GlazenStad
GlazenStad is the calculation program and knowledge system for the aluminium of the greenhouse roof deck — the glazing bars, gutters and ridges — and the counterpart to CASTA on the steel side. Output from CASTA reads into it directly. It is governed by Stichting Hortivation and was developed with TNO, and the aluminium system houses participate in it. The standard it verifies against is NEN-EN 13031-1.