Once you know the weight of your piece, use the chart in the article to select the right cleat(s).
This article shows specs for 3˝,6˝, and 12˝ cleats.
See the video Attaching French Cleats at videos.bullseyeglass.com.
In this free lesson, you’ll learn how to design and calculate basic requirements for a French cleat hanging system, what materials and tools you’ll need, and how to set up the work area. We’ll also cover how to apply and cure the adhesive and how to hang the piece.