|Author: ||J.C. SPEK|
The economy and the horticultural suitability are the determining factors in glasshouse construction.
The Dutch Light structure is a succesful and widely-used form of construction.
The method of the construction will be explained with various details.
The principle of the gutter without condensation dripping will be discussed.
Besides the Dutch Light structure the glasshouse - with truss and purlins - will be discussed, for which the three-joint truss is chosen with a non-elastic tie, suspended to the purlin support.
Wood and steel must be preserved in the glasshouse.
The wood behaviour will be discussed with the details of sash-bars, finished with adhesive tape or clamped, and also hot-dip galvanising, painting and preservation.
A variant construction in aluminium based on the “Venlo” type will be illustrated.
A drip-free purlin fastening has been developed for polyester corrugated panels.
In the Netherlands wood, steel and glass appear to be the up-to-date materials until now, because plastics and aluminium are too expensive.
Moreover, both the last-mentioned materials are - both in respect of output and characteristics - not yet attractive for horticulture.
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