- European norm EN 13031-1 dated 01-11-2004
“Greenhouses: Design and construction”
One of the most important news of these rules is the greenhouse classification based on the following table:
|Category||Useful project life|
|15 years||10 years||5 years|
Greenhouses covered by rigid materials which don’t bear big deformations under load
Greenhouses covered by materials – as plastic films – which can bear big deformations under load
The useful project life is the period during which buildings, subject to the ordinary maintenance, must be used for the purpose they are destined to.