Code 5402 applies to employers engaged in the erection of greenhouses, hot houses and solariums for commercial or residential customers.  This classification covers all operations necessary in the erection of these structures in its entirety.  The operations involve excavation, concrete foundation work including the necessary carpentry work in connection with making the forms, erection of the frame, usually light-gauge steel, erection of the sash and installation of the glass panes or erection of the glazed and painted sash.

Some employers also install heating ventilation systems within the greenhouse.  The equipment is set up into place and then secured to the greenhouse frame.  

This classification contemplates the construction of concrete flooring, installation of polyester/acrylic curtains and plumbing/irrigation systems in addition to the erection of the structure.  The employer may also erect prefabricated residential greenhouses or erect solariums.