Cheapest Sturdy Garage Wall Shelf Over 300lb Capacity

Here is youtube video for further explanation.
The idea was to build a stronger shelf, than the standard wire shelves you can buy at the store using basic tools with a cost savings of over 50%. This shelf is not for everyone, but I have accomplished my goal. The shelf can be modified to hold more or less weight.

Image of completed shelf

Money saved can be used for additional tools, and the experience gained used on future projects.

List of Materials

measurements

Draw additional line at your diagonal support locations 16-5/16" below first horizontal line your drew.

Glue furring strips together, make all cuts, predrill furring strips, and set your screws protruding 1/4" from furring strip.

Take furring strips w/ set screws, number them where they will go on wall. Align top of wood to horizontal line and tap with hammer to create a hole where you will pre-drill. Do this with remaining furring strips.

I glued,clamped, screwed, then nailed them together. Let sit for a day. Glue is optional for a bit more strength.

Set in diagonals, they should be able to stand alone. Set top. Nail in place w/ nail gun. Add remaining screws.

That is 180lbs hanging from the center of the shelf. I wouldn't dare try that with a standard wire shelf.

Clamp, nail, and screw end support pieces into place.