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CharacteristicsWindow's FrameFloor and StepsSwimming Pool Windows


The GTC is a web platform developed for the calculation of the thickness of glass in the most common uses and applications in civil works


With the GTC you can, in a few steps, find the optimal thickness for different applications, always in conformity with current regulations. At the end you may print a calculation report, which will provide the rationale for your choices.


The report may be customized and will provide product standards, observations and advice for the user. If you wish, the report may form part of the Contractual Documents and Final Designs.

Reference Standards

DIN 18008 (1, 2 e 5)EN 1990 2009EN1991-1-1 2009EN1991-1-4 2010NP 4517 2014 (Portugal)
DL 235/83 RSAEEP (Portugal)SE-AE 2009 (Spain)

By subscribing to the platform, you will gain access to several calculation modules for the different case studies.

Subscription requires an unlimited annual licence for use per subscribed module. You may also subscribe to packs of modules, as well as specific annexes for each module from different EU countries.

Available National Annexes:

  • Portuguese (EC1 + DL 235/83 RSAEEP - Portugal)
  • German (EC1)
  • French (EC1)
  • Italian (EC1)
  • Spanish (SE-AE - Spain)