Steel gutters are rolled on site with a transportable roll forming machine. In this way, gutters can be produced in one continuous run to the entire length of the row. One of the greatest benefits of having a continuous length gutter is that there are no seams where water leaks, corrosion and water stagnation can occur. Steel gutters are strong and because of this can span greenhouse bays of up to 5 meters. This enables the gutter to be hung from the greenhouse roof structure at intervals equal to the bay width. Various cross sectional profiles are available depending on the crop type, growing media and grower preferences.
Several different support methods can be used, but most common are wire cradles and hangers that support the gutter from the greenhouse truss and provide and even fall so water is always moving in the drainage channels. At the pathway end of the greenhouse vine turn around brackets are provided, while at the opposite end a drainage collection system is incorporated.