What you need
3/4 in plywood
Table saw (TechShop)
Chop Saw (TechShop)
Cordless Drill (TechShop)
Drill bit (TechShop)
Counter sink bit (TechShop)
The French cleat is an easy way to hang heavy stuff. It simple to make and cheap. One of the members gave me this piece of hard maple, I was going to make some frames out of the wood but as it was sitting at my house I want to see what it would look like on the wall.
Step 1: Cutting the French Cleat
Rip down the 3/4 ply wood to about 4 inch wide. This may size my various with project to project. Move the blade to 45 degree angle and set the fence to about 2 inches. Rip down your plywood at 45 degrees.
If you only have a one piece of wood, you can rip the 45 degree angle edge of the ply-wood, and then cut the wood to size on the chop saw. All you really need are two 45 degree angles that can lock in to each other.
Cut down to the size that is needed. When cutting the cleat on the chop saw, be sure to keep the larger surface area on the bed of the saw. The wall mounted cleat should be just a slightly longer.