This category includes all the square cable systems for medium-strong climbing plants in various sizes. (For even larger fields, look to system 8030). All square systems can be adapted to the circumstances and can also be installed as a rectangle ('standing' or 'lying'). They are therefore very flexible and ideal for many plants, other than vigorous twiners like wisteria. With clematis and annuals, the grid spaces ('mesh' size) should be less than 30 cm for an optimal coverage. You can learn more in the section on climbing plants. In a following section, you will learn at which dimensions cross clamps instead of cross mounts are used. To find more tips on choosing an appropriate trellis system, see our section on planning.