I know, more cheap shelves. Let’s face it, most of us would rather buy tools not shelves. With that in mind here is a shlef that only requires 2×4s, 1/2” plywood, wood screws,& some nuts,bolts, & washers. I have seen quite a few of your workshops out there, And a lot of you have metal buildings with C or Z purlins to columns type metal building construction. So this will be the kind of drawing that I’m posting today. You can apply the same principles to a building constructed with wood stud framed walls with minor alterations.
You begin by attaching 2×4s plumb at four foot centers to the purlins on the wall you where want the shelf. Then using your table saw cut a 3/4”x1 1/2” rip from a 2×4 forming a notch that will hold the back of the shelf on the wall and also serve has a lip along the back of the shelf. Rip the plywood to the desired width. Attach the 3/4” rip you cut out of the 2×4 to the front underside of the plywood. Level the notched 2×4 across the plumb 2×4s at the desired height. Attach the back of the plywood shelf to the notched 2×4 and prop up or hang (whatever method is easiest for you) the shelf level, front to back. Miter cut 2×4 bracing to fit under the front lip of the shelf and fit to the plumb 2×4 supporting the shelf. I like to cut my bracing at 60/30 degress so I can space another shelf closer than at 45/45 degree miters.
Below is a picture of shelves that I made using this method. Note* I did “chinups” on the front of these shelves to test them for strength. They held up my 180lbs with no deflection. The shelves are pictured in the center left. That is an overhead lumber rack in the upper left hand part of the picture.
-- Darrell, making more sawdust than I know what to do with