I have built a lot of shelves using 1" angle iron. The verticle members are 1" angle. The shelves are 36" long by 18" deep. The 18" pieces are upside down to the 36" front and back. This allows them to be welded with a short weld where they touch.
I make up a jig to weld the shelves together so it is fast once you have the pieces cut. Just set them in and weld. With the 18" sides upside down, you can bolt them to the verticle members.
I drop in a piece of particle board and cover it with a piece of masonite. They will handle a lot of weight. I made a couple that were 4' wide but found that heavy loads would tend to make them sag slightly. I'm talking coffee cans full of nuts and bolts.
I make up a jig to weld the shelves together so it is fast once you have the pieces cut. Just set them in and weld. With the 18" sides upside down, you can bolt them to the verticle members.
I drop in a piece of particle board and cover it with a piece of masonite. They will handle a lot of weight. I made a couple that were 4' wide but found that heavy loads would tend to make them sag slightly. I'm talking coffee cans full of nuts and bolts.

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