How to Build a corner shelf The corners are often unused spaces in your workspace that standard shelves are not designed to use this angular space to its full potential. A simple corner shelf will give you extra storage in your workshop, garage or greenhouse so you can make the most of the space. A shelf corner of the building has basic carpentry skills and can be added to or modified as needed at any time by adding more shelves, external walls or even another unit to gain height. Instructions Use your tape measure, pencil and a framing square to measure and mark three triangles on plywood. Make each of the triangles 3 by 3 by 3 feet. Cut triangles with your puzzle. Measure and a number of brands in each of their tables in 12 inches, 24 inches and 35 inches. Place a stand “L” under each of these measures with your drill and screws. Support each corner boards, with two in each wall. Arrange the two remaining indoors to 2 inches from the corner and the outer two are 36 inches from the corner. Place a rack of plywood on each set of brackets “L” displayed on bulletin boards. Fasten shelves Screw wood screws through the bracket holes and plywood with the drill.