Mark out all the studs in the wall and attach a 2x4 in the desired shelving length to the studs in the wall. You can also piece 2x4s (for example: we used two 8 foot long 2x4s to create a 16-foot section, and half of one to create 4-foot sections. Just make sure you adequately attach to studs in wall.) Use 3” or longer screws (depending on wall construction). Use a level to make sure you attach the 2x4 to the wall level. Self-tapping wood screws will make your job much easier.
Once you have the first one up, you can just measure off of it to attach your remaining shelf boards. We suggest figuring shelf heights to fit totes, tools, or whatever you may be storing in these shelves.
Next, screw a second 2x4 to the first 2x4, in the same length. Don’t screw the screw all the way in, and only put two screws in each board. These are just to hold the boards in place.
Next, cut 2x4s to the height of your shelving and screw to the outside 2x4 with 3” or shorter screws. You’ll want a leg on each end and middle legs depending on how long your shelves span.
Now unscrew those screws that attached the second 2x4s to the first ones, and remove the upright leg and crossbar.
Cut 2x4s to 3” less than our plywood shelving pieces, drill pocket holes in one side, and attach to the first shelf boards. If you don’t have a pocket hole jig, you can drive screws at an angle into the first row of 2x4 boards.
Bring the leg set up to the cleats, and screw it to the cleats using 3” screws. Then put a screw through the front shelf bar to attach to the cleats.
We ripped plywood into quarters so it would fit easily inside the shelves. We used 1/2” plywood, but go up to 5/8” or 3/4” if you decide to not use as many cleats.