With these simple brackets and some inexpensive 1 × 2 lumber, you can quickly build structures such as cold frames, trellises or row cover supports. Each bracket set contains three pieces to make one triangular form; by adding horizontal supports into the channels provided, you can link two or more triangles to make stable structures of nearly any length. You then just apply the protective material of your choice (e.g., fleece, shade cloth, netting) over the structure.