply screw through back of shelf.
2 - 1x8 @ 39-1/2"
2 - 1x8 @ 8"
1 - 3/4" flat metal stock @ 41"
Cut the flat metal stock with a jigsaw with metal blade - use safety glasses. Predrill with metal drill bit and attach to front of shelves. You won't need much for screws - I actually used a 1-1/4" Kreg Jig screw.
NOTE: The metal piece just keeps things from falling off the shelf and won't be super sturdy. This is fine.