Which materials are used in constructing the solar dryers?

Materials used in greenhouse construction.

Galvanized steel structure(38mm Poles), 200microns UV-Open, Diffused light transmission of 80%, Haze at 51.7 Roofing and Side Polyethene Paper Structure fittings

 
Drying Shelves: White net base -2M high trays -3 layers spaced 0.5M -1M wide -14M long 
Greenhouse Air Circulation: Fan 500mm Voltage: 240V Phase: Single/3 Phase Frequency: 50Hz Power Rating: 180W Air Volume 5300 m3/h