Posts, trellis girders, and gutters are the main construction elements of a greenhouse. The size of post (both its circumference and the thickness of post walls) and of trellis girders (both the circumference and wall thickness of beams, as well as the thickness push and pull profiles) depend on the height, length, and width of the greenhouse, as well as on conditions set by the client, such as structures which must bear the additional weight of hanging gutters.

The parameters of posts, trellis girders, and rods, and also of other construction elements for each greenhouse are calculated according to the factors outlined above.

We use specially designed computer programs, such as Casta Kassenbouw (T.N.O.) for these calculations.