Dear Sri Prasath_Raghavan,
Shade net house is almost like Green house only. This also have GI pipes , Insect net, shade net etc , like in Green house. Only difference will be centre height ( Gh 21 ft and snh will be 13 ft.) and in shade net house there will be no gutters.
Green house is protected from rains , fog and shade net house is protected from high temperatures.
If the farmers construct the shade net house on his own, it will costs at a lower amount. Up to my knowledge , the GI pipes of std sizes required for Shadenet house used by the reputed organisations , will be around 5 to 5 .5 tons. Shade net of 50% required will be around 5,500 sq mtrs and Insect net also of same quantity. GI Binding wire, profiles and springs etc are required.
Logistics expenditure will be at around 10 to 15 % for companies towards materials, fabricating equipments and for labour, apart from taxes and duties.
As per my gathered information, the shade net house construction by the reputed organisations will be more and it will be as per latest technology, and required standards , where as we, the farmers, in general, may compromises for height, gauges/standards of the using materials , if we want to do it on our selves.
If the same standards are maintained by the farmers, the cost of the reputed companies will be 15 to 25% more than , if we construct on our own.
With best wishes, g.p.rao, farmer