The shelf in the first picture is made of red oak plywood. You can choose the wood type, color and design as you like for your project. In case if you need more help understanding this project, you can refer the source link below. It discusses various items used, steps and tips and personal experience of the author who personally built a Zigzag shelf.
We cut the supports 16 in. long, but you can place the second shelf at whatever height you like. Screw the end supports to the walls at each end. Use drywall anchors if you can’t hit a stud. Then mark the position of the middle supports onto the top and bottom shelves with a square and drill 5/32-in. clearance holes through the shelves. Drive 1-5/8-in. screws through the shelf into the supports. You can apply this same concept to garage storage. See how to build double-decker garage storage shelves here.
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Slice, dice and serve in style on this easy, attractive board. We’ll show you a simple way to dry-fit the parts, scribe the arc and then glue the whole thing together. We used a 4-ft. steel ruler to scribe the arcs, but a yardstick or any thin board would also work. Find complete how-to instructions on this woodworking crafts project here. Also, be sure to use water-resistant wood glue and keep your board out of the dishwasher or it might fall apart. And one more thing: Keep the boards as even as possible during glue-up to minimize sanding later. For great tips on gluing wood, check out this collection.